[rollei_list] Re: Rollei 35 mm SLR Flange focal distance
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: "rollei_list@xxxxxxxxxxxxx" <rollei_list@xxxxxxxxxxxxx>
- Date: Tue, 9 Sep 2014 15:32:36 -0300
> Perhaps it would be necessary to clarify if Dirk needs the back focal
> distance, 44,50mm to assure a right focus for the QBM lenses with the
> adapter for Canon, or if the mechanical distance 44,67mm is enough to
> assure it or if both distances are the same for practical purposes.
> Carl Zeiss confirmed as flange distance for the QBM 44,50mm as I wrote
> yesterday and they give the back lens distance to film in their
> technical info, f.e. according the Planar 1.4/50 Contax /Yashica
> technical sheet the lens back distance "to film" is 45,50mm (there are
> no technical sheets on line for QBM lenses).
>Carlos
This is the Contax/Yashica mount Planar 1.4/50 lens technical sheet,
it could give an idea baout the way Carl Zeiss measures the 44.50mm
for the QBM:
http://www.zeiss.com/content/dam/Photography/new/pdf/en/downloadcenter/contax_yashica/planar1-4_50mm_yashica_e.pdf
Carlos
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