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Contax teleconverters

I had a Kenko 2X convertor many years ago. Having tried 3 or 4 times with 50mm f1.7. The image quality of photo taken with that convertor was downgraded to unacceptable level. I decided to leave it alone. I bought a Mutar II 2 years ago. I always bring it along with me now. It works very well together with my 85 f1.4 and 70-210 f3.5. It explains the difference. So don't save the bit money and destroy the Zeiss quality. Otherwise, why Zeiss ?

Francis.
 
My longest lens is a 200mm Apo Sonnar. I have a Mutar II for this lens. I would like to hear from anyone who has experience in using a Mutar III with the 200mm Apo Sonnar.
 
> > > > Hi, I also got the 200/2 Apo-Sonnar but regret not being using it often > enough. My solution is not using the mutar at all, I crop the film and enlarge > only the portion I need and to be it is still excellent quality that way. And > I still keep my speed and boken of the lens. Brgds/kaisern > > >
 
Hi -- I own a 28mm, a 50mm and an 85mm, and will eventually get a 135. I think the Mutar will work with my lenses, but what about a Mutar III? Or are the II and III intended only for telephoto lenses? I like the saved f/stop that the Mutar III affords.

Thanks.
 
You can use only Mutar I with 28mm, 50mm and 85mm lens. The other Mutars won´t fit mechanically because of protruding lens element.
135mm + Mutar I has some vignetting, may be a problem with slides. 135mm + Mutar III or II work better.
Dieter
 
Is there any restriction on the lenses that can be used with Mutar III (like there is with the II)? I can't seem to find any information anywhere that specifically addresses this.
Thanks,

Kirk
 
According to Zeiss specs:

P 2/100
P 2/135 ("soft" sharpness)
S 2.8/135
S 2.8/180
TT 4/200
AS 2/200
TAS 2.8/300
TT 4/300
VS 4/80-200
M 4.5/500

My experience with 2.8/135, 4/300 and 4/80-200 is that it works fine wide open with the 135 and zoom, but 4/300 + Mutar III is very soft wide open. At the other Contax mailing list some reported that you can use M III even with VS 100-300. And I think it can be used with Mirotar 8/500, but I´m not sure.

Dieter
 
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