a99 and a7r2 side by side, low light

[jackdevant]

This is not a scientific test. I shot same scene in RAW with a99 + 70-200 f2.8 GII (1/250; f3.2; ISO 6400; EV comp -0.7; lens zoomed to 200mm end) and with A7RII + 300 mm f2.8 G (1/250; f3.2; ISO 4000; EV comp -0.7). I shot both photos in manual mode, auto ISO. Imported to Lightroom CC, just cropped out about the same fragment and exported. Notice that A7RII used ISO 4000 instead of a99's ISO 6400. I believe, that third-to-half stop loss in mirror causes this compensation.

 

 

Left A99; Right A7R II 

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[pilsburypie]

Massive difference in noise - A7rii is much better