Won't work, Leica M and LTM lenses have a register of around 28mm,
Pentax K is 45.5mm. No way to get inifinity focus barring adding optics.
-Adam
Shel Belinkoff wrote:
Hi,
I somewhat understand what you're saying, but not with 100% clarity. I
always have difficulty understanding descriptions of mechanical things
unless I can actually see them for myself. Once I do, everything falls
into place and becomes quite clear. Having thought about this a bit, it
may be that Juan was talking about using a Leica (RF) lens on the istD, not
a Pentax film body. That way the smaller mirror of the istD would allow
the lens to fit closer to the film plane. Am I misunderstanding what
you're saying?
Anyway, I found what I believe is the adapter Juan has, and I may just go
ahead and order one and see how it works with my Rangefinder lenses. Then
I'll both understand what you're describing and will know for 100%
certainty what works and what doesn't.
And just to reiterate, I could very well be mis-remembering what Juan said.
Shel
[Original Message]
From: Godfrey DiGiorgi
It would be doable with a Leica R lens, or a longer focal length
Leica RF lens with short mount and Pentax M42 adapter.
The Leica R cameras have a deeper register than the Pentax M42 and K-
bayonet mount so a mount adapter could be constructed easily enough
if the flanges and aperture actuators, etc, are not placed with too
much interference.
Leica RF lenses are designed for a much thinner mount register and
could not be adapted to Pentax without optics, unless you use a short
mount lens (designed for bellows/reflex housing) and build a custom
short mount with a Pentax end.
Godfrey
On Feb 11, 2006, at 7:35 AM, Paul Stenquist wrote:
Please report back. If there's a way to achieve this, it flies in
the face of both the physical evidence and my personal experience.
Paul
On Feb 11, 2006, at 9:59 AM, Shel Belinkoff wrote:
My memory of a discussion about this with Juan suggests otherwise
- but, I
could be mistaken. I'm looking into the issue now.
Shel
[Original Message]
From: Paul Stenquist
Unfortunately, there is no way to enable infinity focus with a Leica
rangefinder lens on a Pentax SLR. The lens will hit the mirror if
it's
mounted close enough to allow infinity focus.
