Mamiya RZ67 AE Prism Viewfinder (Model 2) projector up to 3kg (though Manfrotto

up to 3kg (though Manfrotto tends to be pretty conservative with load specs)

Leitz 39mm HOODF infrared filter for 35/50mm Summicron lenses and others with a 39mm filter thread

It should be noted that 70mm film is not something you can just walk into a store and buy

the 1980 F3

Olympus Digital 40-150mm f3

Mamiya RZ67 AE Prism Viewfinder (Model 2) projector up to 3kg (though ManfrottoThe Mamiya AE Prism Viewfinder (Model 2) fits the RZ67 medium format camera and provides a slightly angled eye level view of your focusing screen plus metering and autoexposure control. Yes, it's kind of awkward to hold an RB RZ at eye level, but sometimes it's nice to have the option. In good cosmetic condition, with some finish wear; there is some dust and spots of mildew in the optics. Function is good, though!