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EXCERPT page containing first few paragraphs. 2022-01-22 19:21:51

Zeiss Touit 50mm f/2.8M
(Sony E mount)

Focusing at High Magnification

Comments based on shooting the Lincoln Stamp series.

The lens hood generally must be removed for work approaching 1:1 because it shades the subject matter; the same is true for all relatively short focal length macro lenses. The Touit 50/2.8M is actually 34.4mm when used at 1:1.

Focusing the Touit 50/2.8M

Like all (or at least nearly all) the mirrorless camera lenses, the Touit 50/2.8 operates in “focus by wire” mode—electronic focus control in discrete steps. It appeared to be adequate for achieving peak focus in the Lincoln Stamp series.

Focusing at close range, a single tick change in focus is visibly better or worse, making one wonder if the stepping precision is adequate for truly peak focus—it seemed so, but barring meticulous testing using a focusing rail, it’s hard to be certain.

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