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05-22-2008, 05:55 AM   #16
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Antidote is increasing expocorrection (+1...+2).

05-22-2008, 08:01 AM   #17
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never seen this in 6000 frames on my K10D.

yuk !

the trees (three) are amazing !

no idea what to suggest, are they all long exposures >1sec ?
05-22-2008, 08:54 AM   #18
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Yes, they all at long exposures, about 1sec and longer, but the best way to see the gradient is iso1600 (and lower, to ISO800) and aperture from f6,3 to f32. I understand that such parameters usually are not used, but...
05-22-2008, 01:52 PM   #19
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Yes, I have seen it and posted about it in the past. It has affected several of my low-light exposures, one of which was at a wedding I was shooting.

A good way to see it is to stick the lens cap on and take a shot - assuming your lens cap is sealed it will show itself right away.

BTW, my *istD, *istDS, and now my Nikon cameras do not behave this way. It is a disappointing flaw in either the sensor or something reading off the sensor.

05-22-2008, 05:08 PM   #20
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QuoteOriginally posted by carpents Quote
It is a disappointing flaw in either the sensor or something reading off the sensor.
Is it really all that disappointing if hardly anyone has seen it? And, unless I'm wrong, NR (well, technically DFS) gets rid of it. And long exposures pretty much require DFS, so I must be missing the big deal here.
05-23-2008, 04:09 AM   #21
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DFS

QuoteOriginally posted by joefru Quote
..... And, unless I'm wrong, NR (well, technically DFS) gets rid of it. And long exposures pretty much require DFS, so I must be missing the big deal here.
Hi, not familiar with this particular TLA ! What's DFS please ?
05-23-2008, 05:23 AM   #22
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QuoteOriginally posted by joefru Quote
Is it really all that disappointing if hardly anyone has seen it? And, unless I'm wrong, NR (well, technically DFS) gets rid of it. And long exposures pretty much require DFS, so I must be missing the big deal here.
It ruined a series of photos from a wedding I shot. I was disappointed, even though I hadn't identified it prior to that time. I guess the first time you lose a non-reproducible shot to it you will be disappointed, too.

And when I'm processing 600-800 shots from a session, the last thing I want to do is yet another step for removing a green/magenta gradient that shouldn't be there.
05-23-2008, 05:37 AM   #23
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QuoteOriginally posted by bladerunneruk Quote
Hi, not familiar with this particular TLA ! What's DFS please ?
Sorry! NR for noise reduction, DFS for dark frame subtraction.

TLA = technical level acronym?? (I just made that up, but it sounds good!)

05-23-2008, 06:38 AM   #24
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QuoteOriginally posted by kulmann Quote
Hi, all!
Has anybody seen the subj on K10D?
Lets see



K10D, 1s, F8, ISO1600

Left part of the frame has green, and right part has purple.
Whats up?
The green to magenta toning was first seen when pushing underexposed shots to check for the infamous banding. Seems to be related to (usually) gross underexposure and push processing. Gordon B Good noticed it w/ the VPN issue.
No good explaination of it was found but is suspected to just be a sensor and/or 22bit ADC issue......
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