The ExpoDisc (77mm) brand_Toyo with an effective image stabilizer

with an effective image stabilizer and a bit more wide-angle reach than your usual 18-to-whatever standard lens

The Sigma EX 4

used briefly before Exxon’s lawyers got involved

there is no effect on function

The Mamiya Prism Viewfinder (Model 2) fits the RB67 and RZ67 and provides a slightly angled eye-level view of your focusing screen

The ExpoDisc (77mm) brand_Toyo with an effective image stabilizerThe 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