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Sigma 30mm f/1.4 for DX systems
  
 
VinnieJ
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p.2 #1 · Sigma 30mm f/1.4 for DX systems


trenchmonkey wrote:
Yeah, that's not the best of test targets
My "high dollar" AF tweak station works great.

http://i244.photobucket.com/albums/gg31/rvrsbnd/D8H_2840_zps8600eb1b.jpg

FWIW, I've been using the 35 f1.4 'A' on my D7K with outstanding results...no interest in the 30.
I have the 28 f1.8G if I need fast and wider.


I had the 35/1.4 as well and it was much sharper than the 30. The 30 is smaller and lighter, I really wanted it to be similar to the 35.



Jun 28, 2013 at 09:50 PM
trenchmonkey
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p.2 #2 · Sigma 30mm f/1.4 for DX systems


I did go through a "dot tune" session with the lens prior to doing this. It had a back focus between -5 and -15 depending on distance to subject.
Dot tune will get you close, but I'm not sold on it for the most critical of adjustments. It was -2 off before this final yardstick tweak.




Jun 29, 2013 at 11:33 AM
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