My M42 Lenses on the Fotodiox Pronto Autofocus Adapter

In this article its all about the compability of my M42 lenses to the Fotodiox Pronto (Techart PRO AF) adapter.

As the autofocus works with all lenses, better when its brigt worse when its darker, this article is about if the 4,5mm focusway is enough. (More Info about the adapter)

The test was done with this setup:

Sony Alpha 7RII + Fotodiox Pronto + Fotodiox M42 auf Leica M + M42 Lens

 

Lens
Needs manual prefocus?
prefocus steps
additional info

Carl Zeiss Flektogon
20mm f2,8

no

0

none
Helios 44-2
58mm f2
(Frontmod)
yes 2 Only works with the center AF spot
Carl Zeiss Flektogon
35mm f2,8
(Frontmod)
yes 3 Only works with the center AF spot
Zenitar Fisheye
16mm f2,8
no 0 none
Meyer Optik Görlitz
Primoplan
58mm f1,9
yes 2 none
Exaktar
55mm f1,4
yes 2 none
Meyer Optik Görlitz
Trioplan
100mm f2,8
yes 4 none

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