[LRflex] Re: R 2x APO Extender Question

Dave Saalsaa  asked:
>David, did this vignetting occur only with the 400 mm lens?  I was thinking
>of getting one again to use with my 180mm f/3.4 lens.


Yes. ONLY with the 400mm f6.8 Telyt.  I use it with the 80~200/f4 
Vario (see: http://www.telyt.50megs.com/cab_snake_bird.htm  - which 
turned out pretty good, hand held, max zoom, from a moving boat!) 
regularly.  Results are superb.  I've used it with the 90 Summi, but 
that combination does not work so well.  Still, no vignetting.  I've 
also used it with the 50mm (1st - 2 cam version) at full aperture, 
http://canadianartandstock.ca/photograph_sample.php?photographid=428 
with good result.  Again, no vignetting.

The problem seems only to occur with the 400 Telyt, and I don't know why!

Ted has used it with any number of lenses, and I do not believe he 
has had a problem, either.  But, with the 400 telyt, I have had the 
problem.  Go figure!

Should be fine with your 180/f3.4!

Cheers!

---

David Young,
Logan Lake, CANADA

Wildlife Photographs: http://www.telyt.com/
Personal Web-pages: http://www3.telus.net/~telyt




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