Olympus B-300 1.7x lens mount_Canon FD smaller than the standard 50mm

smaller than the standard 50mm lens

Not spotless- don't buy this if you expect a perfect specimen- but good where it counts

The Canon Macro Auto Ring is a useful macro accessory which provides automatic stop-down features to FD lenses mounted on non-automatic bellows

this one opens on the “back”- the side that sits closest to your body- for extra security

Wireless operation requires 4 AAA batteries (not included)

Olympus B-300 1.7x lens mount_Canon FD smaller than the standard 50mmThe Olympus B 300 is a 1. 7x teleconverter lens, designed to fit the IS series of cameras, but suitable for many other lenses with 55mm threads. In excellent condition.