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EXCERPT page containing first few paragraphs. 2023-02-08 02:29:47

Zeiss ZM 18mm f/4 Distagon

Examples: Zeiss ZM 18/4 Distagon (Misc)

Shown here are a few examples from the Zeiss ZM 18mm f/4 Distagon taken when I first started using the M9 with its original firmware, but they are sufficient to show that the 18/4 is a very sharp lens with very high contrast— and that some kind of lens correction is needed, such as using the Coder Kit to deal with some of the vignetting.

Aperture not recorded

All apertures are “best guess” from memory— the M9 does not and cannot know the aperture at which the exposure is made. The notation ~f/8 means “f/8 or thereabouts”.


An 18mm yields a strong perspective with accompanying geometric distortion towards the corners (not an optical effect), making it a challenge to shoot. But the extremely low distortion of the 18/4 Distagon reduces true optical distortion to about as one as one can expect with an 18mm lens.

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Leica M9 + Zeiss ZM 18/4 Biogon @ ~f/11, 1/2000 sec handheld, ISO 160 +2 push

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