nehemiahphoto Offline Upload & Sell: On
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photosbyjaron wrote:
I would imagine it may be more dependent on body than lens. I don't find my RIV to be particularly great at nailing focus when my pup is running towards me with any lens I own. I haven't done any kind of standard test to compare, but I have the RIV, and if he's running straight towards me, the keeper rate of his eyes being in focus compared to the middle of his ear is maybe around half. I don't notice that the 65i or 35i is any slower or faster than the 24-70DN in AF. Mind you, that could also just be my abominable technique for fast moving dogs, as trying to track my dog is way harder than the landscape shots I normally take. My back yard is also especially bad to test at the moment being covered in snow, and with the RIV, the AF has a hard time sticking to him even when he's just sitting there. I have a black cast iron fence, and AF really likes to lock onto the fence or a bush or a tree instead of the pup. Safe to say, the 35/65 are somewhere between the 135GM and the 85GM in AF speed. ...Show more →
Thanks for the info! I can see where you were coming from and how that would be such a tricky situation. What AF settings are you using?
The ZA 55 is absolutely spectacular for zippy AF and you can track dogs wide-open running quite fast with a capable body like the A9 or even the a7iii gives pretty decent results. If the focus speed is just average or slightly above, it will not work for me. If the focus speed is fairly fast to very fast, it becomes a lot more interesting.
If anyone else has any experience with the 65i tracking kids or dogs thy are moving quickly, please do chime in.
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