I just got my Sigmalux in the mail today! Needless to say, I was very excited and immediately got my 5D out for some test shots. Initially, it seemed like my copy was front focusing. However, after shooting some more test shots, I got the following results which seem to indicate that the lens is ok?
I'm confused. Can anyone help interpret these results for me? I'm not really sure whether it would be useful to send this copy back to Sigma for calibration.
These were taken at ~1.75 ft focusing distance:
First, the shot that made me suspect a bit of backfocusing. This was taken at f/1.4. To me, it seems like the handgrip on the camera is sharper than the point I focused on (the word "Leica").
I took some test charts after that, but I'm not really sure what to make of the results...
f/1.4:
f/1.6:
f/1.8:
f/2:
f/2.2:
f/2.5:
f/2.8:
And a shot of the basic setup for the test charts. I used one off-camera speedlight through a 45" umbrella to light the chart.
As a side note, Sigma finally decided to get rid of their crinkle coating that was formerly applied to all EX series lenses! Here's how mine looks:
I'm confused. Can anyone help interpret these results for me? I'm not really sure whether it would be useful to send this copy back to Sigma for calibration.
These were taken at ~1.75 ft focusing distance:
First, the shot that made me suspect a bit of backfocusing. This was taken at f/1.4. To me, it seems like the handgrip on the camera is sharper than the point I focused on (the word "Leica").
I took some test charts after that, but I'm not really sure what to make of the results...
f/1.4:
f/1.6:
f/1.8:
f/2:
f/2.2:
f/2.5:
f/2.8:
And a shot of the basic setup for the test charts. I used one off-camera speedlight through a 45" umbrella to light the chart.
As a side note, Sigma finally decided to get rid of their crinkle coating that was formerly applied to all EX series lenses! Here's how mine looks:
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