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36-megapixel Nikon D800E
Zeiss ZF.2 135mm f/2 APO-Sonnar T*

Using ƒ/4 vs ƒ/2 for Isolation: City Binoculars (Nikon D800E)

Here the results at f/2 are compared to f/4, showing a high-grade result at f/2 along with a superlative result at f/4.

City Binoculars

Live View was used to focus precisely at f/2 on the indented metal just under the “eyes”. The camera tilted down slightly.

The overall characteristics involve vignetting and depth of field. Except at high resolution, sharpness is apparently not a lot different at f/2 than at f/4, but see the crops: f/2 is already at a high level, but f/4 is superb.

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