Ernie Aubert Offline Upload & Sell: On
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This is a timely post for me; I just yesterday tested my new Sigma 50 f1.4 (on my 40D) for the AF at distances issue. I shot a building from maybe 60 feet from the front (with the tripod/ballhead leveled by bubble), with mirror lockup and electronic cable release. I shot at all apertures. To my chagrin, it back-focused very significantly. The front of the building (I used only the center AF point, on the front) wasn't in focus till beyond f5.6, but the roof, which slopes away from the front back and up to the peak, was very sharp at all apertures.
I'm going to send it along with the camera to Sigma to have them adjust it for the camera. I like the IQ so much that it'll be worth the wait if it comes back focusing properly.
I'm expecting a 30 1.4 to arrive Wednesday, so I won't send the 50 till I've tested the 30!
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