On 5/6/12, Mark Roberts, discombobulated, unleashed:
What would be cool would
be an ND filter that went behind the reflex mirror and in front of the
sensor.
My video camera has three NDs on a wheel exactly in that place.
--
Cheers,
Cotty
___/\__
|| (O) | People, Places, Pastiche
...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of
Larry Colen
Sent: 04 June 2012 23:22
To: Pentax-Discuss Mail List
Subject: How much difference does optimizing the aperture make?
I was thinking about my quest for sharpness, and was considering trying
to do some research into what the aperture
On Jun 4, 2012, at 17:31 , J.C. O'Connell wrote:
In theory a perfect lens would be sharpest wide open, so a really good lens
would be sharpest close to wide open. If it takes 4 or 5 stops to sharpen up
a lens, its probably not that great. As for good rules of thumb, I find f5.6
or f8 to
Just remember - while all of this is mildly interesting, it doesn't
really make a lot of difference to the end result. When you're
looking at the photograph on a screen or paper, the tiny differences
are extremely hard to see.
If the differences in f-stops are that distinct in a modern lens, you
Larry Colen wrote:
I was thinking about my quest for sharpness, and was considering trying
to do some research into what the aperture sweet spot is for each lens,
and was wondering if anyone had already made a chart of them.
The sweet spot for sharpness is usually around f/5.6-f/8, depending
Less than actually getting the subject in focus does.
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From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of
Mark Roberts
(Also, sharpness
and shutter speed can be a trade-off too if you're trying to get motion
blur from long shutter speed. I run into this problem when shooting
waterfalls and such and I'm forced to stop way
On 6 June 2012 00:10, Bob W p...@web-options.com wrote:
From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of
Mark Roberts
(Also, sharpness
and shutter speed can be a trade-off too if you're trying to get motion
blur from long shutter speed. I run into this problem
Bob W wrote:
From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of
Mark Roberts
(Also, sharpness
and shutter speed can be a trade-off too if you're trying to get motion
blur from long shutter speed. I run into this problem when shooting
waterfalls and such and I'm forced
From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of
Mark Roberts
Bob W wrote:
From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf
Of Mark Roberts (Also, sharpness and shutter speed can be a trade-
off
too if you're trying to get motion blur from
Also a factor, the longer the lens, the narrower the depth of field at the same
f stop on a shorter lens.
-Original Message-
From: Mark Roberts postmas...@robertstech.com
Sent: Jun 5, 2012 9:27 AM
To: Pentax-Discuss Mail List pdml@pdml.net
Subject: Re: How much difference does optimizing
re: diffraction vs DOF
Please see Charles Nam's most reasonable *comment* in response to the
article on the following page:
http://www.theatreofnoise.com/2011/06/choosing-optimal-aperture-to-avoid.html
The problem with dealing in mathematical formula is that they are not
Real World and do not
Subject: Re: How much difference does optimizing the aperture make?
Also a factor, the longer the lens, the narrower the depth of field at the
same f stop on a shorter lens.
-Original Message-
From: Mark Roberts postmas...@robertstech.com
Sent: Jun 5, 2012 9:27 AM
To: Pentax-Discuss Mail List
I was thinking about my quest for sharpness, and was considering trying to do
some research into what the aperture sweet spot is for each lens, and was
wondering if anyone had already made a chart of them.
Then I wondered how much it really matters. I've heard a couple of stops down
from wide
On 2012-06-04 18:22, Larry Colen wrote:
Then I wondered how much it really matters. I've heard a couple of stops down from wide
open, anywhere between f/8 and f/16, and a couple other rules of thumb. I do
know that on some lenses, particularly the FA50/1.4, that stopping it down a couple
On Mon, Jun 4, 2012 at 6:22 PM, Larry Colen l...@red4est.com wrote:
optimizing aperture for
sharpness is not the most productive place to spend my time and energy.
Mark!
Apologies for taking that out of context. :-)
That I'm generally best optimizing the aperture for the picture, and not
I never really spent too much time worrying about researching the
sweet spot. I just chose the aperture that gave me the DoF I wanted.
That said, with the D800's stupidly high resolution, it really pays to
hit the sweet spot.
DS
On 5 June 2012 06:53, Bruce Walker bruce.wal...@gmail.com wrote:
If you can find the MTF charts for each lens, it will tell you all you
need to know about what aperture it is sharpest at.
On Mon, Jun 4, 2012 at 6:22 PM, Larry Colen l...@red4est.com wrote:
I was thinking about my quest for sharpness, and was considering trying to do
some research into what
Larry's ideas:
I was thinking about my quest for sharpness, and was considering
trying to do some research into what the aperture sweet spot is for
each lens, and was wondering if anyone had already made a chart of
them.
Then I wondered how much it really matters. I've heard a couple of
On 6/4/2012 6:22 PM, Larry Colen wrote:
I was thinking about my quest for sharpness, and was considering trying to do some
research into what the aperture sweet spot is for each lens, and was
wondering if anyone had already made a chart of them.
Then I wondered how much it really matters.
F/5.6 and be there.
Sent from my iPad
Jeffery L. Smith
New Orleans, Louisiana
USA
On Jun 4, 2012, at 19:05, Mark C pdml-m...@charter.net wrote:
On 6/4/2012 6:22 PM, Larry Colen wrote:
I was thinking about my quest for sharpness, and was considering trying to
do some research into what the
-
J.C.O'Connell
hifis...@gate.net
-
-Original Message-
From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of Mark
C
Sent: Monday, June 04, 2012 8:06 PM
To: Pentax-Discuss Mail List
Subject: Re: How much difference does optimizing the aperture make?
On 6/4/2012 6
The optimum aperture does make a noticeable difference in sharpness with most
good glass, but using it shouldn't overrule your DOF needs. With the K-5, you
can set your program mode to choose the MTF aperture when you push the green
button. On the new DA* zooms, it comes early -- f4 in many
Don't forget that at about f8 diffraction effects will begin to rear
it's ugly head. So if your maximum aperture is 4.0 diffraction will
start to steal sharpness using that two stops down rule of thumb. It's
worse the shorter the lens gets as the actual physical aperture is what
controls
IMO in this kind of discussion it just might be useful to play the role
of devil's advocate.
Most of my shooting not for my own pleasure is for Galia's class. When
it started I was obsessed with technical quality - sharpness, etc. As
time goes by, I am starting to understand that slightly
I personally know by memory for the prime lenses I used the most, and
out of personal experimentation in real world shooting -just because I
like to know- although P mode with MTF program will get you there
easily. For the non-chip lenses I guess a couple of clicks from wide
open.
The ones for me
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