Archived posting to the Leica Users Group, 1997/04/26

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Subject: Re: converter for M?
From: Stephen <cameras@jetlink.net>
Date: Sat, 26 Apr 1997 06:11:14 -0700

Marc James Small wrote:
> 
> At 03:42 AM 4/26/97 -0700, Stephen Gandy, Optical Wizard, wrote:
> 

"Optical Wizard?"   Well gee Marc, coming from someone who thinks
Russian LTM lenses are great, that is a real complement.   

> >>Dicey Optically?  only if you put them on a Russian lens.
> >
> >Try a late Summicron.  Some nice advances have been made in the last
> >fifty years.
> 
> I didn't own a single Russki lens when I tested the Komura.  Tried it on
> Summitar and collapsible Summicron.  For once, I agree with Pop:  "muddy
> images distinguished only by vague blotches of color", or words to that
> effect.

So Marc, you proved it was not a good choice to use on a Summitar and
the original 50 Summicron, but that was all you proved.    A modern
optic would have been a better test. Any teleconverter is only as good
as the lens you test it on.  Even then, the results of a teleconverter
will vary from with different lens designs (depending upon how well each
optical formula works TOGETHER).    

Which issue is the POP test in?  

> I encourage all on the list to try the Komura 2x tele-converter:  these are
> still available new, I believe, from Cambridge, that paragon of lens
> salesmanship.  Just make sure you have a MBG -- you'll be desperate to send
> it back!
> 
> Steve, do YOU own one of these Komura gems?
> 

A friend loaned me one.  I used it on a late 50 Summicron and the black
Canadian 90 Summicron(not the compact 90/2).  Not as sharp as the prime
lens of course, but still good two stops down.   When I find a nice used
one at a good price, I will buy it.   I don't like to buy new and take
the instant 30-50% depreciation hit.   

So who else out there has shot with the Komura converter?  

Stephen Gandy