[rollei_list] Re: Contax on Everest
- From: Mark Rabiner <mark@xxxxxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Wed, 28 Oct 2009 01:02:44 -0400
> 2009/10/27 Jan Decher <Jan.Decher@xxxxxxx>:
>> Carlos,
>> Looks like he is using the prewar Contax II (not IIa !) with the 135mm
>> Sonnar and the rotary (440) finder.
>> Wonder if they used special lubes for high elevation/cold temperatures on
>> their cameras?
>
> Jan:
> The camera in that photograph is a Contax II with a Sonnar
> 135mm, I can't identify the auxilary viewfinder very well .
> I could talk on the Rolleis TLR lubrication mainly; these cameras are
> prepared to work with perfect lubrication up to about -30º Celsius
> respecting the factory standard specs for the purpose, they use grease
> and oil for low temperatures as standard and then a special
> lubrication for cold is not required in general, if they work perfect
> at -30º Celsius (-22º Fahrenheit) you could expect that they still
> work at lower temperatures, perhaps -35/-40º Celsius.
> Photographers- Mountaineers are recommended to keep the cameras on
> their bodies for very low temperatures before to use them, and to
> expose the camera to the external climate to shoot only, it diminishes
> even more freeze risk.
>
> In his book "Camera maintenance & repair" 2, Thomas Tomosy shows the
> way to disassemble the Contax II/III, they are complicated cameras for
> the shutter and film advance mechanisms and telemeter, they are
> lubricated from factory and according Henry Scherer they need 5 types
> of grease and 2 types of oil (Rollei TLR needs 15 types of grease and
> 2 types of oil according the factory repair manual), I guess the
> Contax lubrication is for low temperatures too, at least after the
> WWII when new and synthetic oils and greases appeared.
> BTW, you can clean the shutter and to use it without lubrication,
> Prochnow recommends it if you are a collector or if you use the camera
> rarely, the lack of grease and oil avoids a jammed shutter after a
> long time without use, but a no lubricated Compur shutter "life" will
> be reduced from 30000 to 5000 releases and similar ratio for others
> mechanical shutters.
>
> Carlos
I was wondering this morning how a Contarex bulls eye and other from that
services would do in outer space with special or no lubrication.
The lubrication of this camrea I know is quite an issue as they used an
experimental kind which kind of did the camera in after 20 years.
Mark William Rabiner
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