Luds34 said:TWI by Dustin Abbott said:Luds34 said:TWI by Dustin Abbott said:grainier said:So, as far as AF speed is concerned Canon 85/1.8 is still in a class of its own?
I wouldn't say so. With the VC turned off the Tamron is every bit as fast.
Oh really? And how does the VC affect focus speed? Could you please elaborate a little bit?
I'm very happy with the Canon 85mm f/1.8, however it would be nice to have a lens with a little more natural punch in it's IQ but I'd be loath to lose the very fast and accurate focus.
As I describe in the review, the lens tends to arrive at focus but hesitate for a split second before locking. Turning the VC seems to eliminate that, so it makes me think that it is intentional to allow the VC to fully engage and "settle" so that the image quality is not affected. Turning the VC off speeds up focus be eliminating the hesitation. The actual focus speed is very fast and quiet on the lens.
My apologies, I haven't read your review (yet) as I've been a bit busy. Thanks for humoring me and reiterating what was probably very clearly stated in your review.
As a novice user of the Tamron 150-600 I have noticed similar experiences. The VC system is very good and does allow a number of stops of compensation. However the small delay to kick in can be a minor pain, depending on the shooting conditions. I also don't have the "panning" firmware so trying to track a moving subject has caused missed shots with the VC fighting the moving lens. Not to completely highjack a thread here, but has anyone taken the time to send their lens in for the firmware upgrade? And is it worth it?
I sent my 150-600 in for the firmware upgrade some time ago. It worked fine for me, and made me feel much better about choosing the Tamron rather than waiting for the Sigma 150-600 C, especially after reading Dustin's reports about the focusing issues he had with the Sigma. My advice is to send it in. The only cost is shipping one way, and they get it in and out of their shop in about 2 days. I was without mine for about a week.
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