FWIW, I've tried Kenko tubes yesterday (12mm, 20mm and 36mm) and they work fine with 50/1.8 and Sigma 28-200/3.5-5.6. AF does not work (it hunts a lot) but I expected that, especially on the 50mm, DOF is _really_ shallow. I think yours should work with all lenses.
rgds. > -----Original Message----- > On Mon, 14 Jan 2002 13:31:38 -0500, you wrote: > > >At 02:00 AM 01/12/2002, you wrote: > >>By the way, I know the Canon > >>literature syas "Autofocus not recommended" with the EX tubes, but > >>should it work at all? > > > >Doesn't that in part depend on the effective maximum aperture of > the lens > >plus tube? On The Elan 7, the Focusing Range = EV 01 - 18 (At > ISO 100 With > >1.4 Lens). With a 28~135/f/3.5-5.6, what's the effective max > aperture with > >the EF25 tube attached? > > > > > >-- > > Good point, but I can't even set the aperture to max with the tube > attached, since it's not reporting any aperture info at all. With > this in mind, I tried it with my 50/1.8 - first putting the lens on > the camera and setting it to f/1.8 so it would "rememeber" - and then > put the Ex tube in between. Should certainly work at f/1.8. Still > nothing. Off to the repair shop. > * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
