From: avidgamefan (avidgamefan_at_antispamdomain.not)
Date: Sat Aug 23 2003 - 11:19:36 EDT
This is just to let y'all know that the "cpixmap" program has been
updated to work with the 880 (and 990). Remember that this voids
the warrantee, could ruin your camera, etc., so I wouldn't try it
unless you really need it.
To see if you have any hot pixels, there are programs to detect
them, but that's overkill. I'd just go into Manual mode, and force
the shutter speed to be about, say, 1/30th or 1/15th of a second,
cover the lens, and shoot a blank picture. View it in a photo
editor on the computer and see if you have any really bright dots
(you'll have to zoom in and scroll around). If so, they might be
hot pixels. (Alternatively, they could just be noise, but hot
pixels are pretty consistant. To reduce noise, you should force ISO
to be 100 for these tests.) I've read that some of these detector
programs will list huge numbers of hot-pixels; I'd ignore that. If
it's not painfully obvious, it's really not a concern.
You may have more hot pixels as the camera warms up (especially with
the LCD on) and the longer the shutter speed is. This is normal,
and not a "bug". There's no point in trying to fix hot pixels if
they only appear after long exposure times -- you're always going to
have something show up. It's the short exposures where you should
be clear.
Most people probably do not have any real problems. If you do not
notice any problems with your "normal" short-exposure shots, don't
worry about it. However, if you have a big green dot in every photo
like I do, you might try it. Just remember the disclaimer! This is
an undocumented feature, and there is always some risk of ruining
your equipment with these sorts of operations.
http://e2500.narod.ru/ccd_defect_e.htm
I had to use the COM port (serial cable, which is not included with
the 880). I dunno if the USB cable works, but I doubt it, on the
880/990.
I haven't taken anything other than test photos, so I'll have to get
back to you as to how my photos look now. :-)
(I also posted about this on the 880 board, but there are also some
990 users who might be interested.)
In the meantime, I have many photos that have a green dot in them.
It is rather tedious to edit each one by hand, and doing a "dark
frame subtraction" isn't ideal (because it trades off a green dot
for a hole). I found a utility by Tawbaware, but it doesn't work as
well as I'd like. Any other utilities out there that might work
better? As a fall-back, I could just roll-my-own utility as a plug-
in for a paint program. There are some interesting utilities out
there for this sort of thing.
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