Canon RF 14-21mm f/1.4L USM one of the “crazy” lenses coming next year [CR1]

SecureGSM

2 x 5D IV
Feb 26, 2017
2,360
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Uncle Roger also says it's hard to find one of those well aligned.
Interesting. Do you recall where Uncle Roger mentioned this? modern Sigma Art glass is quite consistent from a QA perspective. The earlier models prior to the 24-35/2 Art were hit and miss for sure. The 28/1.4 is a relatively recent model
not a word on poor copy to copy variation. They test 10 copies to produce their MTF charts. Sigma 28/1.4 kills Otus 28 in the MTF department.
 
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Michael Clark

Now we see through a glass, darkly...
Apr 5, 2016
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Interesting. Do you recall where Uncle Roger mentioned this? modern Sigma Art glass is quite consistent from a QA perspective. The earlier models prior to the 24-35/2 Art were hit and miss for sure. The 28/1.4 is a relatively recent model
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not a word on poor copy to copy variation. They test 10 copies to produce their MTF charts. Sigma 28/1.4 kills Otus 28 in the MTF department.

Sorry, I was still stuck on Sony. With Sigma the only issues I'm aware of are with AF consistency. YMMV.
 
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SecureGSM

2 x 5D IV
Feb 26, 2017
2,360
1,231
Sorry, I was still stuck on Sony. With Sigma the only issues I'm aware of are with AF consistency. YMMV.
There is one serious issue with the Sigma otherwise excellent Art lenses namely: 40/1.4, 14-24/2.8, 12-24/4 - a massive focus shift.

Wide open focus is right on the money. However stopped down by two stops, focus would shift behind the subject and by a lot.
Not a problem with Sony cameras focusing stopped down. Still a problem with Canon DSLRs and mirrorless
 
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