freaklikeme Offline Upload & Sell: Off
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bjornthun wrote:
On the Sony FE 90 the fbw gives a much longer focus throw than I've gotten with any focus clutch lens. This is why the precision is so much better. Yes, you can compare it to macro lenses with a really long helicoid, it's something in that category.
Focus by wire is superior to everything else, when it's tuned right. I'm very happy to be rid of clutched AF lenses altogether.
I don't think I've seen that opinion expressed, but I think I understand. Since there's no 1:1 mechanical correlation between the focus ring and the lens movement, you can get fast AF and program as long a focus throw on the ring as is necessary for the lens and it's typical uses, something that's not possible with clutched AF. It's an excellent point and not something I'd considered before. The only downside I see in FBW (versus clutched) is that if the AF fails, most likely MF will fail as well, where a clutched AF lens might keep you limping along until you could get it repaired.
All things considered, though, I'd rather just have a fully manual lens. I ended up selling both the 50 and 35 in favor of the ZM 35/1.4. If someone would make a fully manual 400 comparable to the 400/5.6L, I too could be free of the clutched AF lenses.
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