The Tokina RMC 35-105mm f/3.5-4.5 was a one-touch macro zoom from Tokina's RMC manual focus line, produced from the late 1970s into the 1980s. It covered a useful wide-to-short-telephoto range for 35mm SLR users wanting a single all-purpose travel and portrait lens.
The one-touch barrel combines zoom and focus in a single ring, with a built-in macro mode engaged past the closest normal focus setting. Aperture runs from f/3.5 at 35mm to f/4.5 at 105mm, and the barrel carries Tokina's RMC multi-coating for the period's flare control standards.
Optically it is soft in the macro range and at the long end wide open, improving markedly stopped down to f/8. Its main appeal is versatility rather than outright sharpness, functioning as a walk-around lens that also handles close-up work without extra accessories.
These turn up regularly in M42, Pentax K, Canon FD, Nikon F, Minolta MD, Olympus OM and Konica AR fittings. Buyers should test the macro-mode lock and one-touch zoom collar for looseness, common on well-used copies, and check for fungus in the macro helicoid.