Mine is serial 1007xxx, sounds like the early ones had some issues.
Some 100%-crop focus tests shooting down a wall using a 1Ds2 and tripod.
At 25 feet (red arrow pointing at focus target), slightly more area in focus behind the target than in front but it\'s probably designed that way for portraits:
At 5 feet:
Disregard exposure, which was +1EV.
Focus seems right on the money! Definitely need your focus target to stand out against the background though, initially I put the target on a cinder block seam and the AF picked up the seam instead of the target.
Note the purple fringing before focus plane and green after, to be expected I suppose with CA of about 1/3 pixel wide-open. Very nice lens though, well-built and solid, good match for the 1Ds2.
Mine is serial 1007xxx, sounds like the early ones had some issues.
Some 100%-crop focus tests shooting down a wall using a 1Ds2 and tripod.
At 25 feet (red arrow pointing at focus target)
At 5 feet
Disregard exposure, which was +1EV.
Focus seems right on the money! Definitely need your focus target to stand out against the background though, initially I put the target on a cinder block seam and the AF picked up the seam instead of the target.
Note the purple fringing before focus plane and green after, to be expected I suppose with CA of about 1/3 pixel wide-open. Very nice lens though, well-built and solid, good match for the 1Ds2.
Apr 24, 2009 at 01:00 PM
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