ahsanford said:infared said:The Sigma AF definitely an issue. I own both the 35mm & 50mm Art lenses and the Sigma Dock. I went thru the ringer with it. I bought an 35mm first...and thought that the AF was "fine"...then I bought a 50mm and it was a nightmare...I could not get it to focus correctly even with the dock. It was "spotty. I sent it back to B&H and requested another copy...and, after "carefully" dialing in the focus on the Dock it has been fabulous. I usually only use single-point AF so....I do not know about other AF settings. The AF works with central or edge AF points....I then double checked my 35mm "very carefully" after my experience with the 50mm and found it to be "off" more than my new 50mm. So...I used the Dock to adjust the 35mm in all 4 focus zones as I had the 50mm and since that time...I have found that both lenses are just incredible. Yes..at f/1.4. I double checked before typing this...I tested at infinity, medium distance and close..very close at f1.4. They are spot on. Its funny while I was doing that I put my Canon 100mm Macro f/2.8L IS on the my 5DIII and it MISSED focus on a candle wick...focusing on the rim of the candle behind it when the focus point was dead on the wick. Second shot it nailed it, though.
So ...I guess no lens/camera AF situation is perfect....and I have to say...I do not blame anyone who does not want to go thru the process I had to go thru to get great results from the Sigma's....I mean..hey I spend almost a couple of thousand dollars on two lenses and I have to dedicate a lot of time, buy a dock and jump through hoops to get them to perform precisely. Yeah..its annoying...but for me ...for what is out there (and even this stellar looking new 35mm f/1.4II from Canon at $1800), I think I have two very stellar lenses for what I have paid for them. I know that some agree with that outlook and some don't....but I just love some of the images that I have been able to create with these lenses. Really love them when I want low DOF.
Thanks for sharing your story, but the USB dock will not solve inconsistent AF -- it will only solve front/back focusing, right?
See here: http://www.the-digital-picture.com/Reviews/Sigma-50mm-f-1.4-DG-HSM-Art-Lens.aspx
(Now this is Bryan Carnathan with the Sigma 50 Art, but I had a similar experience with the 35)
For the short version of what I'm concerned with, just pan down to the butterfly. Read the paragraph before the butterfly. Mouseover 1-10 and see what happens. Then read the last bit:
"A second copy of this lens shows similar inconsistent performance. Both this camera and the lens (via the dock) can be focus calibrated, but you cannot calibrate for inconsistency."
I thought the Sigma 35 Art on my 5D3 was razor, razor sharp. But it missed shots from f/1.4 to f/2 with glaring regularity, even with a very careful composition, no focus and recompose, single AF point instead of the '+' shaped cluster, etc.
In that light, paying 2x for the 35L II -- which is shaping up to be a sharper lens that also has fire-and-forget confidence with the AF -- seems a fair deal to me. Many may disagree with that, though.
- A
Like I said...my lenses seem to be very consistent. The 50mm that I sent back was not.
I agree with your outlook especially if you have the cash to layout $1800 for a 35mm prime. I would love to own the LII...but that is not going to happen for me at that price...nor will I own an Otis! LOL! it was a stretch for me to buy the two Sigmas...
I am very happy with the lenses that I own...if they did not perform well I would not tolerate that at all. I am very serious about creating images and need consistent results to achieve that.
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