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EXCERPT page containing first few paragraphs. 2017-03-27 21:28:51

Leica M Monochrom

Noise Behavior with 'Push' of ISO 320 (Dolls)

The Leica MM Monochrom offers a base ISO is 320, but in the field especially as a journalistic style tool it is often the case that images are made that are underexposed and need a push.

Especially if a lens is shot wide open, optical and natural vignetting can deliver 2-3 stops less light into the corner areas. The Leica MM lens correction presumably adjusts the RAW file for this as does the M9/M9P.


This examination of “push” uses the images from the doll comparison.

The exposure was at as bright a level as possible without blowing out highlights, as per the Leica MM histogram. Furthermore, the aperture chosen for this example is ƒ5.6, so that any vignetting that remains is only natural (unavoidable) vignetting. In short, there could have been no brighter exposure possible for this scene without blowing highlights.

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Variants +0 As Shot ISO 320, +2 Push = ISO 1280 Equivalent available in full article