Olympus EE-1 Red Dot Sight m42 base diameter is approximately 72mm

base diameter is approximately 72mm

and makes a total of 12

This nifty little addition of the split body allows for the side with the lens to rotate 180 degrees

plus a couple of selectable focus and exposure modes for more creative shooting

Olympus EE-1 Red Dot Sight m42 base diameter is approximately 72mmThe Olympus EE 1 is a red dot sight designed to make supertelephoto photography a bit easier: instead of peering through the lens and desperately trying to figure out what you're pointing at with your 1 degree view, you can mount this sight to the top of your camera and very easily get things pointing generally in the right direction. In excellent condition, with original box.