Please Share Your Experiences With Hot Pixel Tests

[leonid]

Today I did some hot pixels tests with my newly bought Digital Rebel. I took two shots at ISO100, one at 30" another at 1" with black lens cap and eyepiece on. I used RAW format converted to 16-bit TIF using Canons File Viewer Utility. Then I tested the TIF files with DeadPixelTest.exe found on http://www.starzen.com/imaging/deadpixeltest.htmm which was recommended on this forum. I set up a threshold for Hot pixels to 30.

- At 1" I've got only 1 hot pixel with a luminance 30 or greater.
- At 30" I've got 24 hot pixels with a luminance 30 or greater. 6 pixels had luminance 60 or greater. The pixels were not random, but grouped in 3 "spots". One spot had 13 pixels grouped together. I am afraid to think what would happen at exposures of 15-20 minutes. I can't test it now, because I don't have my remote yet.

By searching Internet and this forum I found out, that it's virtually impossible to get a camera without hot pixels. I have an option to exchange or even get a full refund for the camera within 30 days. But I don't want to end up with something worse, that I have now. Could you please share your experiences with hot pixel tests? What I am hoping to find out is what is the reasonable expectation for hot pixels from this type of camera.

Thanks in advance.

[sdommin]

By searching Internet and this forum I found out, that it's virtually impossible to get a camera without hot pixels.

If you go looking for hot pixels, you will most surely find them.

[Steven M. Anthony]

I've done a fair number of 30 sec exposures lately and have found between 5 and 10 hot pixels (it's the same number each time, I just can't remember the exact number). At least I think they are hot pixels--they show up as a single red or blue dot. No clumbs--all spread out. I wasn't conducting a test, though, so maybe I have more.

My feeling is that they are easy enough to clean up--and I don't take 30 second exposures that often!

[leonid]

If you go looking for hot pixels, you will most surely find them.

I am looking for the information about at the minimal number of hot pixels, which is reasonable to expect from Canon’s 6MP CMOS.