Re: [Leica] ZOOAN

[Bruce Feist <bfeist@flock.org>]

Hi, Marc et al;

One difference is that I'm using a IIIc and a screw-mount Viso II, not an M system.  Presumably that doesn't matter, though.  I hope.  The OUBLIO is definitely an OUBLIO; it is so engraved.  So, I think that the ZOOAN isn't a ZOOAN; 49mm is too long.

I measure the IIIc at 29mm thick; going out to the end of the Viso I'm at 70mm; to the end of the OUBLIO is 90mm, and to the end of the not-ZOOAN is about 138mm, and to the end of Hektor is 170mm (this is to the physical front of the lens; the frontmost element is recessed by a few mm).

When measuring a lens, how far should I measure?  To the front of the front element, or is there something else?

Bruce

> The combination, to make a 4.5/135 Hektor work on a Visoflex II, IIa, or
> III, would have to be 135mm from film plane to lens -- to make these
> calculations easy, Leitz insisted on using HONEST long-focus lenses and
> none of this short-circuit telephoto stuff which the lesser houses, such as
> Zeiss and Schneider, used.
>
> Let's try the math:
>
> body depth, M camera:                     27.8mm
> Visoflex depth, M Viso                    40.0mm
> Your adapter                              49.0mm
>         total to this point             116.8mm
> remaining depth                             8.2mm
>
> So, if your lens head sticks out more than 1/4", you're out of luck and
> have the wrong adapter.  As I recall -- without running upstairs and
> checking my 4/135 Elmar -- the Hektor lens head projects about an entire
> inch.  So you probably have an adapter which is about 15mm or 20mm too thick.
>
> Or could your problem be the OUBIO?  Are you sure this is an OUBIO?  It
> should have this, or the later catalogue number, engraved on it.