[LRflex] Re: LRflex] Re: Adaptall-2 Lens on a Leica R4

More generally speaking, even if you can cam the thing
so it doesn't flash in P or T, there is still another
problem. The aperture has to close down at the same
rate on all lenses made for that camera. Most of the
more astute manyufacturers had a standard rate for
mopst or allof their lenses IE: Nikon Contarex,
Leicaflex. But some camera and lensmakers didn't. If
you come across a lens that doesn't you can cam it so
it will allow you full aperture metering if the f
stops on the aperture ring are spaced properly but
when it comes to shutter preferred or programme, the
lens will be closed down to an aperture other than
that mandated by the camera unl;ess the aperture
actuator travels with the aperture ring! For me it's
not a problem since I rarely use P ot T on an R! Most
of the 3rd party mfgs for R did space the f stops
properly on the ring, but only the ones that
introduced their mounts after the R4 would have the
same rate of travel on the actuator.
Now I've done it. I feel dizzy!
Javier

--- NATSTEK@xxxxxxx wrote:

> Hey Guys,
> Let me add my two cents worth to this discussion.
> 
> I've used Tamron adaptall & adaptall 2 mounts in the
> Leica R4 mounts several 
> times in the last 20 years and I can definitely tell
> you that there IS A GREAT 
> DIFFERENCE in the mounts. Some will work with R4 &
> up to R7's BUT, not work 
> on R3's????????
> 
> It appears that this has to do with the "cam"
> (arm/lug) spring pressure. I 
> had one that would work on an R3 Safari that I had,
> but no way would it meter 
> within 2~3 stops of where it should have been on an
> R4 & R5 at the time. I had 
> to "Jury-rig" or "Art-ize" a separate set of springs
> so that I could 
> interchange them, depending on the body that I
> planned to use!
> Talk about "A pain in the posterior"! I still have
> the Tamron lenses, since 
> they were unusual and wonderfully performing lenses,
> but I now only use them on 
> my Nikons, Pentax LX, and a Rollieflex SL35E (Now
> there's a "moldy oldie" 
> with some serious quirks!!
> 
> Just some observations,
> 
> Art Tafil
> natstek@xxxxxxx
> 
> 
> ------
> Unsubscribe or change to/from Digest Mode at:
>     http://www3.telus.net/~telyt/lrflex.htm
> Archives are at:
>     www.freelists.org/archives/leicareflex/
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
------
Unsubscribe or change to/from Digest Mode at:
    http://www3.telus.net/~telyt/lrflex.htm
Archives are at:
    www.freelists.org/archives/leicareflex/

Other related posts: