JJC RR-EOS Reverse Rings are threaded on one side to fit the filter thread of your lens. The other side has a mount like your camera lens. Screw the adapter into your lens' filter thread, turn the lens around and bayonet it into the camera body. This greatly increases the macro reproduction range capabilities.
Merci de m’envoyer le manuel utilisateur en fichier PDF.
Please send me the user manual in PDF for
Reverse Ring, 67MM thread with CANON EOS
Avenue du Pailly 8
JJC: Dear customer, there is no user manual about RR-EOS 77MM.