[rollei_list] Re: OT: 35mm RF (Voigtlander Bessa)
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Wed, 19 Apr 2006 17:52:28 -0700
----- Original Message -----
From: "Marc James Small" <msmall@xxxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Wednesday, April 19, 2006 2:47 PM
Subject: [rollei_list] Re: OT: 35mm RF (Voigtlander Bessa)
At 11:09 PM 4/19/06 +0200, Thor Legvold wrote:
Hi Marc,
I appreciate the answer. From the little I've read on RF
systems, I had
thought focusing anything under 28mm or over about 150mm
was pretty
much impossible with any degree of accuracy. How do you
manage the 12mm
and the longer teles?
What approximate used prices am I looking at for something
like a
1.4/35mm, 1.4/50mm and/or 2/90mm? They don't have to be
exotics (ASPH)
for me if they're available in a regular formula.
Focusing accuracy depends on rangefinder baselength, and the
Kodak Ektra is
the king here, followed by the Contax II and III -- the
Contax II and III
will JUST allow a 180mm lens to be focused but great care is
required. The
4.5/21 is not RF coupled but with its immense Depth of
Field, this is not
an issue. And for lenses longer than 135mm and for macro
work, I use a
reflex housing, generally a Visoflex III, though I have a
slew of these
guys as well in both LTM and M.
The three lenses you mention ought to be easily found at
$400 or less,
perhaps slightly higher for the 2/90 pre-ASPH.
Marc
msmall@xxxxxxxxxxxx
Cha robh bàs fir gun ghràs fir!
NEW FAX NUMBER: +540-343-8505
There is a little more to it. Its the base line plus
whatever magnification there is in the viewer. Leica thread
mount cameras have a 2X telescope in the rangefinder so the
effective baselind of the rangefinder is doubled. Cameras
like the Ektra and Contax, which have the rangefinder image
combined with the viewfinder, can not have telescopes so
must have a physically longer rangefinder baseline for the
same focus sensitivity.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
---
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