Quote:
Originally Posted by Tannin
It wouldn't auto-focus, and the manual focus was weird, really weird. I did sort of OK by just focusing manually roughly and then moving the camera to fine-tune, but it was weird. Perhaps I was predisposed to expect it not to work and could have tried a little harder. In any case, I soon found that the leaf hopper was fairly docile and went back to the trusty 60mm macro after all. Sounds as though I had better experement some more though, Sapphire!
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You lose two stops with a 2x converter and that means the lens will not autofocus as the Canon body will not autofocus if it thinks the aperture of the lens is greater than f5.6 or with some models f8. Some people ''tape the pins'' to overcome the problem or use a converter without the relevent pins (Tamron) but I'm not sure which pins they tape. Puzzled by the weird manual focus bit, maybe just a very dark viewfinder due to the 2 stops loss making it hard to see properly.