[Leica] For Sale..Be ready for the big EMP

[s.dimitrov at charter.net (slobodan dimitrov)]

Rollei claims 160 Lp/mm, I believe this is a Maco product, which I  
find hard to believe.
What do you make of the resolution found in the following images:
http://www.smcqueen.com/Maco/
s.d.

On Feb 1, 2008, at 12:35 PM, Henning Wulff wrote:

At 11:26 AM -0800 2/1/08, slobodan dimitrov wrote:
> I tried 3 lenses on an M4. All produced the hot spot.
> But that was over 30 years ago. Now, I'll stick with a metal shutter.
> On the other hand, resolution is so low with IR, that any lens will  
> do.
> s.d.
>

The Rollei and Ilford films you mentioned actually have quite high  
resolution, but then they are hardly IR sensitive, so the lens  
correction doesn't matter very much.

With HIE, the lens correction did matter quite a bit, and poorly  
corrected lenses were easily exposed in spite of the low absolute  
resolution. Besides the expected longitudinal colour error, lateral  
colour errors caused mush with many lenses, and coma was often terrible.

The cloth shutter in Leicas is quite IR opaque, which is easily  
tested by laying an IR loaded camera out in the sun with the lens  
removed. You'll get no more light leaks than you would with Tri-X.


-- 
    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw@archiphoto.com
  |[ ]|     http://www.archiphoto.com

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