Sigma — manual-focus 35-135mm f/3.5-4.5 versatile mid-range zoom, multiple SLR mounts
Sigma's 35-135mm f/3.5-4.5 was a versatile manual-focus zoom from the 1980s, covering wide-angle through short telephoto in one lens for photographers who wanted fewer lens changes without an autofocus body.
The lens spans 35mm to 135mm with a maximum aperture narrowing from f/3.5 to f/4.5, manually focused and zoomed. Sigma built it for Canon FD, Nikon F, Pentax K, Minolta MD, Olympus OM, M42, Konica AR and Contax/Yashica mount SLRs, with multi-coated glass in a mostly metal barrel typical of its mid-tier catalog zooms.
Its wide range made it a practical single-lens option for travel and general photography, at the cost of a large, heavier barrel compared with narrower-range zooms, plus some barrel distortion at 35mm and softening toward 135mm wide open.
Turns up regularly secondhand at low prices in most mounts. Check the long zoom throw for smooth, even travel, examine elements for haze or fungus, and confirm the aperture ring clicks cleanly through its full range without sticking.