Tom W wrote:
The mirror of the 10D/D60/D30 is smaller due to the smaller format. I'd check physical clearance - it may fit, and it may not. Not that it matters as serious vignetting is a given.
Besides, the Sigma merely has a smaller diameter image circle - the 17-85, even with the alteration, still has a deeper reach into the mirror box cavity.
I wouldn't bother putting it on full-frame either, but if it physically fits, somebody will try it - which is why Canon won't do it.
The mirror of the 10D/D60/D30 is smaller due to the smaller format. I'd check physical clearance - it may fit, and it may not. Not that it matters as serious vignetting is a given.
Besides, the Sigma merely has a smaller diameter image circle - the 17-85, even with the alteration, still has a deeper reach into the mirror box cavity.
I wouldn't bother putting it on full-frame either, but if it physically fits, somebody will try it - which is why Canon won't do it.
17-85mm modified doesn't reach deeper then my Sigma. Look at the rear element in fig. 4 the lens doesn't extend past the rear mount or the lens elec. contacts, and neither does the Sigma (infact the sigma rear glass bulges out just a hair more from what I can tell (it cleared my Elan), once you've made a lens EF mount it's EF mount, remember the 17-85mm now sets as deep as the 24-85mm, should clear any and all mirrors.
