Canon FD 135mm f/2.5

Canon FD 135mm f/2.5 is Canon's medium telephoto prime in the FD lineup — the Canon counterpart to Nikon's 135mm f/2.8 AI-S, with a slightly faster maximum aperture. The 135mm focal length serves "tight portrait" and "stage candid" work where 85mm doesn't provide enough working distance.

Key features

• 135mm focal length on 35mm full-frame
• f/2.5 maximum aperture — slightly faster than the Nikkor 135/2.8 sibling
• 58mm filter thread
• FD bayonet
• 5-element design

Use case + rendering

• Tight portrait, stage candid, distant landscape detail
• Sharp wide-open at center; very sharp by f/4
• Compact for a 135mm telephoto

Compatible bodies

• All Canon FD bodies: F-1, New F-1, AE-1, AE-1 Program, A-1, T90

Related lenses

• Canon FD 85mm f/1.8 — shorter portrait alternative
• Canon FD 50mm f/1.4 — standard alternative