[rollei_list] Re: [off-topic] The new Fuji will be sold ... and affordable ?
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Thu, 2 Oct 2008 14:11:37 -0700
----- Original Message -----
From: "Robert Meier" <robertmeier@xxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Thursday, October 02, 2008 8:07 AM
Subject: [rollei_list] Re: [off-topic] The new Fuji will be
sold ... and affordable ?
I've bought three Super Ikonta IV's in the last few years,
because I had one as a teenager, my first serious camera,
and had great results from it (still have the negatives I
shot then). I have bought three in resent years because
each one was not sharp. I finally sent one to to
whats-his-name on Bald Mountain to be alligned, and it
came back still not critically sharp. The standard I use
is to make an 8x10 print and look at it with a 4x
magnifier. Rollei shots are very crisp at that degree of
enlargement. The Super Ikonta shots are all much less than
crisp. I gave up on Super Ikontas.
Likely you are seeing the effect of the lens being a
front element focusing type. Unless a lens is made fairly
complex moving one element only will upset all the
corrections. Front element focusing lenses are designed to
have reasonable correction through their range but are never
quite right at any distance. On top of that f/2.8 is right
at the limit of speed for a Tessar type and generally such
lenses suffer in comparison to slower versions even when
stopped down. Tessars expected to have very high performance
are usually much slower as, for example, the Kodak
Commercial Ektar (f/6.3) and the Nikon LF lenses at about
f/8. The difficulty in getting acceptable performance near
wide open for an f/2.8 Tessar is probably why Rollei went to
another design for its f/2.8 cameras.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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