D70 Moiré / Bayer vääristymä

Ja parempaa kameraa hintaluokassaan ei ole!

Tässä yksi selitys:
Aliasing (vernacularly called Moiré)

The D70 has a weak anti-alias (AA) filter which improves sharpness for 99% of photos compared to a full AA filter. 1% of the time and if you have sharp edges or repeating fine patterns like a screen window you may excite aliases. An alias on a fine repeating pattern looks like bands of color on the area of the pattern that should not be there. Sharp edges might get a little jaggy in spots, visible only at high magnification. These instances are few and far between, and only happen in situations where the frequency of a grate is close to the pitch of the CCD pixels. If this happens just zoom (or move) in or out a little and it goes away.

I'd much rather have this in the 1% to 0.1% of the images in which I can see it that the crummy noise visible in 100% of the images made on some of the more expensive cameras I mentioned at the top. Likewise, the exposure accuracy of the D70 is so superior to every other camera I've used I'd rather have aliases on 0.3% of the images than have to compensate exposure on 20% of them as I have to do on other cameras. This is not enough bother for me to try to minimize; if it was I suspect it will evaporate when the camera is set to lower resolutions and I also read if you bother with NEF that Nikon Capture has a way to make this go away, too.

Want to see this yourself? Shoot through a screen window with a pitch of about 16 threads per inch from about 9 feet with a lens set to 28mm. Remember to focus on the screen, not the subject behind it. You'll see weird bands of color through it, even on the camera's LCD preview. Now if I shot screen windows all the time I might care, but I don't. If I did care, just remember to focus on the subject, not the screen, and it goes away!

This said, once an alias (color bands) make it into your image they cannot be removed. If you photograph a lot of finely striped things like picket fences and fabrics then you may want a different camera.

http://www.kenrockwell.com/nikon/d70perf.htm#performance

Ja Nikonin selitys:
http://support.nikontech.com/cgi-bin/nikonusa.cfg/php/enduser/std_adp.php?p_sid=JcKJIjth&p_lva=10468&p_faqid=9544&p_created=1080656943&p_sp=cF9zcmNoPTEmcF9ncmlkc29ydD0mcF9yb3dfY250PTEyNyZwX3NlYXJjaF90ZXh0PSZwX3NlYXJjaF90eXBlPTMmcF9wcm9kX2x2bDE9MTkmcF9wcm9kX2x2bDI9NTYmcF9jYXRfbHZsMT1_YW55fiZwX3BhZ2U9MQ**&p_li=

Uusin firmware (1.0.1/1.0.2) löytyy täältä:
http://support.nikontech.com/cgi-bin/nikonusa.cfg/php/enduser/std_alp.php?p_sid=9lXPNjth&p_lva=9544&p_no_ct=1&p_sp=cF9zcmNoPTEmcF9ncmlkc29ydD0mcF9yb3dfY250PTEyNyZwX3NlYXJjaF90ZXh0PSZwX3NlYXJjaF90eXBlPTMmcF9wcm9kX2x2bDE9MTkmcF9wcm9kX2x2bDI9NTYmcF9jYXRfbHZsMT1_YW55fiZwX3BhZ2U9MQ**&p_li=