Sorry to get away from Ken's questions, but I wonder why the 25mm
doesn't work with the 45TSE.  The wides and wide zooms make sense that
it would be incompatible: the lens won't focus on anything because the
farthest focus point would be inside the front lens element, most
likely.  The 50/1.0 probably has too big a rear element and either
vignettes horribly or won't actually fit inside the tube.  But for what
reason does the 45TSE get left out in the cold??

Ken, short of trying it with a different body to see if it works, I
don't have any other advice than has already been suggested.  I'd say
something is shot.  Send it back.

Mike





Tim Franklin wrote:

> 
> Ken,
> 
> Canon's lens brochure says the EF25 can NOT be used with the following; any
> lens below 20mm focal length (ie 14mm, 15mm fisheye, 20mm), the 24/1.4,
> 50/1.0, 45/2.8 TS-E, and the 17-35mm and 20-35/3.5-4.5 at the shorter focal
> lengths.
> 
> Your lenses should be OK with it, so either it needs a clean or yes, you
> have a lemon.
--
Michael Shupe
M.J.Shupe Photography
Michigan Tech University
www.northernlightsgallery.com
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