Just playing around last night, I fitted the Canon 400mm F5.6L telephoto lens and Canon x2 Extender EF II to our
EOS M (mirrorless) camera and grabbed a few shots of the Moon just before dusk.
The EOS M auto focused okay at 800mmm at F11, which was a nice surprise. Taken at 1/30 sec, ISO 100, F11. The 5 consecutive frames were aligned and combined in Images Plus with finishing in CS6.
The attached files are a 1024 crop and a full resolution 1920 crop.
WARNING: 1920 file is 1920x1200 pixels at 185 kB
Cheers
Dennis