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Upgrade the memory of your 2020 iMac up to 128GB

Sony A7R II: In-Depth ISO series in Color and Grayscale, with RGB images, R/G/B and Grayscale Channels

Get Sony A7R II and Sony 90mm f/2.8 Macro G OSS B&H Photo.

This elaborate ISO series from ISO 50 to ISO 102400 shows the performance of the Sony A7R II in both color and grayscale. A large crop shows the color and grayscale and individual R/G/B color channels from the ProPhotoRGB color space. Perfect ETTR exposure for this comparison; field work will establish practical limits in less optimal lighting or with less optimal exposure.

Sony 90mm f/2.8 Macro G OSS ISO Series from ISO 50 to ISO 102400 (Sony A7R II)

Presented with entire-frame images up to 24 megapixels from ISO 50 to 102400, along with large crops showing color and grayscale and individual R/G/B color channels from the ProPhotoRGB color space.

Wow. Clearly the sensor in the A7R II is state of the art. Too bad that evidence of raw-file “pre cooking” can still be seen in tonal transitions, but every camera has its flaws. Still, why doesn’t Sony offer a 14-bity lossless-compressed format? Insanity.

Check out the quality of the grayscale image at ISO 25600 at the 25.8 megapixel size (6048). The image is not only slightly higher resolution, it is free of the pattern noise seen with the Leica M Monochrom Typ 246. In other words, the Sony A7R II outperforms the Leica M Monochrom Typ 246 at ISO 25600. At less than half the price and a far more versatile black and white workflow (converting color images to grayscale).

One wonders what Nikon or Pentax might do with it with a true 14-bit file that is not partly cooked as with Sony, and with the best possible electronics. Canon... why the heck is Canon still making their own inferior sensors?

Dolls
f8 @ 1/1600 sec, ISO 25600; 2015-08-06 17:12:50
Sony A7R II + Sony FE 90mm f/2.8 Macro

[low-res image for bot]

 


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