the best i have used is the Pentax 1.7XAF extender, but it got limitations
in that your camera now uses the TC's focusing elements instead of the lens
one. the Sigmas are pretty good, but i found the bokeh too objectionable.
the 2X is softer than i would like. my other extenders are manual focus and
fit only specific lenses.
Herb...
----- Original Message -----
From: "Christian" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, June 22, 2005 11:48 AM
Subject: Re: TCs on digital
I used the Sigma EX 2x and 1.4x TCs with my Sigma AF 300 APO macro with
the
*ist D. The results were fantastic. Unfortunately my home-based web
server
had a catastrophic hardware failure so I can't show you any of those
pictures. You may recall the cormorant, the landing seagull, and other
birds. I never experienced CA and the images were pretty darn sharp.
Several shots were done stacking both TCs which reduced contrast but that
can always be pumped up in post-processing.
