> From: "Wayne Harridge" <wayne.harridge@xxxxxxxxxxxxxxxxxxx
> <mailto:wayne.harridge@xxxxxxxxxxxxxxxxxxx>>
>
> 2 concentric focussing knobs, one coarse and one fine. This would also have
> been great on the OM bellows and focussing stage.
They did that, with their set of range-specific macro lenses.
You coarse-focus with the bellows (or TET), and then fine-tune with the lens
helicoid.
Jan
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