Canon's early aspherical FD wide zoom — the 24-35mm f/3.5 S.S.C. Aspherical.
The Canon FD 24-35mm f/3.5 S.S.C. Aspherical was introduced in 1978 as an early aspherical wide-angle zoom in the first FD generation, carrying Super Spectra Coating. It was among Canon's pioneering aspherical zooms and gave FD users a compact wide zoom covering ultra-wide to moderate wide focal lengths.
This is a manual-focus Canon FD lens with a 24-35mm zoom range and a constant maximum aperture of f/3.5 across the range. It uses an aspherical element to control distortion and aberrations, carries Canon's Super Spectra multi-coating, and has focus, zoom and aperture set manually on the barrel.
The 24-35mm range spans wide-angle framing from expansive to moderate, useful for landscapes, interiors and street work in a single lens. The constant f/3.5 aperture holds exposure steady through the zoom, and the aspherical design helps keep straight lines rectilinear and distortion controlled across the range.
On the used market this early aspherical wide zoom is valued for its optics and compactness. Check the complex glass for haze, fungus and separation, test the zoom and focus for smoothness, and confirm the aperture blades are clean and dry. Inspect the front element for marks, and note it adapts to mirrorless via an optics-free FD adapter.