Habe das ganze mal kopiert, hier der erste Teil:
Time to take a deep breath, take all the information we've gathered to date, and summarise where we (Nikon, D200 customers, prospective D200 customers, and engaged observers).
Here's a summary, point by point, and hopefully I don't leave too much out (or throw too much unsupported conjecture into the pot)
Disclaimers: I am not a professional photographer, nor does my body of work in the photographic art hold a candle to the typical member of this forum. I own a D70, not a D200. I currently design print controllers for colour laser printers, I have never been involved in the design of digital cameras.
- Bob Elkind
#1. D200 banding is real
a. Nikon announcement/acknowledgment:
http://www.dpreview.com/news/0602/06021101nikond200banding.asp
Here is an example (there are many, but here is ONE):
This thread shows banding before and after (successful) repair --
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17201167
An informal poll in this site suggests the banding problem is not pervasive, or at least not to the degree of serious impairment that dissatisfaction is pervasive:
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17189606
#2 Here are some posts describing the nature, possible cause, and some solutions from this thread, you should read the entire thread if you have a few hours
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17206164 ):
a. Calibration and matching of A/D converters
part 1 -
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17208436
part 2 -
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17209905
b. A/D converter speed
excellent post by Gromsky, you should read the entire thread for excellent fact, news, and opinions -
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17219984
and
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17220911
c. Quality control and production calibration
read bottom half of this post -
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17219961
#3 Nikon's response to the problem is still developing
a. Nikon released the product apparently having full confidence in the product design and Nikon's production capabilities. It turns out that the product launch was hit-or-miss. Performance varies widely from unit to unit, suggesting a lack of production test and quality control.
b. Serious banding can be readily demonstrated and reproduced, and initial response is to recalibrate (or "tune") returned units in factory service depots.
c. It becomes apparent that service tuning is more difficult to implement than originally thought. Some serviced units see dramatic improvement, some show residual banding remaining, and some units see calibrations that result in adversely changes to colour balance and noise levels.
read this thread for details:
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17222420
and
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17206411
and
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17206441
and this post (better yet read the entire thread) -
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17221529
Here's a thread where repair went well:
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17201167
d. At least one report that reference D200 units are being distributed to service bureaus for comparison to re-worked units. This should improve the consistency of repair work done in the service bureaus, but this seems like an expedient short-term workaround while a more comprehensive and more reliable solution is being prepared.
start here:
http://forums.dpreview.com/forums/read.asp?forum=1021&message=17220629
e. Though no official announcement has yet been made, news is circulating that a more complete solution involves a design change in the A/D converters section, and will require replacing hardware modules in the cameras.
4. Open questions (and opinions) going forward (as of today)
==> see part 2!