Re: Pentax FF DSLR is vaporware?

2013-05-20 Thread Joseph McAllister

On May 19, 2013, at 16:50 , Darren Addy wrote:

 I should also mention another significant negative... when you lose
 the crop factor you lose at the telephoto end. So your 500mm lens goes
 back to being a 500mm FOV instead of a 750mm FOV... meaning you will
 have to buy longer lenses to make up for what you lost (or keep your
 APS-C camera for just such a reason).

Or buy a Q body for 2750 mm lens when you really have to reach.

At that power, you really get into atmospherics anomalies, plus lens design 
flaws that show up when you are only using the very center of the field of view 
of a given 35mm lens. Sure is fun to try though!


Joseph McAllister
Too much gear, not much time






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Re: Pentax FF DSLR is vaporware?

2013-05-20 Thread Tim Øsleby
6) (or whatever the number is). Larger viewfinder.

For me, that's number one. More pixels, less DOF etc might come handy
every now and then,
but I know I would appreciate to see what's in frame when clicking the button.

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My private photo blog: http://maritimtim.blogspot.com/


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to arr is pirate



2013/5/20 Darren Addy pixelsmi...@gmail.com:
 P.J. is right, at least in my case. If/when Pentax introduces a full
 frame DSLR, I will probably buy one (eventually) but I won't be one of
 the first in line. A full frame sensor, by itself doesn't really gain
 you anything except:
 1) shallower DOF (at the same focal length, compared to a APS-C)
 2) losing the crop factor (meaning your 15mm is a 15mm FOV instead of
 a 22mm FOV) - helpful at the wide angle end and for tilt-shift lens
 users.
 3) more megapixels (potentially significant depending upon the pixel pitch)
 4) if a larger pixel pitch, then potentially better noise performance
 at equivalent ISOs


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Re: Pentax FF DSLR is vaporware?

2013-05-20 Thread J.C. O'Connell
Well if APSC is more than good enough why did Pentax bother to develop 
and actually

produce the 645D ? ? ? ? ?
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Re: Pentax FF DSLR is vaporware?

2013-05-20 Thread Paul Stenquist
There are some things for which APS-C isn't good enough: spreads in Vogue, 
billboards, and impressing the easily impressed. But for the vast majority of 
what the vast majority of us do, APS-C is indeed good enough.

Paul
On May 20, 2013, at 2:48 PM, J.C. O'Connell hifis...@gate.net wrote:

 Well if APSC is more than good enough why did Pentax bother to develop and 
 actually
 produce the 645D ? ? ? ? ?
 -- 
 J.C. O'Connell
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Re: Pentax FF DSLR is vaporware?

2013-05-20 Thread Darren Addy
The same reason that camera makers made medium format film cameras
when the majority of users were more than happy with what they could
do with 35mm film cameras. (That is to say that there was a market for
them).

On Mon, May 20, 2013 at 1:48 PM, J.C. O'Connell hifis...@gate.net wrote:
 Well if APSC is more than good enough why did Pentax bother to develop and
 actually
 produce the 645D ? ? ? ? ?

 --
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Re: Pentax FF DSLR is vaporware?

2013-05-20 Thread J.C. O'Connell

On 5/20/2013 3:17 PM, Darren Addy wrote:

The same reason that camera makers made medium format film cameras
when the majority of users were more than happy with what they could
do with 35mm film cameras. (That is to say that there was a market for
them).

On Mon, May 20, 2013 at 1:48 PM, J.C. O'Connell hifis...@gate.net wrote:

Well if APSC is more than good enough why did Pentax bother to develop and
actually
produce the 645D ? ? ? ? ?

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I say there was a NEED for the 645D, higher quality images than the 
APSC. As was once said,

Necessity is the mother of invention.

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RE: Pentax FF DSLR is vaporware?

2013-05-19 Thread John Sessoms

From: J.C. O'Connell

Seriously, what is the latest rumours about FF Pentax dslr?


The latest seems to be the officially deemed FAKE mid-March 2013 rumor
that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
Instead we got 9 bold new colors for the K-30 (which BTW was no longer
on display at Tiger Direct during my weekly music/computer store
pilgrimage last week).

Since then, all I'm aware of is the recurring generic rumor that Pentax
will announce a Full Frame DSLR next year.

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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread P.J. Alling

On 5/19/2013 4:21 PM, John Sessoms wrote:

From: J.C. O'Connell

Seriously, what is the latest rumours about FF Pentax dslr?


The latest seems to be the officially deemed FAKE mid-March 2013 rumor
that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
Instead we got 9 bold new colors for the K-30 (which BTW was no longer
on display at Tiger Direct during my weekly music/computer store
pilgrimage last week).

Since then, all I'm aware of is the recurring generic rumor that Pentax
will announce a Full Frame DSLR next year.

The beauty being that the the rumor will always be fresh, there is 
always a next year...


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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Tim Øsleby
Are you sure?
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My private photo blog: http://maritimtim.blogspot.com/


To err is human
to arr is pirate



2013/5/20 P.J. Alling webstertwenty...@gmail.com:
 On 5/19/2013 4:21 PM, John Sessoms wrote:

 From: J.C. O'Connell

 Seriously, what is the latest rumours about FF Pentax dslr?


 The latest seems to be the officially deemed FAKE mid-March 2013 rumor
 that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
 Instead we got 9 bold new colors for the K-30 (which BTW was no longer
 on display at Tiger Direct during my weekly music/computer store
 pilgrimage last week).

 Since then, all I'm aware of is the recurring generic rumor that Pentax
 will announce a Full Frame DSLR next year.

 The beauty being that the the rumor will always be fresh, there is always a
 next year...

 --
 There are two kinds of computer users those who've experienced a hard drive
 failure, and those that will.


 --
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 PDML@pdml.net
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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread P.J. Alling

If there isn't we probably won't care...

On 5/19/2013 7:04 PM, Tim Øsleby wrote:

Are you sure?
--
MaritimTim

My private photo blog: http://maritimtim.blogspot.com/


To err is human
to arr is pirate



2013/5/20 P.J. Alling webstertwenty...@gmail.com:

On 5/19/2013 4:21 PM, John Sessoms wrote:

From: J.C. O'Connell

Seriously, what is the latest rumours about FF Pentax dslr?


The latest seems to be the officially deemed FAKE mid-March 2013 rumor
that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
Instead we got 9 bold new colors for the K-30 (which BTW was no longer
on display at Tiger Direct during my weekly music/computer store
pilgrimage last week).

Since then, all I'm aware of is the recurring generic rumor that Pentax
will announce a Full Frame DSLR next year.


The beauty being that the the rumor will always be fresh, there is always a
next year...

--
There are two kinds of computer users those who've experienced a hard drive
failure, and those that will.


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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Darren Addy
P.J. is right, at least in my case. If/when Pentax introduces a full
frame DSLR, I will probably buy one (eventually) but I won't be one of
the first in line. A full frame sensor, by itself doesn't really gain
you anything except:
1) shallower DOF (at the same focal length, compared to a APS-C)
2) losing the crop factor (meaning your 15mm is a 15mm FOV instead of
a 22mm FOV) - helpful at the wide angle end and for tilt-shift lens
users.
3) more megapixels (potentially significant depending upon the pixel pitch)
4) if a larger pixel pitch, then potentially better noise performance
at equivalent ISOs

The downsides:
It depends upon what sort of shooting you do, but a larger filesize is
probably going to mean lower frames per second on burst performance
for action shooting, compared to a APS-C camera. Fewer frames until
your buffer is full and has to wait to take another shot.
Larger filesizes means more computing power to post-process and store
images (something we seem willing to live with).
Macro shooters will find thinner DOF to be a disadvantage, rather than
an advantage
Full frame DSLRs will really show the deficiencies in your lenses,
particularly in the corners.

That said, Pentax probably needs to produce a full frame DSLR, just to
show they belong with the big boys and prevent some (more) from
jumping ship to another brand.

For my part, I love wide angle but find that the Sigma EX 10-20mm more
than meets my needs on the wide angle end of the spectrum on a APS-C
camera. I also love macro, so the increased DOF is a plus on an APS-C.
The K-5/K-5 II already leads the pack at high ISO performance and the
megapixels already exceeds what I need for the print sizes I will
realistically ever print. I can get shallow DOF with my Sigma EX 28mm
f1.8, my CZJ 35mm f2.4, and my 85mm f1.5s (heck, the DOF is shallow
enough in many cases on my Bigma - why would I want to make it more
challenging?)

In short, the Pentax flagship cameras meet or exceed my expectations
right now and a full frame doesn't do a lot for me other than let me
proclaim that I have a full frame camera.

On Sun, May 19, 2013 at 6:09 PM, P.J. Alling webstertwenty...@gmail.com wrote:
 If there isn't we probably won't care...


 On 5/19/2013 7:04 PM, Tim Øsleby wrote:

 Are you sure?
 --
 MaritimTim

 My private photo blog: http://maritimtim.blogspot.com/


 
 To err is human
 to arr is pirate

 


 2013/5/20 P.J. Alling webstertwenty...@gmail.com:

 On 5/19/2013 4:21 PM, John Sessoms wrote:

 From: J.C. O'Connell

 Seriously, what is the latest rumours about FF Pentax dslr?


 The latest seems to be the officially deemed FAKE mid-March 2013 rumor
 that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
 Instead we got 9 bold new colors for the K-30 (which BTW was no longer
 on display at Tiger Direct during my weekly music/computer store
 pilgrimage last week).

 Since then, all I'm aware of is the recurring generic rumor that Pentax
 will announce a Full Frame DSLR next year.

 The beauty being that the the rumor will always be fresh, there is always
 a
 next year...

 --
 There are two kinds of computer users those who've experienced a hard
 drive
 failure, and those that will.


 --
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 PDML@pdml.net
 http://pdml.net/mailman/listinfo/pdml_pdml.net
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 follow the directions.



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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Darren Addy
Sorry typo: that should be 85mm f1.8s (and the CZJ is a Flektogon Electric)

On Sun, May 19, 2013 at 6:35 PM, Darren Addy pixelsmi...@gmail.com wrote:
 P.J. is right, at least in my case. If/when Pentax introduces a full
 frame DSLR, I will probably buy one (eventually) but I won't be one of
 the first in line. A full frame sensor, by itself doesn't really gain
 you anything except:
 1) shallower DOF (at the same focal length, compared to a APS-C)
 2) losing the crop factor (meaning your 15mm is a 15mm FOV instead of
 a 22mm FOV) - helpful at the wide angle end and for tilt-shift lens
 users.
 3) more megapixels (potentially significant depending upon the pixel pitch)
 4) if a larger pixel pitch, then potentially better noise performance
 at equivalent ISOs

 The downsides:
 It depends upon what sort of shooting you do, but a larger filesize is
 probably going to mean lower frames per second on burst performance
 for action shooting, compared to a APS-C camera. Fewer frames until
 your buffer is full and has to wait to take another shot.
 Larger filesizes means more computing power to post-process and store
 images (something we seem willing to live with).
 Macro shooters will find thinner DOF to be a disadvantage, rather than
 an advantage
 Full frame DSLRs will really show the deficiencies in your lenses,
 particularly in the corners.

 That said, Pentax probably needs to produce a full frame DSLR, just to
 show they belong with the big boys and prevent some (more) from
 jumping ship to another brand.

 For my part, I love wide angle but find that the Sigma EX 10-20mm more
 than meets my needs on the wide angle end of the spectrum on a APS-C
 camera. I also love macro, so the increased DOF is a plus on an APS-C.
 The K-5/K-5 II already leads the pack at high ISO performance and the
 megapixels already exceeds what I need for the print sizes I will
 realistically ever print. I can get shallow DOF with my Sigma EX 28mm
 f1.8, my CZJ 35mm f2.4, and my 85mm f1.5s (heck, the DOF is shallow
 enough in many cases on my Bigma - why would I want to make it more
 challenging?)

 In short, the Pentax flagship cameras meet or exceed my expectations
 right now and a full frame doesn't do a lot for me other than let me
 proclaim that I have a full frame camera.

 On Sun, May 19, 2013 at 6:09 PM, P.J. Alling webstertwenty...@gmail.com 
 wrote:
 If there isn't we probably won't care...


 On 5/19/2013 7:04 PM, Tim Øsleby wrote:

 Are you sure?
 --
 MaritimTim

 My private photo blog: http://maritimtim.blogspot.com/


 
 To err is human
 to arr is pirate

 


 2013/5/20 P.J. Alling webstertwenty...@gmail.com:

 On 5/19/2013 4:21 PM, John Sessoms wrote:

 From: J.C. O'Connell

 Seriously, what is the latest rumours about FF Pentax dslr?


 The latest seems to be the officially deemed FAKE mid-March 2013 rumor
 that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
 Instead we got 9 bold new colors for the K-30 (which BTW was no longer
 on display at Tiger Direct during my weekly music/computer store
 pilgrimage last week).

 Since then, all I'm aware of is the recurring generic rumor that Pentax
 will announce a Full Frame DSLR next year.

 The beauty being that the the rumor will always be fresh, there is always
 a
 next year...

 --
 There are two kinds of computer users those who've experienced a hard
 drive
 failure, and those that will.


 --
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 PDML@pdml.net
 http://pdml.net/mailman/listinfo/pdml_pdml.net
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 follow the directions.



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 Peter Galassi



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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Darren Addy
I should also mention another significant negative... when you lose
the crop factor you lose at the telephoto end. So your 500mm lens goes
back to being a 500mm FOV instead of a 750mm FOV... meaning you will
have to buy longer lenses to make up for what you lost (or keep your
APS-C camera for just such a reason).

On Sun, May 19, 2013 at 6:37 PM, Darren Addy pixelsmi...@gmail.com wrote:
 Sorry typo: that should be 85mm f1.8s (and the CZJ is a Flektogon Electric)

 On Sun, May 19, 2013 at 6:35 PM, Darren Addy pixelsmi...@gmail.com wrote:
 P.J. is right, at least in my case. If/when Pentax introduces a full
 frame DSLR, I will probably buy one (eventually) but I won't be one of
 the first in line. A full frame sensor, by itself doesn't really gain
 you anything except:
 1) shallower DOF (at the same focal length, compared to a APS-C)
 2) losing the crop factor (meaning your 15mm is a 15mm FOV instead of
 a 22mm FOV) - helpful at the wide angle end and for tilt-shift lens
 users.
 3) more megapixels (potentially significant depending upon the pixel pitch)
 4) if a larger pixel pitch, then potentially better noise performance
 at equivalent ISOs

 The downsides:
 It depends upon what sort of shooting you do, but a larger filesize is
 probably going to mean lower frames per second on burst performance
 for action shooting, compared to a APS-C camera. Fewer frames until
 your buffer is full and has to wait to take another shot.
 Larger filesizes means more computing power to post-process and store
 images (something we seem willing to live with).
 Macro shooters will find thinner DOF to be a disadvantage, rather than
 an advantage
 Full frame DSLRs will really show the deficiencies in your lenses,
 particularly in the corners.

 That said, Pentax probably needs to produce a full frame DSLR, just to
 show they belong with the big boys and prevent some (more) from
 jumping ship to another brand.

 For my part, I love wide angle but find that the Sigma EX 10-20mm more
 than meets my needs on the wide angle end of the spectrum on a APS-C
 camera. I also love macro, so the increased DOF is a plus on an APS-C.
 The K-5/K-5 II already leads the pack at high ISO performance and the
 megapixels already exceeds what I need for the print sizes I will
 realistically ever print. I can get shallow DOF with my Sigma EX 28mm
 f1.8, my CZJ 35mm f2.4, and my 85mm f1.5s (heck, the DOF is shallow
 enough in many cases on my Bigma - why would I want to make it more
 challenging?)

 In short, the Pentax flagship cameras meet or exceed my expectations
 right now and a full frame doesn't do a lot for me other than let me
 proclaim that I have a full frame camera.

 On Sun, May 19, 2013 at 6:09 PM, P.J. Alling webstertwenty...@gmail.com 
 wrote:
 If there isn't we probably won't care...


 On 5/19/2013 7:04 PM, Tim Øsleby wrote:

 Are you sure?
 --
 MaritimTim

 My private photo blog: http://maritimtim.blogspot.com/


 
 To err is human
 to arr is pirate

 


 2013/5/20 P.J. Alling webstertwenty...@gmail.com:

 On 5/19/2013 4:21 PM, John Sessoms wrote:

 From: J.C. O'Connell

 Seriously, what is the latest rumours about FF Pentax dslr?


 The latest seems to be the officially deemed FAKE mid-March 2013 rumor
 that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
 Instead we got 9 bold new colors for the K-30 (which BTW was no longer
 on display at Tiger Direct during my weekly music/computer store
 pilgrimage last week).

 Since then, all I'm aware of is the recurring generic rumor that Pentax
 will announce a Full Frame DSLR next year.

 The beauty being that the the rumor will always be fresh, there is always
 a
 next year...

 --
 There are two kinds of computer users those who've experienced a hard
 drive
 failure, and those that will.


 --
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 PDML@pdml.net
 http://pdml.net/mailman/listinfo/pdml_pdml.net
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 follow the directions.



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 Photography is a Bastard left by Science on the Doorstep of Art -
 Peter Galassi



 --
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 Peter Galassi



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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Rob Studdert
On 20 May 2013 09:50, Darren Addy pixelsmi...@gmail.com wrote:
 I should also mention another significant negative... when you lose
 the crop factor you lose at the telephoto end. So your 500mm lens goes
 back to being a 500mm FOV instead of a 750mm FOV... meaning you will
 have to buy longer lenses to make up for what you lost (or keep your
 APS-C camera for just such a reason).

Or you could play a little trick on yourself and crop out an APS-c
sized pic  (assuming similar pixel density) :)

--
Rob Studdert (Digital  Image Studio)
Tel: +61-418-166-870 UTC +10 Hours
Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio

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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Darren Addy
True, but, if i'm honest with myself i'm already cropping my APS-C
images to Pentax Q sizes.
;)

On Sun, May 19, 2013 at 6:53 PM, Rob Studdert distudio.p...@gmail.com wrote:
 On 20 May 2013 09:50, Darren Addy pixelsmi...@gmail.com wrote:
 I should also mention another significant negative... when you lose
 the crop factor you lose at the telephoto end. So your 500mm lens goes
 back to being a 500mm FOV instead of a 750mm FOV... meaning you will
 have to buy longer lenses to make up for what you lost (or keep your
 APS-C camera for just such a reason).

 Or you could play a little trick on yourself and crop out an APS-c
 sized pic  (assuming similar pixel density) :)

 --
 Rob Studdert (Digital  Image Studio)
 Tel: +61-418-166-870 UTC +10 Hours
 Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio

 --
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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Rob Studdert
On 20 May 2013 10:17, Darren Addy pixelsmi...@gmail.com wrote:
 True, but, if i'm honest with myself i'm already cropping my APS-C
 images to Pentax Q sizes.
 ;)

Har, I know where you're coming from, I really could have done with a
500mm lens at the airshow I attended a couple of weeks back :)

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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Mark Roberts
P.J. Alling wrote:

The beauty being that the the rumor will always be fresh, there is 
always a next year...

These rumors go in cycles. I remember the 645D is vaporware threads
and the (60-250/4 is vaporware) threads.
 
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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Doug Brewer

On 5/19/13 8:42 PM, Mark Roberts wrote:

P.J. Alling wrote:


The beauty being that the the rumor will always be fresh, there is
always a next year...


These rumors go in cycles. I remember the 645D is vaporware threads
and the (60-250/4 is vaporware) threads.




Not to mention the Pentax DSLR is vaporware threads.

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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread J.C. O'Connell
I disagree with one point made below. FF actually allows LOWER quality 
lenses to be
used because the absolute lines/mm doesnt have to be as high for same 
quality of
results.  Yes with some really bad lenses the softness in the corners 
may become more
visible, but with decent lenses, FF puts less emphisis on lens quality 
than apsc does.


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hifis...@gate.net
--





On 5/19/2013 7:35 PM, Darren Addy wrote:

P.J. is right, at least in my case. If/when Pentax introduces a full
frame DSLR, I will probably buy one (eventually) but I won't be one of
the first in line. A full frame sensor, by itself doesn't really gain
you anything except:
1) shallower DOF (at the same focal length, compared to a APS-C)
2) losing the crop factor (meaning your 15mm is a 15mm FOV instead of
a 22mm FOV) - helpful at the wide angle end and for tilt-shift lens
users.
3) more megapixels (potentially significant depending upon the pixel pitch)
4) if a larger pixel pitch, then potentially better noise performance
at equivalent ISOs

The downsides:
It depends upon what sort of shooting you do, but a larger filesize is
probably going to mean lower frames per second on burst performance
for action shooting, compared to a APS-C camera. Fewer frames until
your buffer is full and has to wait to take another shot.
Larger filesizes means more computing power to post-process and store
images (something we seem willing to live with).
Macro shooters will find thinner DOF to be a disadvantage, rather than
an advantage
Full frame DSLRs will really show the deficiencies in your lenses,
particularly in the corners.

That said, Pentax probably needs to produce a full frame DSLR, just to
show they belong with the big boys and prevent some (more) from
jumping ship to another brand.

For my part, I love wide angle but find that the Sigma EX 10-20mm more
than meets my needs on the wide angle end of the spectrum on a APS-C
camera. I also love macro, so the increased DOF is a plus on an APS-C.
The K-5/K-5 II already leads the pack at high ISO performance and the
megapixels already exceeds what I need for the print sizes I will
realistically ever print. I can get shallow DOF with my Sigma EX 28mm
f1.8, my CZJ 35mm f2.4, and my 85mm f1.5s (heck, the DOF is shallow
enough in many cases on my Bigma - why would I want to make it more
challenging?)

In short, the Pentax flagship cameras meet or exceed my expectations
right now and a full frame doesn't do a lot for me other than let me
proclaim that I have a full frame camera.

On Sun, May 19, 2013 at 6:09 PM, P.J. Alling webstertwenty...@gmail.com wrote:

If there isn't we probably won't care...


On 5/19/2013 7:04 PM, Tim Øsleby wrote:

Are you sure?
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to arr is pirate




2013/5/20 P.J. Alling webstertwenty...@gmail.com:

On 5/19/2013 4:21 PM, John Sessoms wrote:

From: J.C. O'Connell

Seriously, what is the latest rumours about FF Pentax dslr?


The latest seems to be the officially deemed FAKE mid-March 2013 rumor
that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
Instead we got 9 bold new colors for the K-30 (which BTW was no longer
on display at Tiger Direct during my weekly music/computer store
pilgrimage last week).

Since then, all I'm aware of is the recurring generic rumor that Pentax
will announce a Full Frame DSLR next year.


The beauty being that the the rumor will always be fresh, there is always
a
next year...

--
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drive
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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Rob Studdert
On 20 May 2013 12:22, J.C. O'Connell hifis...@gate.net wrote:
 I disagree with one point made below. FF actually allows LOWER quality
 lenses to be
 used because the absolute lines/mm doesnt have to be as high for same
 quality of
 results.  Yes with some really bad lenses the softness in the corners may
 become more
 visible, but with decent lenses, FF puts less emphisis on lens quality than
 apsc does.

The problem is twofold, firstly obviously lens quality falls off
towards the edges so many lenses that were OK on cropped format may
look decidedly less attractive when used on a  full frame body.
Secondly people will pixel peep 100%, make judgements and proclaim a
lens good or bad without considering magnification factor or final
print sizes.

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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread J.C. O'Connell

On 5/19/2013 10:27 PM, Rob Studdert wrote:

On 20 May 2013 12:22, J.C. O'Connell hifis...@gate.net wrote:

I disagree with one point made below. FF actually allows LOWER quality
lenses to be
used because the absolute lines/mm doesnt have to be as high for same
quality of
results.  Yes with some really bad lenses the softness in the corners may
become more
visible, but with decent lenses, FF puts less emphisis on lens quality than
apsc does.

The problem is twofold, firstly obviously lens quality falls off
towards the edges so many lenses that were OK on cropped format may
look decidedly less attractive when used on a  full frame body.
Secondly people will pixel peep 100%, make judgements and proclaim a
lens good or bad without considering magnification factor or final
print sizes.

--
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Tel: +61-418-166-870 UTC +10 Hours
Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio

The simple physics is that if the FF sensor is 50% longer than the APSC 
sensor in both dimensions,

the FF lens only needs to provide 2/3 the resolution of the APSC lens
to match the overall system resolution. If the FF lens approaches the
quality of the APSC lens, then a near doubling of system resolution can
be achieved. What this means in real world terms is that you dont need
super world class lenses on FF to get great results, unlike with APCS
sized sensors.

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hifis...@gate.net
--


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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Rob Studdert
On 20 May 2013 12:44, J.C. O'Connell hifis...@gate.net wrote:

 The simple physics is that if the FF sensor is 50% longer than the APSC
 sensor in both dimensions,
 the FF lens only needs to provide 2/3 the resolution of the APSC lens
 to match the overall system resolution. If the FF lens approaches the
 quality of the APSC lens, then a near doubling of system resolution can
 be achieved. What this means in real world terms is that you dont need
 super world class lenses on FF to get great results, unlike with APCS
 sized sensors.

Look at the MTF diagram of most any lens designed to cover a FF lens
and note the fall off in resolution/contrast 2/3 from the centre of
the frame, the APS sensors very conveniently disregard this area of
poor performance.

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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread J.C. O'Connell

On 5/19/2013 10:51 PM, Rob Studdert wrote:

On 20 May 2013 12:44, J.C. O'Connell hifis...@gate.net wrote:


The simple physics is that if the FF sensor is 50% longer than the APSC
sensor in both dimensions,
the FF lens only needs to provide 2/3 the resolution of the APSC lens
to match the overall system resolution. If the FF lens approaches the
quality of the APSC lens, then a near doubling of system resolution can
be achieved. What this means in real world terms is that you dont need
super world class lenses on FF to get great results, unlike with APCS
sized sensors.

Look at the MTF diagram of most any lens designed to cover a FF lens
and note the fall off in resolution/contrast 2/3 from the centre of
the frame, the APS sensors very conveniently disregard this area of
poor performance.

--
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Tel: +61-418-166-870 UTC +10 Hours
Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio

yes, most FF lenses do have less sharpness in the corners, but as long 
as its not less than 2/3 of
a drop off, there is no overall system loss of resolution compared to a 
APSC lens/sensor system
with no corner dropoff whatsoever.  Its similar to large format film vs 
smaller format film. The larger
the format, the less critical the lens becomes because the absolute 
resolution of the lens times
the area covered is still more than a small format area used with a high 
resolution lens.


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hifis...@gate.net
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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Kenneth Waller
Like the Brooklyn Dodgers said year after year when they had just lost the 
World Series - 'Wait till next year'.


-Original Message-
From: P.J. Alling webstertwenty...@gmail.com
Subject: Re: Pentax FF DSLR is vaporware?

On 5/19/2013 4:21 PM, John Sessoms wrote:
 From: J.C. O'Connell
 Seriously, what is the latest rumours about FF Pentax dslr?

 The latest seems to be the officially deemed FAKE mid-March 2013 rumor
 that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
 Instead we got 9 bold new colors for the K-30 (which BTW was no longer
 on display at Tiger Direct during my weekly music/computer store
 pilgrimage last week).

 Since then, all I'm aware of is the recurring generic rumor that Pentax
 will announce a Full Frame DSLR next year.

The beauty being that the the rumor will always be fresh, there is 
always a next year...

-- 
There are two kinds of computer users those who've experienced a hard drive 
failure, and those that will.



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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Paul Stenquist
Current Pentax lenses work great on current Pentax cameras. Why belabor this FF 
hysteria? All Pentax cameras have full frames. None have 24 x 36 frames. Get 
over it.
Pual
On May 19, 2013, at 10:51 PM, Rob Studdert distudio.p...@gmail.com wrote:

 On 20 May 2013 12:44, J.C. O'Connell hifis...@gate.net wrote:
 
 The simple physics is that if the FF sensor is 50% longer than the APSC
 sensor in both dimensions,
 the FF lens only needs to provide 2/3 the resolution of the APSC lens
 to match the overall system resolution. If the FF lens approaches the
 quality of the APSC lens, then a near doubling of system resolution can
 be achieved. What this means in real world terms is that you dont need
 super world class lenses on FF to get great results, unlike with APCS
 sized sensors.
 
 Look at the MTF diagram of most any lens designed to cover a FF lens
 and note the fall off in resolution/contrast 2/3 from the centre of
 the frame, the APS sensors very conveniently disregard this area of
 poor performance.
 
 --
 Rob Studdert (Digital  Image Studio)
 Tel: +61-418-166-870 UTC +10 Hours
 Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio
 
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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Rob Studdert
On 20 May 2013 13:35, Paul Stenquist pnstenqu...@comcast.net wrote:
 Current Pentax lenses work great on current Pentax cameras. Why belabor this 
 FF hysteria? All Pentax cameras have full frames. None have 24 x 36 frames. 
 Get over it.
 Pual

This is just a discussion on the physics of the issue, there's really
nothing to get over.

It might happen, it might not, personally I don't really care any longer.

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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Larry Colen
On Sun, May 19, 2013 at 10:22:51PM -0400, J.C. O'Connell wrote:
 I disagree with one point made below. FF actually allows LOWER
 quality lenses to be
 used because the absolute lines/mm doesnt have to be as high for
 same quality of
 results.  Yes with some really bad lenses the softness in the
 corners may become more
 visible, but with decent lenses, FF puts less emphisis on lens
 quality than apsc does.

That's pretty much what Ken Rockwell says:

You Can Use Cheap Lenses!

I get better results on full-frame with crummy lenses than I do with my very 
best lenses on DX.

Having bigger pixels on a larger format means you can use cheaper lenses and 
usually get better results than the best lenses on a smaller format. The only 
reason I use the weasel word of usually is because as of 2007 we're only 
talking about a 1.6x linear format difference among consumer (under $9,000) 
DSLRs. In film, with a 2x linear difference from one format to the next, the 
crappiest lens on the next bigger format always smokes the very best lens on 
the next smaller format.



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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Boris Liberman

On 5/20/2013 2:35 AM, Darren Addy wrote:

In short, the Pentax flagship cameras meet or exceed my expectations
right now and a full frame doesn't do a lot for me other than let me
proclaim that I have a full frame camera.


Very well said, Darren. I totally agree...

Now, not answering you directly, but rather to a topic question:

In fact, for me Pentax DSLRs such as K-5 exceed my expectations and 
abilities in such a manner that by now I shoot exclusively with Ricoh 
GXR-M module with or without K-mount adapter. I should say that A 50/1.2 
is one fine lens on that camera body and it is not as big or heavy... 
Additionally, Nokton 40/1.4 is even so much smaller and lighter making 
Ricoh GXR-M with it pretty much a perfect camera for me - in terms of 
size, ergonomics vs price, convenience vs picture quality that I am able 
to get from it.


In the past I was rather strong proponent of (Pentax) FF, but I have 
changed my mind. I don't think that I need the added bulk of FF camera 
(it ain't gonna be small, at least by now) and added bulk of RAW files 
from it - 24 MP RAW files aren't small... I may benefit some things such 
as AOV or DOF, but it is far less critical that I thought it might be...


Boris



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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Boris Liberman

On 5/20/2013 5:44 AM, J.C. O'Connell wrote:

The simple physics is that if the FF sensor is 50% longer than the APSC
sensor in both dimensions,
the FF lens only needs to provide 2/3 the resolution of the APSC lens
to match the overall system resolution. If the FF lens approaches the
quality of the APSC lens, then a near doubling of system resolution can
be achieved. What this means in real world terms is that you dont need
super world class lenses on FF to get great results, unlike with APCS
sized sensors.


JC, consider this: 36 MP of Nikon D800 is more than twice the 16 MP of 
Pentax K-5 or Nikon D7000. Therefore your FF Nikkors ought to be as good 
as they are on your APS-C D7000 in terms of spatial resolution.


Consider further, that it stands to reason that the next generation of 
FF sensors will have even more pixels in them. I vaguely (sorry :-( ) 
recall rumors of next Canon FF DSLR flagship having in excess of 40 MP. 
Therefore on FF your lenses actually have to be even better in this 
regard than they were on current APS-C cameras.


So in theory you're right, but it would seem to me that technology would 
soon enough overtake your theory, in a manner of speaking.


Boris


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Re: Pentax FF DSLR is vaporware?

2013-05-19 Thread Christine Aguila
In Chicago we say maybe next year.  :-)  Christine


On May 19, 2013, at 10:14 PM, Kenneth Waller kwal...@peoplepc.com wrote:

 Like the Brooklyn Dodgers said year after year when they had just lost the 
 World Series - 'Wait till next year'.
 
 
 -Original Message-
 From: P.J. Alling webstertwenty...@gmail.com
 Subject: Re: Pentax FF DSLR is vaporware?
 
 On 5/19/2013 4:21 PM, John Sessoms wrote:
 From: J.C. O'Connell
 Seriously, what is the latest rumours about FF Pentax dslr?
 
 The latest seems to be the officially deemed FAKE mid-March 2013 rumor
 that Pentax would announce the K-3 using Sony's 24mp full-frame sensor.
 Instead we got 9 bold new colors for the K-30 (which BTW was no longer
 on display at Tiger Direct during my weekly music/computer store
 pilgrimage last week).
 
 Since then, all I'm aware of is the recurring generic rumor that Pentax
 will announce a Full Frame DSLR next year.
 
 The beauty being that the the rumor will always be fresh, there is 
 always a next year...
 
 -- 
 There are two kinds of computer users those who've experienced a hard drive 
 failure, and those that will.
 
 
 
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Pentax FF DSLR is vaporware?

2013-05-18 Thread J.C. O'Connell

Seriously, what is the latest rumours about FF Pentax dslr?

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