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Forum: Pentax DSLR Discussion
01-22-2008, 03:42 AM
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hello all again,
First of all I'd like to personally thank those who thought that my
knowladge of photography basics is so poor, that I should
immediately take a few lessons from them.
Loved the arrogant style, This would naturally promote your opinions greatly in my eyes ...
A few more facts to play with:
1. With all the thousands of shots I've taken till now (11,000 in 9 months) with my K10D, with several lenses & in most daylight conditions, the camera viewed them either in preview or in browse modes as well lighten photos on screen.
2. Furthermore studying histogram for each browsed photo shows in 90 out of 100 times that they are almost perfectly balanced by exposure & light.
3. With 1 & 2 in mind, all browsing & pps programs I'm using (like PSP12, Adobe LR 1.3, Adobe PS CS2, Elements 5.0, Adobe bridge and others) tend to show all the photos as they appear here: 3-4 steps underexposed.
I always, from day 1, had to brighten my photos to a certain degree, all of them without any exceptions, with 4 different lenses from different brands, different focal length and different aperture value.
To be more specific and absolutely understood, these 2 photos attached here as examples (Thank you David vary much for your afforts to upload them to site)
were shown by camera either in preview & also in after shot view & in standard browsing modes - as very well lighten shots & with well balanced light histogram, Explicitly not as shown here ...
Maybe this might contribute something to the on going discussion ...
And again, thank you all that took the time and tried to help ...
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Forum: Pentax DSLR Discussion
01-20-2008, 11:55 PM
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Again, thanks all for willingness
& again, according to your given opinions/answers I must have explained it all wrong.
I'll try once more:
1. The original shots were taken in 2 consecutive days, without the camera
over stressing/heating itself (total of 12 shots all together)
2. I could not upload the original PEF files due to size limits, therefore I croped
a small area out of them (something like 15% or so), than manualy, using PSP12 brigthen them a bit (Well maybe more than a bit, but both with the same brightening values), Converted the files to JPG and uploaded them without any JPG compression at all, namely 100% save of the original crop.
This is the reason that when examining the EXIF data, both attached examples seem to have the the same time & date.
3. I know all about exposure compensation, and that it actualy means increasing ISO value, and I dont complain about that, nither about the fact that there's a certain amount of noise in pictures, I complain about the fact that since both shots were taken with the same camera, with almost idetincal lighting conditions, & almost the same in-camera settings there is such a major difference in noise level.
Furthermore the 2 attached examples, are only symptoms to a phenomenon that I can't explain nor control in real life shooting.
The noise level of output shots from camera vary so much, even in the same
shooting session (I just could't find more examples in such a short notice, therefore I've attached only these) and it drives me crazy !!!!:mad:
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Forum: Pentax DSLR Discussion
01-20-2008, 10:01 AM
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Thanks for your kind replies but:
1. I cannot seem to be able to upload the 10 Mbytes raw files (Each) anywhere in the internet,
that is why I've converted both to JPG & also adited them a bit...
If you can suggest where I can upload the files, even temporary,
I'd appreciate it very much.
The temporary photo you've seen momentarily, Was a trial upload,
but it failed.
2. I use the spot metering since I ususly photograph birs, which are very far away,
& mostly I crop my photos, therefore the exposed subject (The bird) occupies only
the center of the view finder, the SPOT area. The other methods of exposure
fail every time.
3. Although seem otherwise, I can assure you that light conditions during the 2 shots
were almost the same, Even more, the noise free photo used even slower
shutter speed than the noisiest one (80 instead of 125).
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Forum: Pentax DSLR Discussion
01-20-2008, 08:32 AM
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There is no problem there actually :)
On the memory card, You'll find a tiny switch,
Just push this tiny switch to the "Unlock" position
(On the contrary to the word "Lock" that should apear near the switch)
Only than slide the card into the camera.
Don't worry, Everything is alright with your card,
happens to me hundreds of times :rolleyes:
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Forum: Pentax DSLR Discussion
01-20-2008, 07:58 AM
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I've attached a couple of samples to my problem.
To eliminate the sensor over heating case,
both shots were taken on 2 consecutive days, and on both these days,
the camera took only 12 shots all together.
Both shots were taken in the same place - my back yard
& on the same lighting condition - poor light.
Both pictures were edited as such:
1. Converted from RAW to JPG
2. Brighten a bit
3. Resized to 1024 X 685 pixels
The first one is noisy as hell:
The second one is almost noise free:
I'd appreciate any suggestions you may have ...
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Forum: Pentax DSLR Discussion
01-20-2008, 03:49 AM
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Hello all,
I need an urgent advise & help:
I own the K10D & use it mainly for birding purposes, together with the SIGMA 135-400 APO tele lense.
Although the problen occurs with other lenses as well & even with
Pentax 75-300 lense, I'm only intersted in the Sigma 135-400 for now.
The noise level of photos produced by the camera, mainly in the 400 mm focal length,
are in most cases very very very noisy even under excellent conditions Ie. normal bright daylight, Iso 100, and shutter speed of 500. The noise is most noticeable on dark or shady areas in photo taken or on contrast sky or other backgrounds.
Of course I've read of such phenomenon once in many posts here & on other Pentax forums, but my case is even stranger:
There are times and cases, using the very same conditions & camera parameters (I don't even tend to change them ever !) as mantioned before,
and even in the worst cases (Low light, Iso 160, Shutter speed 60 & such) the noise level is strangly very minor or even unnoticeable at all !!!!
I can't seem to understand or to reproduce anything I may have done to cause
this phenomenon, since I always discover it after a day's shooting out in the wild,
producing as much as nearly 600-700 shots a day...
Did someone encountered such a phenomenon before ????
Either with Sigma or any lenses ???
Did someone encountered any Inconsistencies in the K10D performance or output ???
Please advise, since I can't even pinpoint that as a camera malfunction & claim it's repair according to warrenty terms ...
Thank you all ...
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