I bought the adaptor only one week ago and i just replace with new AF m42 adaptor, so i can see this adaptor is new condition(the same as you can buy from other seller), i believe this is very cheap in ebay.

i can end this item with3.5pound buy it now price. please let me know if you want buy it now.thx!

For using Canon EOS cameras with M42 lenses (Zeiss, Pentax, Praktica, Mamiya, Zenit).  Metric scale M42 keeps its meanings due to compensation of the flange  bases difference. Therefore focusing can be to infinity.                

You should remember that the pusher with the  fixed ring doesn't work, so diaphragm control of the lens is set manually. This adapter can work with lenses having both only automatic diaphragm (A) and selector A/M (automatic/manual diaphragm). It is  possible to use Macro rings and other accessories.

Setting:

1. Put the adapter and lens collar together.
2. Turn the adapter clockwise till the fixative click.
3. Set M42 lens

Compatible with 

• Canon Digital EOS Camera (including EOS 300D, 350D, 400D, 10D, 20D, 30D, 5D, D60, 1D, 1Ds, 1D Mark II, 1Ds Mark II)
• Most Canon Film EOS Cameras (including EOS 3, EOS 5, EOS 300, EOS  50(E), EOS 100, EOS 500, EOS 30/33, EOS 1N(RS), EOS 1V, EOS RT, etc).

What will you get?

• M42 to Canon EOS Adaptor