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Forum: Pentax K-3 III 12-17-2022, 03:39 AM  
Post your K3 iii pictures.
Posted By samir_m
Replies: 3,710
Views: 278,009
one from morning walk

Forum: Pentax K-3 III 12-04-2022, 04:55 AM  
Post your K3 iii pictures.
Posted By samir_m
Replies: 3,710
Views: 278,009
one simple picture from morning walk

Forum: Pentax DSLR Discussion 11-28-2022, 01:28 PM  
The CCD Sensor Cult. I mean Club...
Posted By samir_m
Replies: 4,655
Views: 259,670
so beautiful colors
Forum: Pentax DSLR Discussion 03-01-2009, 02:05 AM  
something puzzles me with new K20D
Posted By samir_m
Replies: 15
Views: 3,036
inspected the sensor and can not see anything strange, but then if there is some
contamination or defect it is probably not visible to a naked eye

was thinking that it might be 'atmospheric' or caused by warm air going out through
my balcony (a long shot probably)

tried some pictures indors but the problem is that at closer ranges it is hard to get camera
plane parallel to the subject and at 200mm DOF becomes an issue
maybe I'll just take a risk to be seen as a weirdo in the neighborhood and go out with tripod
to take some brick wall pics... :(
Forum: Pentax DSLR Discussion 02-28-2009, 03:51 PM  
something puzzles me with new K20D
Posted By samir_m
Replies: 15
Views: 3,036
thanks folks, appreaciate your advice

have not inspected the sensor, but will do it

do you think it would be safe to use "copper hill" method with clean ethyl alcohol on
K20D sensor? maybe it safest to send it back, had it only about a month...

regarding filters, have Sigma EX UV filter 'permanently' on FA*, tried without it and it still looks the same... :(
Forum: Pentax DSLR Discussion 02-28-2009, 01:34 PM  
something puzzles me with new K20D
Posted By samir_m
Replies: 15
Views: 3,036
thanks Herman, ok will check it again, not sure if it is clear from my previous posts, but

this is picture taken with FA* 200mm and

this one is taken with DA55-200 @ 200mm

both pictures straight out of camera no pp-ing
Forum: Pentax DSLR Discussion 02-28-2009, 01:23 PM  
something puzzles me with new K20D
Posted By samir_m
Replies: 15
Views: 3,036
you can see it as well, ok it is not just me, am still not sure how much effect this will have
in real life and real pictures, but if camera or lens(es) is somehow faulty I would like to fix it
...pixel peeper's curse ;-)

Presto: have tried with different patterns on LCD monitor from much shorter distance, but
can not see the same thing, will try with a newspaper tomorrow in daylight

pentaxmz:
that were my thoughts at first , but if it is lens smudge or fungus, how likely is to have it with
two different lenses?!? on the other hand have not seen it with FA 77mm and sigma 17-70
but honestly have not peeped that much with those two... btw cannot see any fungus,
and there are maybe two dust particles in FA*, but that should not have such effect methinks
regarding the exposure, it was camera metering, have not done any compensation and
JPEGs are straight from camera, no processing

thank you for you comments
Forum: Pentax DSLR Discussion 02-28-2009, 12:27 PM  
something puzzles me with new K20D
Posted By samir_m
Replies: 15
Views: 3,036
Hello,

just wanted to add that I think that I can see same thing with DA 55-200:


full size JPEG

what am referring to are unsharp areas that are spread across the picture with
sharper areas in between

lens defects are usually shown on one side, at corners or all across the whole frame so that
makes me believe it is not lenses, but on the other hand I am not able to detect the same
thing with 77mm limited...?

All comments and advice are appreciated,
samir
Forum: Site Suggestions and Help 02-28-2009, 12:20 PM  
Cannot start a new thread
Posted By samir_m
Replies: 4
Views: 1,378
many thanks
Forum: Site Suggestions and Help 02-28-2009, 11:06 AM  
Cannot start a new thread
Posted By samir_m
Replies: 4
Views: 1,378
Hi,

have tried twice to post a new thread in DSLR section (twice because after first
one I thought that something was wrong with it) but it does not appear
after one day. There was a message that post will be first checked by an
administrator, but by now that should be done, unless posts were deleted?

Best regards,
Samir
Forum: Pentax DSLR Discussion 02-27-2009, 05:08 AM  
something puzzles me with new K20D
Posted By samir_m
Replies: 15
Views: 3,036
Hi folks,

one of my first posts here and I hope that you can help me understand if I need
to see an optician, or if maybe what I am seeing is really there...

Last three years I have been using K100D, am very happy with it and
quite recently I bought a K20D looking for more resolution and a camera
with better ergonomics.

Today I tried some test pics with FA* 200mm and I think I am seeing a
strange "sharpness pattern" that I am not able to understand.
Please have my apologies for yet another boring brick wall picture.

If you click on this link you will see a full size out-of-camera JPEG

The picture is taken from a tripod (a sturdy one I would say) with SR disabled
and 2s timer with mirror lookup @ F8

Can you see some sort of "wavy" pattern when it comes to sharpness?

It should be noted that it is not taken through a window glass, and building
is far enough to exclude variations because of DOF.

If you do see it, do you have an explanation what could cause it?
In my view it can only be the sensor.

Have to say that I have not noticed any problems with same lens on K100D
but K20D is different animal alltogether...

Many thanks in advance for all advice,
Samir
Forum: Sold Items 07-14-2007, 01:38 PM  
For Sale - Sold: FS: (EU) Pentax K10D body
Posted By samir_m
Replies: 8
Views: 2,464
OK, my first post here and I have to be labelled as a cheapskate...
but seller sets the rules :)


will send a PM shortly
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