[rollei_list] Re: ...Rolleikin
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 20 Apr 2010 00:28:55 -0300
And to give even more precision for the auxilliary mirror
introduction, it's necessary to distinguish between the Original
Rolleiflex models and the Standard models. The original or first
Rolleiflex and variants, as I wrote, had an auxilliary 45 º mirror to
reflect the ground glass image at eye level similar regarding later
models (PR 051 page 172 Report 1 and cameras description). Rolleiflex
Standard models had a different auxilliary mirror, it was a little
mirror at the middle of the Sportsfinder that worked in conjunction
with the photographer eye, it did not reflect the ground glass like
the previous models auxilliary mirrors. The new Rolleicord camera in
1933 with the new viewfinder hood design re-introduced the 45º
auxilliary mirror that reflected the ground glass image like the
Original models and marking a difference regarding the Rolleiflex
Standard manufactured simultaneously. The Automat adopted the 1933
'cord viewfinder hood in 1937.
The pre-war Rolleicords kept the auxilliary mirror, the post-war
models from III lost it, it was kept for the 'flex models only.
Carlos
2010/4/19 CarlosMFreaza <cmfreaza@xxxxxxxxx>:
> 2010/4/19 Richard Knoppow <dickburk@xxxxxxxxxxxxx>:
>> Well, that's the difference between the old fixed hood and the later
>> replacable hood. My Rolleicord is a very simple camera, which is one of its
>> virtues. The curious thing is that the auxilliary mirror in the finder
>> started in the early Rolleicord and was adopted for the first Rollieflex
>> Automat.
>
> In 1956 Reinhold Heidecke decided that the TLR needed an
> interchangeable viewfinder hood, two teams developed two different
> prototypes, one of the teams headed by Heidecke and the other by
> Richard Weiss. Heidecke's prototype worked fine, it was patented in
> January 1957 and it was the last Heidecke patent, however this hood
> was complex too much, it had folds like a paper ship; in the other
> hand Richard Weiss prototype was simpler and very practical, a
> "brilliant" design according opinions at the time, Heidecke decided to
> manufacture Richard Weiss prototype and it was the basis for the
> Rollei TLR viewfinder hoods from 1958, Weiss design was patented in
> 1959.
>
> Rolleiflexes had the secondary or auxilliary mirror from the
> beginning, the first Rolleiflex had it;however the 1933 Rolleicord was
> the first Rollei TLR to use the new design viewfinder hood (without
> visible external hinges) that with variants was manufactured up to
> 1958, this design was used for the Automat in 1937, five years later.
> The Rolleicord 1933 also was the first Rollei TLR to use the focusing
> cam drive and the first to use the automatic parallax correction,
> applied to the 'flex in 1937.
> I agree with you about the 'cord IV, its simplicity is one of its virtues.
>
> Carlos
>
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