Canon Canon 20mm f2.8 Heritage

Overview

The Canon 20mm f/2.8 in FD mount traces to Canon's ultra-wide FD lineup that began with the FD 20mm f/2.8 S.S.C. released in March 1973, one of the first serious ultra-wide primes Canon offered. The S.S.C. designation refers to Canon's Super Spectra Coating, a high-grade multi-coating introduced in the early 1970s to reduce flare and ghosting and to improve contrast, color rendering, and light transmission over the standard S.C. coating. The design was later carried into the New FD (NFD) era, with the Canon New FD 20mm f/2.8 arriving in 1979 as a lighter, restyled evolution (9 groups / 10 elements, 305g). Notably, Canon never gave the 20mm the aspherical (ASPH) treatment that made siblings like the FD 24mm f/1.4 S.S.C. ASPH so rare and expensive, which kept the 20mm relatively affordable. No established nickname exists for this lens. Its cult following rests on being an affordable, lightweight, fast (f/2.8) ultra-wide with excellent sharpness and pleasing, slightly vintage rendering that adapts beautifully to modern mirrorless bodies like the Sony A7.

Verdict: The Canon FD 20mm f/2.8 is an affordable, lightweight, and genuinely sharp ultra-wide that punches above its price. It's ideal for landscape and architecture shooters who work stopped down, film enthusiasts wanting a fast wide with slightly vintage rendering, and mirrorless adapters seeking a characterful ultra-wide. Just accept the minor moustache distortion and the large 72mm filter thread as the price of admission.

Optical Character

Bokeh

Quite nice for an ultra-wide, pleasing especially when the background is not too busy.

Color

Pleasing color rendering with a slightly vintage feel, aided by S.S.C. coating.

Sharpness wide open

Very sharp overall with excellent corner sharpness stopped down (f/8-16); acceptable but softer wide open.

Flare resistance

Flare common for the focal length; S.S.C. coating designed to reduce flare and ghosting.

Contrast

Excellent contrast reported, particularly stopped down, credited to S.S.C. multi-coating.

Community Insights

What people love

Very sharp with excellent contrast and overall image quality, especially for landscapes stopped down to f/8-16
Affordable ultra-wide entry point (roughly $250-$350), making it a great starter UWA
Lightweight yet well built, and fast at f/2.8 for a wide angle
Pleasing rendering with a slightly vintage color character and surprisingly nice bokeh for an ultra-wide
Adapts excellently to modern mirrorless bodies like the Sony A7 and A7-series, performing well even on full-frame digital
S.S.C. Super Spectra Coating gives good color rendering and contrast

What people dislike

Minor moustache distortion
Large 72mm filter thread that some feel is unnecessarily big for the focal length and adds bulk/cost of filters
Softer performance and coma/very minor smear wide open, making it less ideal for astrophotography unless stopped down
Lacks the built-in filters of the 15mm f/2.8, forcing users to carry multiple 72mm filters
No aspherical version was ever made

Pro Tips

Stop down to f/8-f/16 for peak sharpness and corner-to-corner performance in landscapes and architecture
For astrophotography, stop down to control coma and the very minor smear seen wide open
Adapts well to mirrorless (e.g. Sony A7) via FD adapter for full-frame use
Pair it with color-shifting film like Lomochrome Purple or Turquoise for creative ultra-wide looks
Budget for a set of 72mm filters since it lacks built-in filters

Sources (1)

Web-grounded synthesissecondary

The Canon 20mm f/2.8 in FD mount traces to Canon's ultra-wide FD lineup that began with the FD 20mm f/2.8 S.S.C. released in March 1973, one of the first serious ultra-wide primes Canon offered. The S.S.C. designation refers to Canon's Super Spectra Coating, a high-grade multi-coating introduced in the early 1970s to reduce flare and ghosting and to improve contrast, color rendering, and light transmission over the standard S.C. coating. The design was later carried into the New FD (NFD) era, with the Canon New FD 20mm f/2.8 arriving in 1979 as a lighter, restyled evolution (9 groups / 10 elements, 305g). Notably, Canon never gave the 20mm the aspherical (ASPH) treatment that made siblings like the FD 24mm f/1.4 S.S.C. ASPH so rare and expensive, which kept the 20mm relatively affordable. No established nickname exists for this lens. Its cult following rests on being an affordable, lightweight, fast (f/2.8) ultra-wide with excellent sharpness and pleasing, slightly vintage rendering that adapts beautifully to modern mirrorless bodies like the Sony A7.

https://www.canonclassics.com/canon-nfd-20mm-f2.8/10-60/https://www.canonrumors.com/a-history-lesson-on-canon-20mm-lenses/https://www.kenrockwell.com/canon/lenses/20mm.htmhttps://www.the-digital-picture.com/Reviews/Canon-EF-20mm-f-2.8-USM-Lens-Review.aspx