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Sony A7R

Sony A7R: ISO Series (Real World, Creek)

How does the A7R perform under real-world lighting? Regrettably the light failed and its A7 sibling could not be evaluated here.

Prelude

I often shoot in shade or at dusk where the light can be very blue. While most any camera can deliver high quality results at higher ISOs under daylight-balanced studio lighting (or daylight), the real test is what a camera can do under field conditions with light that is not optimal. That is what interests your author for noise behavior, not what a perfect-conditions exposure in the lab shows: almost by definition I would be using high ISO under imperfect and often oddball lighting (in spectral terms). Those conditions really put the sensor and electronics to the test as they stray into the electronic dark alleys of imaging performance.

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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

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  • Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.

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