« on: February 04, 2014, 11:53:01 AM »
Forgot to mention, the EF 50 f/1.4 does not AF on Sony a7+metabones adapter ... but when I mounted the Kenko Extension tubes on Sony a7+metabones adapter+50 f/1.4, the lens actually auto focused ... I am not sure what happened there but the Kenko extension tube is doing something to this combo and enabling it to auto focus ... thought some of you might be interested to know and those of you who have that combo, might want to give it a try and share your feedback. Cheers.
Very interested to know - I've not used extension tubes before, but I'm rather tempted now. The only native A7 lens I have is the kit lens, which I don't use because it doesn't do justice to the A7s sensors (the Canon 24-105L is plainly better); I've been using Canon EFs and a few legacy primes from various companies (I've become so accustomed to the slow focus of Canon lenses on A7s that it's rather a shock to revert to using them on FF Canon bodies (or using Olympus my OM-D, for that matter)).
One might ask - why bother at all if they focus faster on Canon bodies? For me, it's not about the weight difference, it's because I'm pretty sure the lenses make images that look better, even though an adapter is involved, than they do on a Canon FF body. Whether this is because of the sensor, metering, software, the fact that focusing is done directly via the sensor rather than a convoluted system of mirrors, or some combination of these factors, I'm not sure, but (at least when pixel peeping) the images seem a bit sharper, have a bit more "pop", and, of course, the files have better dynamic range (not just in terms of lifting shadows but in making shadows that don't go as dark as fast in the first place - or is that a metering thing?).
I liked the results so much with the A7 that I'm currently trying an A7r; the detail obtainable via even a cheap prime such as the 85mm 1.8 is pretty amazing on that sensor - it's nice to see that such a relatively elderly lens can do so well (the Sony kit lens doesn't come close), but now I want to try the Sony/Zeiss 55 1.8 - hard to imagine it would be much better. I haven't encountered the lens-slap-vibration problem yet (though I've not had a chance to scrutinize the photos I've taken on it with the 24-105; and today I'm trying the 70-200 f4 IS, so we'll see...), but for now I'm inclined to keep it instead of the A7.
By the way, have any A7 users reading this encountered the sensor reflection problem (which doesn't seem to affect that A7r)? See here:
I've not noticed that (probably because I use wider apertures at night), but I have noticed rather large halos around some bright lights that I'm pretty sure I don't get from Canon sensors.