2xEFII & EF-S 17-85 f4-5.6 IS USM

[wibbly]

Does anyone know yet if the above combo will work (are compatible)?

Sounds like a good extra for a 20D with the EF-S 17-85 bundle when it becomes available, given the 17-85's IS. Only downside would seem to be a max effective aperture of f11 for the combo...

I've not seen the 2x EF II listed as compatible with the EF-S 17-85, but maybe this is only becasue the 17-85 is so new?

Is it true that AF won't work anyway, as the max aperture of the 17-85 is not as fast a f2.8?

W

[Tom W]

I very seriously doubt if it would work. The 2X teleconverter isn't compatible with any of the normal/wide EF lenses due to how the front lens element of the TC reaches into the rear cavity of the lens. Wide and normal/short telephoto lenses' rear element moves too far back and would physically strike the front element of the teleconverter. The EF-S series lens rear element protrudes even farther back and would thus physically contact the teleconverter also.

[timmyquest]

i know it wont work.

[PacAce]

Does anyone know yet if the above combo will work (are compatible)?

Sounds like a good extra for a 20D with the EF-S 17-85 bundle when it becomes available, given the 17-85's IS. Only downside would seem to be a max effective aperture of f11 for the combo...

I've not seen the 2x EF II listed as compatible with the EF-S 17-85, but maybe this is only becasue the 17-85 is so new?

Is it true that AF won't work anyway, as the max aperture of the 17-85 is not as fast a f2.8?

W

Seeing as how the mark II series of the 1.4x and 2.0x TCs came out in 2001 and the EF-S lens mounts didn't even come out until much later, in 2003, you won't even be able to mount any EF-S lens onto any of the Canon TCs.

[wibbly]

Thanks all.

One of the 'benefits' of the new lens series, then :-(

Do Nikon have similar compatibility issues with their AF-S DX lens(es)?

W

[CyberDyneSystems]

Wibbly,

Check the "EOS" sticky..

You'll see that only a few specific telephotos will work with a T-con.