EXCERPT page containing first few paragraphs. 2019-02-23 14:27:51
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Shot with the Sony A7R in APS-C crop mode (4800 X 3200 = 15.36MP).
This aperture series shows close range performance at an approximate reproduction ratio of 1:5 (about 1/5 life size). The MTF chart tells us that performance at this distance should be very high even wide open, albeit with very limited depth of field.
The shutter vibration of the Sony A7R could have been a factor at f/2.8; the look of the details suggests some damage. A macro lens is very much like a telephoto lens in its sensitivity to vibration.
f: 2.8, 4, 5.6, 8, 11, 14
sec: 0.8, 1.6, 3.2, 6.0, 10.0, 15.0
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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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- Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.
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