Sigma USB Dock calibration data of 35mm and 5Diii.
I just got my Sigma 35mm a few days ago and I am very happy with it. Sharp, nice AF consistency and +0 MA on my 5Diii. However, I couldn\'t help but to play around with the USB Dock.
With the USB dock and the 35mm, the software allows one to micro-adjust to 4 fixed distances. They are 12\", 16\", 26\" and infinity. WOW, I was surprised that the first 3 distances are within a foot of each other and then you have infinity. So I found that on my \"great copy\", the sharpest of sharp adjustments are:
+4,+6, +3, +0 for 12\", 16\", 26\" and infinity respectively.
Kind of makes me think that the 5D3 paired with this lens has this focus shift for close range (and maybe most FF canon bodies). I know it is just my lens/ camera pairing, but just wondering if this is the normal trend.
Has anybody else using the USB dock finding that they need more MA for the close up range on the 35mm?
I would like to add that this dock is very valuable. The focus is now very tack sharp and consistently matching live view focus at most distances. It is slightly less sharp at around 3.5 feet but still pretty darn sharp. (maybe I will need to adjust one number by one) I will have to say that this is my sharpest lens below 2.0 while using phase detect AF.
Jun 08, 2013 at 02:22 AM
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