Good trial to see if you want an f/8 mirror lens?
BTW, I find mirror lenses very difficult to focus.
Paul Stenquist wrote:
I sold my 105 some time ago. I could try it with a 90. But I would
never focus any lens at f8. What's the point?
Paul
On Nov 15, 2006, at 7:49 PM, William Robb wrote:
On 15/11/06, Paul Stenquist, discombobulated, unleashed:
I jumped in recently because I'm getting tired of this shit.
Mark!
--
Cheers,
Cotty
___/\__
|| (O) | People, Places, Pastiche
||=|http://www.cottysnaps.com
_
--
PDML Pentax-Discuss
On 15/11/06, J. C. O'Connell, discombobulated, unleashed:
This is all getting to be a little too much
Mark!
--
Cheers,
Cotty
___/\__
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||=|http://www.cottysnaps.com
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If I keep the camera at a constant distance from the
subject, I agree with you. But if the subject has the
same magnifaction in the finder, I don't.
You haven't mentioned that yet in this new diatribe.
-Lon
J. C. O'Connell wrote:
I never said it was always a problem, I said its
harder to
William Robb wrote:
- Original Message -
From: Paul Stenquist
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I sold my 105 some time ago. I could try it with a 90. But I would
never focus any lens at f8. What's the point?
Whats the point of 90% of the traffic
focusing at the same DISTANCE
too in one of the earlier posts.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Lon Williamson
Sent: Thursday, November 16, 2006 6:08 AM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
William Robb wrote:
- Original Message -
From: Paul Stenquist
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I sold my 105 some time ago. I could try it with a 90
Hmmm another comment that has slipped through my filter. OK, I can't
let this pass as, iirc, JCO made this comment several times:
J. C. O'Connell wrote:
Lastly I use the zoom example
because its the easiest and fastest
way to make the comparison, changing
primes makes for a
Of course, JCO has the option to filter or not respond to posts as well ...
Shel
[Original Message]
From: keith_w
Wouldn't it be better to just filter all messages from him?
Might help maintain your sanity.
You guys keep baiting him, and then get pissed when he snaps back.
Plonk him
:22 AM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
Hmmm another comment that has slipped through my filter. OK, I
can't let this pass as, iirc, JCO made this comment several times:
J. C. O'Connell wrote:
Lastly I use the zoom example
A list is only as good as the composite of it's members. I've joined a
number of other lists recently. Frankly I'm amazed how worthwhile they are
and how next to worthless this one has recently become.
Tom C.
From: Paul Stenquist [EMAIL PROTECTED]
Reply-To: Pentax-Discuss Mail List
- Original Message -
From: Shel Belinkoff
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I don't understand what the time difference has to do with anything.
Shel, remember you are discussing theory with someone who doesn't think
the viewfinder affects focusing
I looked through the archives and saw the response ... maybe I'm dense, but
it makes no sense to me, either in context of the original post or the
context of the thread in general. I suppose I'm dense.
Shel
[Original Message]
From: William Robb
I don't understand what the time
, 2006 6:38 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
- Original Message -
From: Shel Belinkoff
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I don't understand what the time difference has to do with anything
On 14/11/06, Paul Stenquist, discombobulated, unleashed:
And who is it whose not willing to let this go? It is kind of sad.
... and who is it who's..
;-)
--
Cheers,
Cotty
___/\__
|| (O) | People, Places, Pastiche
||=|http://www.cottysnaps.com
At 04:02 PM 15/11/2006, Cotty wrote:
On 14/11/06, Paul Stenquist, discombobulated, unleashed:
And who is it whose not willing to let this go? It is kind of sad.
... and who is it who's..
looking around
...owl's???
looking around
Dave
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PDML Pentax-Discuss Mail List
On 14/11/06, J. C. O'Connell, discombobulated, unleashed:
The only sad thing is people who refuse
to accept the truth even when its staring
them straight in the face
There is more than one truth.
Words to live (and let live) by
--
Cheers,
Cotty
___/\__
|| (O) | People,
It is sad.
Both John and I are victims of Karma. He is destined to be the small
minded ideologue, unable to see that the world is a bigger place
than
his small mind can encompassed, and I, unable to stop trying
to show him
that there is more to this photography game than a hidebound
14, 2006 10:36 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
On Nov 14, 2006, at 10:06 PM, William Robb wrote:
Both John and I are victims of Karma. He is destined to be the small
minded ideologue, unable to see that the world is a bigger
PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Godfrey DiGiorgi
Sent: Tuesday, November 14, 2006 11:13 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
Are you guys still going on with this nonsense?
I thought that someone said it was no problem
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
William Robb
Sent: Tuesday, November 14, 2006 10:19 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
- Original Message -
From: David Savage
Subject: RE: Using
Two diametrically opposing contentions
cannot both be true.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Cotty
Sent: Wednesday, November 15, 2006 3:05 AM
To: pentax list
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
On 14/11
Words to live (and let live) by
--
Cheers,
Cotty
Live and Let Die - Paul McCartney
:-)
--
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PDML@pdml.net
http://pdml.net/mailman/listinfo/pdml_pdml.net
So here we are, both riding the same merry-go-round, him on one side, me
on the other.
Destined to continue goading and insulting one another for eternity.
And the rest of you trapped on gilt and satin horses, spinning around
and screaming.
William Robb
Lazurus meet Lazurus. :-) Your comments
So which of them is half black and half white? Oh, wait a minute...
Tom C wrote:
So here we are, both riding the same merry-go-round, him on one side, me
on the other.
Destined to continue goading and insulting one another for eternity.
And the rest of you trapped on gilt and satin horses,
Different episode
Tom C.
From: P. J. Alling [EMAIL PROTECTED]
Reply-To: Pentax-Discuss Mail List pdml@pdml.net
To: Pentax-Discuss Mail List pdml@pdml.net
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
Date: Wed, 15 Nov 2006 11:55:37 -0500
So which of them is half
Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of J.
C. O'Connell
Sent: 14. november 2006 21:36
To: 'Pentax-Discuss Mail List'
Subject: RE: Using a Super Tak w/ istDS- A challange to the list?
I say its EASIER to focus longer lenses
with the same accuracy at same fstop/speed
Mostly harmless (just plain Norwegian)
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of J.
C. O'Connell
Sent: 14. november 2006 21:36
To: 'Pentax-Discuss Mail List'
Subject: RE: Using a Super Tak w/ istDS- A challange to the list?
I say its EASIER to focus
On 15/11/06, Bob W, discombobulated, unleashed:
Come on, Bill, you can't throw incomplete metaphors analogies around
like that, it's not scientific.
Apparently his wife can.
--
Cheers,
Cotty
___/\__
|| (O) | People, Places, Pastiche
||=|http://www.cottysnaps.com
On 15/11/06, J. C. O'Connell, discombobulated, unleashed:
Two diametrically opposing contentions
cannot both be true.
...to a computer. Humans are not computers. Reality is subjective!!!
--
Cheers,
Cotty
___/\__
|| (O) | People, Places, Pastiche
||=|
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Cotty
Sent: 15 November 2006 20:30
To: pentax list
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
On 15/11/06, J. C. O'Connell, discombobulated, unleashed:
Two diametrically
Cotty wrote:
Reality is subjective!!!
What colour is the sky in your world?
--
Christian
--
PDML Pentax-Discuss Mail List
PDML@pdml.net
http://pdml.net/mailman/listinfo/pdml_pdml.net
Bob W wrote:
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Cotty
Sent: 15 November 2006 20:30
To: pentax list
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
On 15/11/06, J. C. O'Connell, discombobulated, unleashed:
Two
On 15/11/06, Christian, discombobulated, unleashed:
What colour is the sky in your world?
Any colour I want it to be.
--
Cheers,
Cotty
___/\__
|| (O) | People, Places, Pastiche
||=|http://www.cottysnaps.com
_
--
PDML Pentax-Discuss Mail
Not everything is subjective and this case isnt either.
My contention is purely objective.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Cotty
Sent: Wednesday, November 15, 2006 3:30 PM
To: pentax list
Subject: Re: Using a Super Tak w/ istDS
On Wed, 15 Nov 2006 21:03:56 -, Cotty [EMAIL PROTECTED] wrote:
On 15/11/06, Christian, discombobulated, unleashed:
What colour is the sky in your world?
Any colour I want it to be.
Cotty loves grey.
John
--
Using Opera's revolutionary e-mail client: http://www.opera.com/m2/
--
On Wed, 15 Nov 2006 20:39:40 -, Bob W [EMAIL PROTECTED] wrote:
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Cotty
Sent: 15 November 2006 20:30
To: pentax list
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
On 15/11/06, J
- Original Message -
From: J. C. O'Connell
Subject: RE: Using a Super Tak w/ istDS- A challange to the list?
Not everything is subjective and this case isnt either.
My contention is purely objective.
Except that you have said the difference in focusing ease between
a wider lens and
- Original Message -
From: Paul Stenquist
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I tried it with a 135/2.5 and a 35/2.0 on my *istD, both at f4. As I
suspected, it was much easier to focus the 135. Finding critical
focus on that lens was easy. The 35
I tried it with a 135/2.5 and a 35/2.0 on my *istD, both at f4. As I
suspected, it was much easier to focus the 135. Finding critical
focus on that lens was easy. The 35 appeared to be in focus at a
wide range of settings. Finding critical focus was more difficult.
But I already knew that.
to lenses, not between
two finders or cameras.
This is all getting to be a little too much
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
William Robb
Sent: Wednesday, November 15, 2006 7:20 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super
I sold my 105 some time ago. I could try it with a 90. But I would
never focus any lens at f8. What's the point?
Paul
On Nov 15, 2006, at 7:49 PM, William Robb wrote:
- Original Message -
From: Paul Stenquist
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
William Robb
Sent: Wednesday, November 15, 2006 7:49 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
- Original Message -
From: Paul Stenquist
Subject: Re
On Nov 15, 2006, at 8:00 PM, J. C. O'Connell wrote:
This is all getting to be a little too much
Mark!
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In a message dated 11/15/2006 5:13:31 PM Pacific Standard Time,
[EMAIL PROTECTED] writes:
On Nov 15, 2006, at 8:00 PM, J. C. O'Connell wrote:
This is all getting to be a little too much
Mark!
Definitely. I second that.
Mark!
Marnie aka Doe ;-)
--
PDML Pentax-Discuss Mail
First, I cannot believe that this thread is still going on.
The point, Paul, was very simple. A while back there was a discussion about
using screw mount lenses on the Pentax DSLR cameras. So, one day I had the
ST 105/2.8 handy, and the istDS was close by as well. It seemed like a
good
On Nov 15, 2006, at 8:38 PM, Shel Belinkoff wrote:
For a street shooter being able to shoot stopped down at smaller
apertures
and getting good focusing results allows for faster shooting. For
tripod
shooters, there may not be much of an advantage.
That's certainly only true if one is
It's not an argument - it's just the reason why I posted my original
message. You can scrutinize it all you want Paul ..
Focusing a ST on an istDS at open aperture is a PITA, because you then have
to manually stop it down to take the meter reading. It's nice and fast to
be able to focus at the
Just curious, Paul, how would you focus and meter using a ST on your DSLR?
Shel
[Original Message]
From: Paul Stenquist
That's certainly only true if one is using a lens that won't focus at
open aperture. A rare situation to be sure. I only jumped in here
because I sensed that this
Paul Stenquist wrote:
On Nov 15, 2006, at 8:38 PM, Shel Belinkoff wrote:
For a street shooter being able to shoot stopped down at smaller
apertures
and getting good focusing results allows for faster shooting. For
tripod
shooters, there may not be much of an advantage.
That's
I would probably never use a super tak on my *ist D. I can't think of
a single reason why I would want to do that. If I did, I'd probably
shoot at a moderate stop like 5.6 with a longer lens, like a 135,
then focus and meter at the stop. With a wide lens, such as a 35, I'd
have to focus
And now you're becoming argumentative. I put JCO in my kill file some time
ago. I don't believe I posted to this thread in a couple of days until this
evening, when I saw your message.
Shel
[Original Message]
From: Paul Stenquist
On Nov 15, 2006, at 8:38 PM, Shel Belinkoff wrote:
On Nov 15, 2006, at 8:38 PM, Shel Belinkoff wrote:
First, I cannot believe that this thread is still going on.
Nor can I. This silliness was pushed to extremes by you and Robb.
Yes, you can get a rise out of JCO in perpetuity, but we all knew
that. I jumped in recently because I'm getting
But others do - they like the lenses and they have the lenses.
Shel
[Original Message]
From: Paul Stenquist
I would probably never use a super tak on my *ist D. I can't think of
a single reason why I would want to do that.
--
PDML Pentax-Discuss Mail List
PDML@pdml.net
Bought a ST 35/3.5 yesterday off the 'bay myself. Can't wait for it to
get here.
And yes, it's going on my K100D, as well as the film bodies.
-Adam
Shel Belinkoff wrote:
But others do - they like the lenses and they have the lenses.
Shel
[Original Message]
From: Paul Stenquist
- Original Message -
From: J. C. O'Connell
Subject: RE: Using a Super Tak w/ istDS- A challange to the list?
This is all getting to be a little too much
Contend what you want, but if all you can do is spout theory without
practical knowledge, then you only know theory, and
- Original Message -
From: Paul Stenquist
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I sold my 105 some time ago. I could try it with a 90. But I would
never focus any lens at f8. What's the point?
Whats the point of 90% of the traffic on this list?
Personally,
How the hell is defending what you saw beating up someone?
Give me a friggin break, that fuckface hijacks any thread he can if he
thinks he can get and win an argument.
It's what he does with just about every thread he involves himself in,
and it puts a chill on useful discussion.
Consider the
- Original Message -
From: J. C. O'Connell
Subject: RE: Using a Super Tak w/ istDS- A challange to the list?
WR, are you saying that he 35mm lens has the
exact same ease of focusing as the 105 lens
on the its with both at F8 focusing?
They were similar enough that getting accurate
once.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
William Robb
Sent: Wednesday, November 15, 2006 11:11 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
- Original Message -
From: J. C
11:26 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
- Original Message -
From: Paul Stenquist
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I sold my 105 some time ago. I could try it with a 90. But I would
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
- Original Message -
From: J. C. O'Connell
Subject: RE: Using a Super Tak w/ istDS- A challange to the list?
This is all getting to be a little too much
Contend what you want, but if all
Stop with the fuckface comments immediately.
It only proves you lost the argument on the
issue and makes you look like the even worse
loser that you are.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
William Robb
Sent: Wednesday, November 15, 2006
contending all along.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
William Robb
Sent: Monday, November 13, 2006 11:38 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
- Original Message -
From
: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Christian
Sent: Tuesday, November 14, 2006 9:25 AM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
Cory Papenfuss wrote:
Anyone trying to argue otherwise (e.g. Will Robb) is either
Cotty wrote:
On 13/11/06, Paul Stenquist, discombobulated, unleashed:
You're correct on this JCO. Bill Robb is bating you. Ignore him and
he'll stop.
Paul, stop bating Bill ;-)
Cotty, apologize immediately for baiting Paul. :-)
--
Christian
http://photography.skofteland.net
--
You're correct on this JCO. Bill Robb is bating you. Ignore him and
he'll stop.
Paul, stop bating Bill ;-)
Cotty, apologize immediately for baiting Paul. :-)
You fell for that hook, line and sinker.
--
PDML Pentax-Discuss Mail List
PDML@pdml.net
And this entire stream of crap has been baiting me. I can hardly contain
myself. Someone, about a thousand posts ago, said he'd been using lenses
for 30 years -- was it JCO? Well, I've been using them for a hell of a
lot longer than that and still can't focus the goddamn things. I have
more
On Nov 14, 2006, at 7:09 AM, Cotty wrote:
You're correct on this JCO. Bill Robb is bating you. Ignore him and
he'll stop.
Paul, stop bating Bill ;-)
Cotty, apologize immediately for baiting Paul. :-)
You fell for that hook, line and sinker.
Let's see if Cotty can worm his way
- Original Message -
From: Shel Belinkoff
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I'd have to disagree with you ... truth is sometimes only opinion, and
facts can often be skewed to reflect or create whatever truth is
desired.
History is filled with facts
You're correct on this JCO. Bill Robb is bating you. Ignore him and
he'll stop.
Paul
Agreed.
Everything else being equal (aperture, contrast, resolution,
helical gear cut, etc), a longer focal length (e.g. 105mm) will have a
higher focusing sensitivity than a wide angle
Cory Papenfuss wrote:
Anyone trying to argue otherwise (e.g. Will Robb) is either
ignoring one or more of these factors, or using the personal opinion
argument, to which there is no refute.
Bill is using the personal experience argument. Conduct an experiment
and evaluate the
From: Paul Stenquist [EMAIL PROTECTED]
Date: 2006/11/14 Tue PM 01:09:51 GMT
To: Pentax-Discuss Mail List pdml@pdml.net
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
On Nov 14, 2006, at 7:09 AM, Cotty wrote:
You're correct on this JCO. Bill Robb is bating
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
No one is arguing this point. All Bill and I said is that we found it
just as easy to focus a particular wide lens as a particular long lens
on the D and the DS, physics and science notwithstanding. It was after
that that someone said
ANYWHERE within the DOF at the
shooting aperture.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Don Williams
Sent: Tuesday, November 14, 2006 6:59 AM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list
No one is arguing this point. All Bill and I said is that we found it just
as easy to focus a particular wide lens as a particular long lens on the D
and the DS, physics and science notwithstanding. It was after that that
someone said we were liars and that we were mistaken, etc. The thing is,
has either. ( I asked ).
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Shel Belinkoff
Sent: Tuesday, November 14, 2006 10:02 AM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
No one is arguing
Perhaps those of you relying on science and physics should pick up a couple
of appropriate lenses, stick 'em on your istD or istDS, and see what your
results are instead of quoting the laws of physics, which you did with a
large list of qualifiers.
Shel
I trust physics and
There is always truth. You can skew facts to hide the truth, but that
doesn't change it. Some truths are unknowable but that doesn't mean
they aren't there, and these truths are open to debate, that debate
always comes down belief or opinion. The problem comes when the
knowable truths and
Anyone trying to argue otherwise (e.g. Will Robb) is either
ignoring one or more of these factors, or using the personal opinion
argument, to which there is no refute.
Bill is using the personal experience argument. Conduct an experiment
and evaluate the results. This is very
All the worlds a tiny bubble
Floating inside
Those of us who notice are
Expected to hide
All the worlds a tiny bubble
Floating inside the truth
Paul McCartney - Tiny Bubble
From: P. J. Alling [EMAIL PROTECTED]
Reply-To: Pentax-Discuss Mail List pdml@pdml.net
To: Pentax-Discuss Mail List
On Tue, Nov 14, 2006 at 08:25:52AM -0500, Cory Papenfuss wrote:
You're correct on this JCO. Bill Robb is bating you. Ignore him and
he'll stop.
Paul
Agreed.
Everything else being equal (aperture, contrast, resolution,
helical gear cut, etc), a longer focal length
PROTECTED] On Behalf Of
Cory Papenfuss
Sent: Tuesday, November 14, 2006 12:00 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
Perhaps those of you relying on science and physics should pick up a
couple of appropriate lenses, stick 'em on your istD
John,
There was no original contention. What started all this was my comment
that I found the ST 105/2.8 easy to focus when stopped down to f8.0 when
used with the istDS. It was just a simple comment reporting my personal
experience with a specific lens on a particular camera, and my pleasure
] [mailto:[EMAIL PROTECTED] On Behalf Of
John Francis
Sent: Tuesday, November 14, 2006 12:37 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
On Tue, Nov 14, 2006 at 08:25:52AM -0500, Cory Papenfuss wrote:
You're correct on this JCO. Bill Robb
Shel,
I'll note that focusing with SLR's and RF's is quite different. RF's
lose focusing accuracy with longer/faster lenses (Where this happens
depends on the effective RF baseline length) while SLR's lose focusing
accuracy with slow/wide lenses. Experience with focusing a Leica M lens
does
So, how does one measure ease of focusing in a lab? How does one measure
comparative ease of focusing (say a 35mm lens v a 105mm lens)? What tests
are used, what equipment is used? How do you define ease? Is the lens
tested on a camera, or is the camera something that gets in the way of an
Neither Bill nor I contended that our experience would be true for other
lenses, other situations, other cameras, nor were we trying to refute the
laws of physics. However, JCO, and now Mr Papenfuss, Ph.D., PPSEL-IA,
claim that longer lenses are always easier to focus, although Mr Papenfuss
Yes, I know that - however, JCO and others did not differentiate between RF
lenses and SLR lenses. They made blanket statements. My comment was
intended to show that there are enough variables that a blanket statement
is foolish.
Shel
[Original Message]
From: Adam Maas [EMAIL PROTECTED]
So, how does one measure ease of focusing in a lab? How does one measure
comparative ease of focusing (say a 35mm lens v a 105mm lens)? What tests
are used, what equipment is used? How do you define ease? Is the lens
tested on a camera, or is the camera something that gets in the way of an
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Shel Belinkoff
Sent: Tuesday, November 14, 2006 1:52 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
John,
There was no original contention. What started all
Tom C wrote:
All the worlds a tiny bubble
Floating inside
Those of us who notice are
Expected to hide
All the worlds a tiny bubble
Floating inside the truth
Paul McCartney - Tiny Bubble
And crawling on the planet's face
Some insects called the human race
Lost in time, lost in space
camera
too for your tests.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Shel Belinkoff
Sent: Tuesday, November 14, 2006 2:39 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
Yes, I know that - however
: Using a Super Tak w/ istDS- A challange to the list?
So, how does one measure ease of focusing in a lab? How does one
measure comparative ease of focusing (say a 35mm lens v a 105mm lens)?
What tests are used, what equipment is used? How do you define
ease? Is the lens tested
On Tue, 14 Nov 2006, J. C. O'Connell wrote:
I say its EASIER to focus longer lenses
with the same accuracy at same fstop/speed, all
else being equal.
jco
OK. Your opinion on the matter has been noted. Everyone else
gets to have theirs as well though, too.
-Cory
--
being equal.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of
Cory Papenfuss
Sent: Tuesday, November 14, 2006 2:46 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
So, how does one measure ease
This is a problem of definition jco is speaking of critical focus, and
is correct in that context. Others are speaking of relative or
acceptable focus and are correct in that particular frame of reference.
Both sides are talking past each other, either willfully or otherwise
ignoring the
, 2006 4:08 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I think party of the confusion here is in regard to what constitutes
critical focus and what might fall within the depth of field of a
given lens. Every lens, no matter how wide has only
is what I am talking about all
along.
jco
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of
Paul Stenquist
Sent: Tuesday, November 14, 2006 4:08 PM
To: Pentax-Discuss Mail List
Subject: Re: Using a Super Tak w/ istDS- A challange to the list?
I
This is a problem of definition jco is speaking of critical focus, and
is correct in that context. Others are speaking of relative or
acceptable focus and are correct in that particular frame of reference.
Both sides are talking past each other, either willfully or otherwise
ignoring
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