Re: Sigma APO's

[Chris Gibbs <cpgibbs@xxxxxxxxxxxxx>]

Willem-Jan Markerink wrote:

> I just spoke to a Sigma rep, who claimed that their APO's didn't need 
> focus correction for IR either.
> I hesitate to believe that right away....the guy said the deviation
> was too little to put it on the DOF scale....so the question is: has
> any of you ever run (focus) tests on HIE with a Sigma APO at full
> aperture? 

Same goes for the new Bronica 100-220 Aspherical zoom (for all those
Bronny folks on the lookout for a 70mm back)!

I got the info first hand from Introphoto, the UK distributer.  BTW, the
100-220 is a very impresive optic, pin sharp and a joy to use!!!

Regards,
Chris Gibbs
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