On Sun, Mar 23, 2008 at 12:24 AM, Godfrey DiGiorgi [EMAIL PROTECTED] wrote:
On Mar 22, 2008, at 9:03 PM, Christine Aguila wrote:
I'm not sure that this new focus test capabiliyt is really a
blessing. It may be a curse.
After seeing what the K20D does with high ISOs plus all the other
I understand your frustration, Joseph. But I think that even parfocal
zoom lenses (as opposed to varifocal ones) don't focus the same at all
focal lengths. Expecting them to be perfect, even the high end ones, is
putting to much faith on technology.
On the other hand, no AF system is perfect.
You don't have to do the focus tests. If you leave them all at zero,
you have the same basic setup as the K10D. But the tests and
adjustments can be helpful with some lenses.
Paul
On Mar 23, 2008, at 12:03 AM, Christine Aguila wrote:
- Original Message -
From: Paul Stenquist [EMAIL
William Robb wrote:
Joe, I think you ran the test backwards. Depth of field is not the
issue, depth of focus is. As focal length extends, depth of field
decreases, but depth of focus increases. Try calibrating your 50-135 at
50mm, and then see how it does at the long end. I am starting to
I don't test my zooms at every focal length. I tried that on the
12-24, and it drove me crazy. I set them to be right on at the
lengths I use most of ten. The scale of focal point adjustment on the
K20D is very fine. A bit of variation doesn't seem to be a problem in
the real world of
Yesterday I ordered the K20D locally :-)
Really looking forward to get to know this new tool, but I have also
been having the same dilemma. I can see myself fiddling back and forth
with the AF tuning facilities for ever. Just pixel peeping, instead of
making photographs. I have a friend who has
- Original Message -
From: Christine Aguila
Subject: Re: Frustrated With AF Problems
Yikes! I heard about the tilted sensor, but I just always assumed it was my
poor technique. But I will say I'm getting a bit better. Still, maybe I
should get this checked out. Thanks. Cheers
I am still wondering about sample variation. If different 50 mm lenses
need different adjustments, then the factory couldn't really do it. Are
folks making adjustments that are on a smaller scale then the errors in,
let's say, the MZ-S?
Steven Desjardins
Department of Chemistry
Washington and
Ok, good to know this. Thanks, Paul. Cheers, Christine
- Original Message -
From: Paul Stenquist [EMAIL PROTECTED]
To: Pentax-Discuss Mail List pdml@pdml.net
Sent: Sunday, March 23, 2008 7:20 AM
Subject: Re: Frustrated With AF Problems
You don't have to do the focus tests. If you
Excellent! Thanks so much, William. I'll do it. Big thanks cheers,
Christine
- Original Message -
From: William Robb [EMAIL PROTECTED]
To: Pentax-Discuss Mail List pdml@pdml.net
Sent: Sunday, March 23, 2008 10:41 AM
Subject: Re: Frustrated With AF Problems
Ansel Adams mentioned
One step is a very small adjustment. Probably significantly smaller
than the errors you would get just from the variation in flatness of
film.
Paul
On Mar 23, 2008, at 12:01 PM, Steve Desjardins wrote:
I am still wondering about sample variation. If different 50 mm
lenses
need different
On Sun, Mar 23, 2008 at 11:41 AM, William Robb [EMAIL PROTECTED] wrote:
Ansel Adams mentioned a fairly common visual syndrome that effectively keeps
the person
afflicted from holding a camera level. I don't recall more than that about
it than that.
To check to see if your sensor isn't
I don't test mine at all. I just let the camera focus them, and
correct it when the focus isn't what I want. That's what the focusing
ring is for...
Saves a lot of angst and time. :-)
G
On Mar 23, 2008, at 5:29 AM, Paul Stenquist wrote:
I don't test my zooms at every focal length ...
--
Just to refresh everyone's memory:
My defective DA* 16-50 is ready to go to Pentax to correct the fact that
it won't autofocus to infinity at 16 mm on the K20D. The K20D has to go
with it.
Before sending them off I thought I would check the focus asjustment of
the DA* 50-135. I tested
But its worth doing a quick test with the K20D. I never tested a lens
prior to shooting with that camera. But I was able to make a valuable
correction for at least one of my lenses -- the FA 50/1.4.
On Mar 23, 2008, at 1:21 PM, Godfrey DiGiorgi wrote:
I don't test mine at all. I just let the
Yes, but, if it looks focused, but it actually is not,
Dave
On Sun, Mar 23, 2008 at 1:21 PM, Godfrey DiGiorgi [EMAIL PROTECTED] wrote:
I don't test mine at all. I just let the camera focus them, and
correct it when the focus isn't what I want. That's what the focusing
ring is for...
On Sun, Mar 23, 2008 at 9:21 AM, Tim Øsleby [EMAIL PROTECTED] wrote:
Yesterday I ordered the K20D locally :-)
Really looking forward to get to know this new tool, but I have also
been having the same dilemma. I can see myself fiddling back and forth
with the AF tuning facilities for ever.
Any SLR which behaves like this is broken. Have it fixed.
G
On Mar 23, 2008, at 11:48 AM, David J Brooks wrote:
Yes, but, if it looks focused, but it actually is not,
On Sun, Mar 23, 2008 at 1:21 PM, Godfrey DiGiorgi [EMAIL PROTECTED]
wrote:
I don't test mine at all. I just let the camera
David J Brooks wrote:
On Sun, Mar 23, 2008 at 1:21 PM, Godfrey DiGiorgi [EMAIL PROTECTED] wrote:
I don't test mine at all. I just let the camera focus them, and
correct it when the focus isn't what I want. That's what the focusing
ring is for...
Saves a lot of angst and time. :-)
Its gone back to Pentax Canada. Just waiting now.
Dave
On Sun, Mar 23, 2008 at 3:08 PM, Godfrey DiGiorgi [EMAIL PROTECTED] wrote:
Any SLR which behaves like this is broken. Have it fixed.
G
On Mar 23, 2008, at 11:48 AM, David J Brooks wrote:
Yes, but, if it looks focused, but it
On Sun, Mar 23, 2008 at 3:16 PM, Mark Roberts [EMAIL PROTECTED] wrote:
David J Brooks wrote:
On Sun, Mar 23, 2008 at 1:21 PM, Godfrey DiGiorgi [EMAIL PROTECTED]
wrote:
I don't test mine at all. I just let the camera focus them, and
correct it when the focus isn't what I want.
My defective DA* 16-50 is ready to go to Pentax to correct the fact that
it won't autofocus to infinity at 16 mm on the K20D. The K20D has to go
with it.
Before sending them off I thought I would check the focus asjustment of
the DA* 50-135. I tested it at 135 mm, figuring that the most
- Original Message -
From: Joseph Tainter
Subject: Frustrated With AF Problems
My defective DA* 16-50 is ready to go to Pentax to correct the fact that
it won't autofocus to infinity at 16 mm on the K20D. The K20D has to go
with it.
Before sending them off I thought I would check
Joe, I think you ran the test backwards. Depth of field is not the
issue, depth of focus is. As focal length extends, depth of field
decreases, but depth of focus increases. Try calibrating your 50-135 at
50mm, and then see how it does at the long end. I am starting to think
that my long time
Joe. I'm nipping a smooth VSOP here, so my I don't trust my own judgement 100%.
But I just had a read up at Depht of of Focus and Depht f Field at
Wikipedia. And it seems that Bills advise could be worth lisening to
here. No harm in trying a different approach, is it? Judging from my
read up, he
Joe. I'm nipping a smooth VSOP here, so my I don't trust my own
judgement 100%.
But I just had a read up at Depht of of Focus and Depht f Field at
Wikipedia. And it seems that Bills advise could be worth lisening to
here. No harm in trying a different approach, is it? Judging from my
read up, he
On Sun, Mar 23, 2008 at 10:18 AM, Tim Øsleby [EMAIL PROTECTED] wrote:
Joe. I'm nipping a smooth VSOP here, so my I don't trust my own judgement
100%.
But I just had a read up at Depht of of Focus and Depht f Field at
Wikipedia. And it seems that Bills advise could be worth lisening to
I think it means that you are testing too much and not taking enough
pics. I also think that your problems may be a symptom of having to
be first on the block. My DA* 50-135 focuses perfectly with my K20D
at both 50mm and 135mm. I did adjust it. I think the number was -1 or
thereabouts.
- Original Message -
From: Tim Øsleby
Subject: Re: Frustrated With AF Problems
Joe. I'm nipping a smooth VSOP here,
My dad always said that was short for Very Special Old Poop
William Robb
--
PDML Pentax-Discuss Mail List
PDML@pdml.net
http://pdml.net/mailman/listinfo
- Original Message -
From: Joseph Tainter
Subject: Re: Frustrated With AF Problems
Joe, I think you ran the test backwards. Depth of field is not the
issue, depth of focus is. As focal length extends, depth of field
decreases, but depth of focus increases. Try calibrating your 50
- Original Message -
From: Paul Stenquist
Subject: Re: Frustrated With AF Problems
I think it means that you are testing too much and not taking enough
pics. I also think that your problems may be a symptom of having to
be first on the block. My DA* 50-135 focuses perfectly with my
Having said that, I really think Joe should humour us and retest his
lens at the short focal length and see if his pictures aren't acceptable
at the long end.
Okay, I'll see how I feel in the morning.
I don't follow the reasoning about the short focal length, but I'm sure
there are still
It will at least be informative.
By the way, I apologize for being glib in regard to this. My DA 12-25
varies greatly from one end to the next. But it still takes nice
pics. I'm not sure that this new focus test capabiliyt is really a
blessing. It may be a curse.
Paul
On Mar 22, 2008, at
- Original Message -
From: Paul Stenquist [EMAIL PROTECTED]
I'm not sure that this new focus test capabiliyt is really a
blessing. It may be a curse.
After seeing what the K20D does with high ISOs plus all the other new
features, I have to admit I desire this camera--but having
On Sun, Mar 23, 2008 at 1:03 PM, Christine Aguila
[EMAIL PROTECTED] wrote:
- Original Message -
From: Paul Stenquist [EMAIL PROTECTED]
I'm not sure that this new focus test capabiliyt is really a
blessing. It may be a curse.
After seeing what the K20D does with high ISOs
Message -
From: David Savage [EMAIL PROTECTED]
To: Pentax-Discuss Mail List pdml@pdml.net
Sent: Saturday, March 22, 2008 11:08 PM
Subject: Re: Frustrated With AF Problems
On Sun, Mar 23, 2008 at 1:03 PM, Christine Aguila
[EMAIL PROTECTED] wrote:
- Original Message -
From: Paul
On Mar 22, 2008, at 9:03 PM, Christine Aguila wrote:
I'm not sure that this new focus test capabiliyt is really a
blessing. It may be a curse.
After seeing what the K20D does with high ISOs plus all the other new
features, I have to admit I desire this camera--but having read all
the
G'day Christine
Just the supplied focus screen.
I have a natural tenancy to slope my shots too, but if I remember to
pay attention I can get it level :-)
Also you maybe one of the unlucky ones that have tilted sensor :-/
Cheers,
Dave
On Sun, Mar 23, 2008 at 1:21 PM, Christine Aguila
[EMAIL
Mail List pdml@pdml.net
Sent: Saturday, March 22, 2008 11:31 PM
Subject: Re: Frustrated With AF Problems
G'day Christine
Just the supplied focus screen.
I have a natural tenancy to slope my shots too, but if I remember to
pay attention I can get it level :-)
Also you maybe one
- Original Message -
From: Godfrey DiGiorgi [EMAIL PROTECTED]
Ya know, maybe Leica was right. They never put auto focus on their M
or R cameras. When the focus is off, it's not their fault. And no one
can complain about how fast the cameras focus either.
Godfrey
Ya know, point
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