[rollei_list] Re: DHW Rollei 35 lens
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Mon, 28 Feb 2011 11:32:16 -0300
2011/2/28 Eric Goldstein <egoldste@xxxxxxxxx>:
> So it is just what we thought initially... a means of reducing production
> costs by not paying licensing fees to Zeiss.
>
> Any chance they could supply a block diagram?
Yes Eric, since the current lens name is identical regarding the newer
AFM 35 lens I thought it could be the basis for the lens, but I was
not sure and asked DHW directly.
I have the Sonnar 2.8/40 diagram used for the Rollei 35 S and for the
several Rollei 35 models made during the Rollei Fototechnik era up to
about 2001, I'll scan it tonight or tomorrow for one of my blogs, this
is the same lens DHW is using now. Rollei had a serious problem with
the original CZ Sonnar prototype, they developed the camera prototype
without to test the lens initially trusting in the CZ quality control
and when the camera was almost ready for production, they tested it
with the lens and found the Sonnar prototype performance was poor, the
Tessar was better clearly even with the front element focusing system.
This problem delayed 1 year the 35 S production, Rollei lost money
very much and CZ needed to recalculate the lens while Rollei adapted
parts again to focus the lens as a whole; after these changes the
Sonnar performance became better than the Tessar.
Carlos
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