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Long Exposure Noise Reduction On/Off at ISO 100, with Push, Chroma Noise Reduction (Egg-Shaped Boulder)
This test assesses noise with a 30-second exposure both with and without long exposure noise reduction (“LENR”).
Long exposure noise reduction uses dark frame subtraction, so a 30-second exposure requires a 30-second additional exposure with the shutter closed, doubling the total time.
In addition, results with Adobe Camera Raw chroma noise reduction are included to add additional useful impressions of how far the files can be taken.
Even with the 30-second exposure, the image is underexposed by about 4.5 stops (the A7R II has no means to time anything longer, with manual timing with Bulb). A 3.3 - 3.5 stop push along with a +100 shadow boost is employed, to push the file to its limits. This is a challenging case which reveals the sensor quality and perhaps even more the quality of the camera processing algorithms.
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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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