The ExpoDisc (77mm) arca Very minor coating marks which

Very minor coating marks which will not affect image

There is some surface wear and brassing on the body

but it's easier than carrying a sack of lenses around everywhere

and good diaphragm action (with slight wear on the blades)

but focusing and aperture control are smooth

The ExpoDisc (77mm) arca Very minor coating marks whichThe ExpoDisc is a clip on (or hold in front of) diffuser designed to facilitate setting custom white balance. Rather than hauling around a gray card, or trying to find a plain white surface, or hoping that your camera guesses correctly, you can toss this in front of your lens and lock in an accurate custom white balance in seconds. Bonus: if you actually use this on a lens with a 77mm filter thread, it can replace your lenscap. Yeah, its just a fancy