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#1
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D200 owners, pls do a test for me (and for yourselves)
Hi all,
I have had a D200 for about eight months, and while I generally love it, it has been plagued with a disturbing number of problems. First was the long banding--I believe they replaced the sensor to fix that, but afterward pixels started dying. First I had three dead pixels remapped, then two months later I found about 20 new ones, which were remapped. Now, a month later I am finding more. Has anyone else experienced anything like this? But the latest and greatest weirdness became apparent recently when I tried to do a longish exposure--about 3 minutes--of the African night sky. I was shocked to find that all four corners and the top of the frame were luminous pink--looking like light-struck film. And the whole frame was studded with scores of dead-looking pixels of different sizes in white, red and blue. But they weren't dead; at shorter exposure times they behaved normally, with more and more being "blown out" and luminescing as the exposure lengthened. There were a few at 30 secs., more at one minute, and a whole lot more at 3 mins. I didn't have the courage to test further...Likewise the pink fringing started at about 1 minute and grew progressively worse at longer exposure times. Obviously this is going back to Nikon, but I am wondering how many D200 exemplars might suffer from this kind of defect, which is not obvious in most shooting situations. If you have a D200 and the time and inclination please try this: Go in a dark room, put a body cap on to stop any light from entering at the front, and perhaps the cap on the eyepiece as well, and do a 3 minute exposure at ISO 1600. I would be interested in hearing about the results. TIA, Toby |
#2
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D200 owners, pls do a test for me (and for yourselves)
My D70s has a "long exposure noise reduction" setting - have you got this
setting in use? |
#3
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D200 owners, pls do a test for me (and for yourselves)
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#4
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D200 owners, pls do a test for me (and for yourselves)
Doug Payne wrote:
On 30/08/2006 10:39 AM, wrote: And the whole frame was studded with scores of dead-looking pixels of different sizes in white, red and blue. But they weren't dead; at shorter exposure times they behaved normally, with more and more being "blown out" and luminescing as the exposure lengthened. That's long-exposure noise, not dead pixels. Red, white and blue are not dead pixels, they are 'hot' pixels and Long Exposure NR (dark frame subtraction) eliminates them - in theory along with the pink glow. David |
#5
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D200 owners, pls do a test for me (and for yourselves)
Doug Payne wrote:
On 30/08/2006 10:39 AM, wrote: And the whole frame was studded with scores of dead-looking pixels of different sizes in white, red and blue. But they weren't dead; at shorter exposure times they behaved normally, with more and more being "blown out" and luminescing as the exposure lengthened. That's long-exposure noise, not dead pixels. OP wasn't complaining about dead pixels, OP was complaining about pink and color noise. -- Thomas T. Veldhouse Key Fingerprint: 2DB9 813F F510 82C2 E1AE 34D0 D69D 1EDC D5EC AED1 |
#6
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D200 owners, pls do a test for me (and for yourselves)
On 30/08/2006 1:46 PM, Thomas T. Veldhouse wrote:
Doug Payne wrote: On 30/08/2006 10:39 AM, wrote: And the whole frame was studded with scores of dead-looking pixels of different sizes in white, red and blue. But they weren't dead; at shorter exposure times they behaved normally, with more and more being "blown out" and luminescing as the exposure lengthened. That's long-exposure noise, not dead pixels. OP wasn't complaining about dead pixels, OP was complaining about pink and color noise. OP said this: And the whole frame was studded with scores of dead-looking pixels of different sizes in white, red and blue. Picky semantics. Get a life. |
#7
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D200 owners, pls do a test for me (and for yourselves)
Really? Bright red and blue squares exactly four pixels square?
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D200 owners, pls do a test for me (and for yourselves)
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#9
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D200 owners, pls do a test for me (and for yourselves)
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#10
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D200 owners, pls do a test for me (and for yourselves)
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