20D hot pixel

RichA wrote:



Some software offers a "dark frame" process to remove just the digital
pixel image from the main image. This is done especially for longer
exposures where more hot pixels might show up.
-Rich

This was more in the vein of dead or hot pixels. IMO the OEM's should have a
tool to map and fix. Esp. as they may increase over time.

Cheers,
Alan

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My 20D seems OK, zero hot pixels at ISO400 and 1/30 sec.

30 sec exposure there was one faint red spot - closer examination suggests
it is more than one pixel, also noise cancellation did not remove it. I had
the lens cap on, f32 set and shaded the eyepiece though I didn't use an
eyepiece cap.

Tentative conclusion was it was stray light - probably from the eyepeice. So
I am not worried.

I would be worried for a sub-second exposure though.

Cheers


Lester

"John Doe" wrote in message
...
At 1/60th of a second I would get it replaced. With long exposures you can
expect more, just make sure to turn on the in camera long exposure noise
reduction feature. This should help. I would also recommend something like
NeatImage to help with any other noise problems. http://www.neatimage.com,
great program.

John