|
Forum: Pentax DSLR Discussion
09-15-2006, 03:39 PM
|
| |
Just want to thank you all again for your suggestions.
I have downloaded Flameout and tried to use it to fix the white dots, but it didn't work either. I have again taken a series of lens cap/total darkness pictures at ISO 200 - 1600 in RAW format. I converted them to Tiff files to run them through deadpixeltest. The program did not find any dead pixels and only identifed a max of 6 hot pixels in two of the exposures (400 and 1600 ISO), virtually the same result as with the earlier test pictures taken in Jpeg format. The hot pixels it identified are not in the same place where the white dots are showing up on my images, and as mentioned, there are now at least two dozen per image, not just 6. The white dots are in the same position regardless of which lens I use on the camera.
I still have not had a response to this issue from Pentax. I will be sending the camera to Pentax for repair. If I ever find out what the problem was, I will certainly report it in the forum.
Any suggestions how to ease my withdrawal sypmtoms from not having my camera attached to my hip every day while it is at the shop? lol:D
|
|
Forum: Pentax DSLR Discussion
09-14-2006, 03:29 PM
|
| |
Okay, I downloaded the dead/hot pixel program. I shot four pictures, ISO 200, 400, 800 and 1600 in Jpeg format, even though that is not recommended. I cannot shoot tiff, and the test program does not recognize pentax raw image data. There were no dead or hot pixels at 200 ISO/30 second exposure. At the 400 and 800 it recorded 6 hot pixels, 0 dead pixels. Aat 1600 ISO 0/0 for both. I could only see them myself in irfanview viewer program in two of the test pictures.
Also, they are not in the same place that the white dots occur in my other scenery photographs.
Annette
|
|
Forum: Pentax DSLR Discussion
09-14-2006, 03:05 PM
|
| |
hi again Tracy,
I will try your test with noise reduction on and off. I will also try the link you suggested. I tried a program 'hotpixels' today to remove them, but found it didn't work at all.
I have been reading up as much as I can on other forums and each is suggesting hot pixels, and says all cameras have them, some more than others. I am awaiting a reply from Pentax regarding sending the camera in for repairs. If it was only a few white dots, I could live with it, and fix in photoshop. However, there are far too many to fix without compromising the quality of the proof which I cannot afford to happen.
thanks again and I will let you know how the test turned out.
Annette
|
|
Forum: Pentax DSLR Discussion
09-14-2006, 02:31 PM
|
| |
Thanks for the reply Tracy. I held each exposure with the lens cap on between 8 to 10 seconds. None of the black shots show any white dots, only when shooting against a blue sky, background, etc. I also just blew dust off the CCD and tried again, but the dots are still there and in the same place.
|
|
Forum: Pentax DSLR Discussion
09-14-2006, 01:17 PM
|
| |
I purchased the Pentax ist DL May 7 of this year and love it. Lately my pictures are covered in little white dots, only noticable at high resolution and usually only against a blue background, like sky, etc. At first there were only a few dots, which are always in the same place on all pictures. I thought this started happening about a month after I bought the camera, but checked the first pictures I took and they are on them as well, but only a few. Now there are at least a couple of dozen. If you blow up the pictures, the dots appear as plus signs. I have cleaned the lens and filter to no avail. I read the post about hot pixels, but do not beleive it is the same issue. I have attached a test pic shot against the side of a blue vehicle. The white dots are visible througout. I tried the same shot in manual focus, 200 ISO against the lens cap, but there weren't any dots. I have also disabled the noise reduction and tried several pictures and all show the same white dots.
I wrote to Pentax tech support this morning, but as yet have not had a response to my query.
help, they are ruining my pictures.
Any suggestions.
thank you
A
|
