Canon Speedlite 600EX II-RT diopter designed to fit the IS

designed to fit the IS series of cameras

causing a condition known as "pain in the butt

Please do not buy this as a standard 50mm lens and expect it to be "good

The Jupiter 8M 53mm f2 is designed to fit Kiev/Contax rangefinder cameras

Canon Speedlite 600EX II-RT diopter designed to fit the ISThe Canon Speedlite 600EXII RT is a modern Speedlite for Canon DSLR and mirrorless cameras, with all the usual niceties of a full size flash tilt swivel head, full manual or automatic control, a big LCD display plus compatibility with Canon's RT radio remote system. Faster recycling than the original 600EX, plus a water resistant body for extra peace of mind. In excellent condition, with case, stand, diffuser, and two filters.