I've got the Sigma 600/8 with EOS mount, and it works just fine with 10D. Auto exposure works as expected in Av mode, even though aperture shows as "00" and cannot be changed, and Tv behaves just like M, where only epxosure time can be set.
I've also used some old manual-only lenses with M42-EOS adapter with 10D without problems.
I use -with corresponding adapters- Nikkor and Leica R lenses in my EOS 1Ds and 350D. They work exactly as described.
Felix
* **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
