Re: How about the new Heliar 15mm (Cosina) for 360 deg pan ?

[Willem-Jan Markerink <w.j.markerink@xxxxx>]

On  9 Feb 00 at 21:40, Sofjan@xxxxxxx wrote:

>  Now my problem . Since  Heliar is not retrofocus design the rear element 
> stick into the camera body. So i cannot mount the lens to the body via rear 
> lens cap. 
> Question. What thread is the leica screw mount ???  I know it is 39 mm but 
> what pitch ?  

Officially, *very* officially: 1/25 inch. But apart from Leica, 
everyone seems to use 1mm (which is fairly close, but the difference 
has been known to cause problems, as per Marc James Small), but for 
the application at hand this is probably irrelevant.

>  Any easier solution of getting the mounting plate cheap ?  
> Machining one out of thick metal is probably not going to be cheap. and i 
> don't think extension tube is available for leica screw mount ,Or is it ?? 

Novoflex makes an abundance of M39 adapters, M39-lens to various
camera mounts, if that can suit your project....
(as well as the other way around btw, which makes mounting *any* lens to 
*any* camera possible, by using M39 as the intermediate/mating 
system....but this only works for macro, since infinity focus is most 
likely screwed up (too much extension)) in any permutation)

For more data about camera & lens mounts, see my homepage:

http://www.a1.nl/phomepag/markerink/mainpage.htm
(or /mounts.htm directly)

--                 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]