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p.1 #12 · p.1 #12 · 58g focuses/tracks less accurately than 35/85 f/1.4g? | |
form wrote:
Having shot plenty of weddings with all of the above, I've come to the general conclusion that the 58g can't handle moving subjects as well as the others. The 35g and 85g both do a fair job of keeping on target with moving/dancing/walking subjects (af-c, 3d mode, D750), but the 58g falls behind and never seems to handle it. However, all lenses, on AF-S, seem to be fairly consistent with static subjects, so I don't really believe the focus fine tune needs adjustment.
Is this something others have experienced, by any chance?
I think you should reconsider your AF settings.
With 3D AF, you're asking the camera to not only focus, but to begin with first find something to focus on, then decide whether to indeed to keep focusing on the object found, and then anticipate on where it will be the next moment.
Sure, 3D AF has made huge improvements over the years, from what I read modern 3D AF can all do that impressively fast, but nevertheless IMO it still isn't 'magic, and still not as fast as shooting with proper 'normal', operator steered, action photography directed AF settings.
Due to the choices the electronics have to make, there always is an initial moment of 'hesitation', where the electronics have to make the necessary calculations to come to their decision.
In my experience (shot my fair share of weddings, both on digital, but also on film. Don't remember with much fondness having only 36 shots per film, and the constant pressure of wondering it was properly loaded - the 'endless' film was the worst nightmare- ) the kind of shots during weddings that demand ultra fast AF, usually/actually happen in one short moment/just the blink of an eye.
And for those moments the initial moment/hesitation 3D AF requires to get things in focus may very well be just a little too slow, and that may very well be causing the AF of your 58mm be too late, and consequently OoF
I personally have stayed away from 3D AF since using the early, rudimentary (it wasn't even called 3D AF in those days) implementation on the F100, tried it once, cost me a shoot (90% was OoF), never used it i earnest since.
Of course I have performed some test shoots with it on my newer bodies, film and digital, since, but never got the results I was after/demanded.
That said, with the proper AF settings (Dynamic AF with 1 manually selected AF points, 51 AF points - although some prefer less-, Custom setting A3 'Focus tracking with lock-on' OFF) it's very well possible to shoot fast moving subjects in action' and under bad lighting conditions, even must faster moving then what normal happens at a wedding.
I used to shoot surf (shore to sea e.g. http://www.pbase.com/paul_k/best_surf ) with the above settings, and still do for eg catwalk (fast moving subject under not always ideal lighting http://www.pbase.com/paul_k/20160403_max_h_jhm ) and outside location fashion shoots.
I have the 58mm myself, and following several reports that mentioned the 58mm's slowA F, put it to the test some time ago in a very unscientific test. Took some shots of a body boarder (kind of actually, he kept standing up), using the above AF settings, with only a humble DF.
Subject was moving from right to left, during which movement I followed him swiping along the camera in the same direction. Once I had my manually selected AF point on him I would just, as it only was for testing the AF, spray and shoot at 5 fps, results are here http://www.pbase.com/paul_k/20160529_surffest
my two cents
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