¿ø¹®:
http://www.sonyalpharumors.com/digglloyd-claims-sony-a9-patternband...
Diglloyd claims the Sony A9 has Pattern/Banding Noise at ISO 100
Digglloyd shared a worrying finding on the Sony A9 he is testing:
I noticed some unexpected streaking in an image with a good exposure at ISO 100. The red channel is overlaid with horizontal lines/streaks in 12-pixel-high bands. Pattern noise is disturbing in any case, but to have it at ISO 100 with a good exposure is a huge negative for any camera, high speed shooter or not.
I¡¯ve not seen noise this egregiously bad for years now. Possible diagnosis: the high-speed readout of the A9 sensor does not read out groups of rows evenly; there is some difference in gain between the rows. The pattern noise repeats in row groups that are 12 pixels high.
I have no way to verify his detailed test yet as you have to pay to read the full article. And I have to say I have found none such issue on the RAW files shared by DPreview and Imaging Resource.
I find it strange none of the reviewers so far has ever found any banding issue on the A9 at low ISO. My bet yet is that either he got a faulty production camera or he made some sort of setting error. I ask testers and readers to peer review this. Thanks!
If indeed his findings prove to be a general issue I am sure Sony will work to fix this very soon via the next firmware update. It¡¯s very normal that new camera may have some issues that will be fixed quickly. Don¡¯t panic yet ;)
By the way, that firmware update will likely bring S-LOG on the camera too. This is what Sony support wrote on the BHphoto Q&A page:
¿ä¾à
DiglloydÀº a9¹ÙµðÀÇ ISO 100¿¡¼ ÆÐÅϳëÀÌÁî and ¹êµù³ëÀÌÁî°¡ÀÖ´Ù°íÁÖÀåÇϸçŬ·¹ÀÓÀ»°É°íÀÖ´Ù.
±×¸®°í ¼Ò´Ï´Â BHphoto¿¡¼ a9¹Ùµð¿¡ s-logÆß¾÷ÀÇ°¡´É¼ºÀ»¾Ï½ÃÇÏ°íÀÖ´Ù.
¡Ú ½Å¶ó¸é¸Å¿î¸À´ÔÀÇ ÆËÄÚ ¾Ù¹ü ¡Ú
https://photo.popco.net/58191