Canon EF Lenses
76 interactive lens diagrams
Canon EOS SLR and DSLR mount, introduced in 1987 | 35 mm film and full-frame digital, with APS-C EF-S lenses using the same register but a deeper rear envelope
Canon EF was a decisive break from the mechanical FD system. Every aperture and focus command is electronic, and autofocus motors live in the lens rather than the camera body. That architecture let Canon introduce ring-type USM telephotos, image-stabilized lenses, diffractive-optics experiments, and a broad professional DSLR lens family without maintaining older mechanical couplings.
The mount's 54 mm throat and 44 mm SLR flange distance make it a classic full-frame reflex platform: generous enough for fast L-series primes and telephotos, but still constrained by mirror clearance for wide-angle designs. EF-S later used the same register and an EF-derived interface for APS-C cameras, but EF-S lenses could project farther into the mirror box and were mechanically keyed away from full-frame bodies. That distinction matters when a patent formula is EF-compatible in one version and crop-only in another.
EF is also a good example of a camera maker treating the lens as a controlled electromechanical module. Ultrasonic motors, optical stabilization, electronic diaphragms in later lenses, and distance reporting could evolve without changing the basic bayonet. In this catalog, EF lenses represent Canon's mature autofocus SLR era before the shorter-flange RF mirrorless system, and they are especially useful for comparing late reflex optical correction against mirrorless successors that no longer need to preserve the same back-focus envelope.
Mount interface
Flange focal distance 44 mm, bayonet mount. 0° at 12 o'clock from the camera front; the lens-side view is the horizontal mirror. Dotted strokes mark photo-scaled or schematic (not-to-scale) dimensions.
Throat / openingMount ringBayonet lug / slotLock pin / notchIndex markElectrical contactScrews / sealsDatum & axis
CANON EF 100-300mm f/4.5-5.6 USM— 13 ELEMENTS / 10 GROUPS, 100-300mm MARKETED, PATENT EX. 3: 103.35-291.85mmCANON EF 100-300mm f/5.6— 15 ELEMENTS / 9 GROUPS, 100-300mm f/5.6 (MARKETED), PATENT STATES: 69 / 100 / 198 / 290 mmCANON EF 100-400mm f/4.5-5.6 L IS II USM— 21 ELEMENTS / 16 GROUPS, PATENT ZOOM POINTS 102.79-389.03 mm, MODELED EFL 102.758-388.939 mmCANON EF 100-400mm f/4.5-5.6 L IS USM— 17 ELEMENTS / 14 PHYSICAL GROUPS, PATENT f = 102.68 / 161.53 / 389.19 mm, PATENT FNO = 4.6 / 5.1 / 5.8CANON EF 100mm f/2.8 L Macro IS USM— 15 elements / 12 groups, f = 99.996 mm design, F/2.92 design, f/2.8 marketedCANON EF 100mm f/2.8 Macro— 10 ELEMENTS / 9 GROUPS, 100mm f/2.8 (marketed), F/2.89 DESIGNCANON EF 11-24mm f/4 L USM— 16 elements / 11 groups, 11-24 mm f/4 marketed; 11.33-23.28 mm F/4.12 patent design, 4 aspherical elements / 4 aspherical surfacesCANON EF 135mm f/2 L USM— 10 ELEMENTS / 8 GROUPS, 135 mm f/2 (marketing), f = 133.495 mm / F2.0598 (design)CANON EF 135mm f/2.8 Soft Focus— 7 ELEMENTS / 6 GROUPS, 135.043 mm DESIGN EFL, f/3.341 SHARP / f/2.8 SOFTCANON EF 14mm f/2.8 L USM— 14 ELEMENTS / 10 GROUPS, f = 14.201 mm, F/2.8 (DESIGN 1:2.892)CANON EF 15mm f/2.8 Fisheye— 8 ELEMENTS / 7 GROUPS, PATENT F = 15.3 mm, TRACED EFL = 15.2865 mmCANON EF 180mm f/3.5 L Macro USM— 14 ELEMENTS / 12 GROUPS, 180mm f/3.5 MARKETED, f = 180.009 mm / f/3.6 DESIGNCANON EF 20-35mm f/2.8 L— 15 elements / 12 groups, 20.6-34.0 mm design zoom, f/2.8CANON EF 200-400mm f/4 L IS USM EXTENDER 1.4×— 24 ELEMENTS / 19 GROUPS (PATENT ACTIVE; REAR FILTER EXCLUDED), 200–400mm f/4 MARKETED, 205.00–389.99 mm / f/4.12 PATENT DESIGNCANON EF 200mm f/1.8 L USM— 10 POWERED ELEMENTS / 8 GROUPS (PATENT CORE), f ≈ 200.017 mm, f/1.86 PATENT DESIGNCANON EF 200mm f/2 L IS USM— 17 elements / 12 groups incl. filter; 16 powered elements rendered, f = 194.991 mm design; 200 mm marketed, F/2.05 design; f/2.0 marketedCANON EF 20mm f/2.8 USM— 11 elements / 9 groups, Patent EFL 20.498624 mm; retained at printed scale, f/2.8 marketed; f/2.9 patent designCANON EF 24-70mm f/2.8 L II USM— 18 elements / 13 groups, 24-70 mm f/2.8 marketed; 24.70-67.88 mm F/2.91 patent design, 3 aspherical elements / 4 aspherical surfacesCANON EF 24-70mm f/2.8 L USM— 16 elements / 13 groups, 24.90-68.14 mm patent design, f/2.8 nominal; F2.92 designCANON EF 24mm f/1.4 L II USM— 13 ELEMENTS / 10 GROUPS, f = 24.539 mm (DESIGN), f/1.4 MARKETED; f/1.45 PATENTCANON EF 24mm f/1.4 L USM— 11 ELEMENTS / 9 GROUPS, PATENT f = 24.6 mm, F/1.45, 2ω = 82.7°, 1 UD ELEMENT / 1 GROUND ASPHERICAL ELEMENTCANON EF 28-105mm f/3.5-4.5 II USM— 15 ELEMENTS / 12 GROUPS, PATENT EFL 28.903-101.333 mm, PATENT f/3.63-4.67CANON EF 28-105mm f/4-5.6— 10 ELEMENTS / 9 GROUPS, PATENT 28.91-101.32mm, MARKETED 28-105mm f/4-5.6CANON EF 28-135mm f/3.5-5.6 IS USM— 16 elements / 12 groups, 28-135mm f/3.5-5.6 marketed; 28.891-131.182mm patent design, 135 full-frame / Canon EFCANON EF 28-200mm f/3.5-5.6 USM— 16 GLASS SUBSTRATES / 12 GROUPS, DESIGN 28.92-193.14 mm, MODELED f/3.63-5.88CANON EF 28-70mm f/3.5-4.5 II— 10 ELEMENTS / 9 GROUPS, DESIGN EFL 29.083-67.894 mm, DESIGN f/3.6-4.6CANON EF 28-80mm f/3.5-5.6 II— 10 ELEMENTS / 10 GROUPS, COMPUTED EFL 28.9689-76.9612 mm, PATENT f/3.46-5.88CANON EF 28-90mm f/4-5.6 II USM— 10 elements / 8 air-spaced groups, 28-90mm f/4-5.6, Canon EF / 135 formatCANON EF 28mm f/2.8— 5 ELEMENTS / 5 GROUPS, f = 28.219 mm (MODELED), F/2.8CANON EF 28mm f/2.8 IS USM— 9 ELEMENTS / 7 GROUPS, DESIGN f = 28.60 mm, DESIGN F/2.86CANON EF 300mm f/2.8 L IS USM— 15 ACTIVE ELEMENTS / 11 GROUPS, MODELED EFL ≈ 293.600 mm, MODELED F/2.9CANON EF 35mm f/1.4 L USM— 11 ELEMENTS / 9 GROUPS, 35 mm MARKETED / 34.2948 mm DESIGN, f/1.4 MARKETED / f/1.45 DESIGNCANON EF 400mm f/2.8 L IS II USM— 15 ACTIVE ELEMENTS / 11 GROUPS (G FILTER EXCLUDED), PATENT f = 392.15 mm; COMPUTED EFL 392.2607 mm, PATENT F/2.90 / MARKETED 400mm f/2.8CANON EF 400mm f/2.8 L IS III USM— 16 active elements / 12 groups (rear filter omitted), Patent f = 392.00 mm; traced EFL = 391.938 mm, Design F/2.90; 2ω = 6.32°CANON EF 400mm f/2.8 L IS USM— 400mm f/2.8 (marketed), Patent f = 392.15 mm, F/2.9, 17 elements / 13 groups marketed; 16 / 12 modeled after rear-filter omissionCANON EF 400mm f/4 DO IS USM— US 2002/0015231 A1 — Example 1, 15 modeled elements / 11 active groups, Design f = 392.025 mm, F/4.12CANON EF 40mm f/2.8 STM— 6 ELEMENTS / 4 GROUPS, f ≈ 39.0 mm, F/2.8CANON EF 500mm f/4 L IS USM— 15 MODELED ELEMENTS / 11 GROUPS, PATENT f = 490.56 mm; ARRAY EFL ≈ 491.36 mm, F/4.1 DESIGN / f/4 MARKETEDCANON EF 50mm f/1.0 L USM— 11 ELEMENTS / 9 GROUPS, f ≈ 50.0 mm, F/1.0CANON EF 600mm f/4 L IS II USM— 15 ACTIVE ELEMENTS / 11 GROUPS, f = 584.82 mm (MODELED), F/4.12 DESIGNCANON EF 600mm f/4 L IS III USM— 17 ELEMENTS / 13 GROUPS PRODUCTION; 16 / 12 ACTIVE MODEL, 600mm f/4 MARKETED, f ≈ 587.93 mm / F4.12 DESIGNCANON EF 600mm f/4 L IS USM— 15 modeled elements / 11 groups, Patent f = 585.20 mm; computed EFL ≈ 585.328 mm, Design F/4.12; marketed f/4CANON EF 70-200mm f/2.8 L IS II USM— 23 elements / 19 groups, Patent f = 72.14-193.97 mm, Patent FNO = 2.9; marketed f/2.8CANON EF 70-300mm f/4-5.6 L IS USM— 19 elements / 14 groups, 72.20–290.00 mm design EFL, f/4.20–5.86 design apertureCANON EF 70-300mm f/4.5-5.6 DO IS USM— 17 ELEMENTS / 14 AIR-SPACED ASSEMBLIES, 7 FUNCTIONAL ZOOM GROUPS, DESIGN 72.10-290.07 mmCANON EF 8-15mm f/4 L Fisheye USM— 14 elements / 11 groups, 8-15 mm marketed; 8.05-15.14 mm design, f/4 marketed; F/4.12 patent designCANON TS-E 135mm f/4L MACRO— 11 elements / 7 groups, f = 132.97 mm design (135 mm marketed), F/4.05 design (f/4 marketed)CANON TS-E 50mm f/2.8L MACRO— 12 elements / 9 groups, f = 51.40 mm design, F/2.88 design; marketed f/2.8CANON TS-E 90mm f/2.8L MACRO— 11 elements / 9 groups, Patent f = 55.986 mm; scaled ×1.60754, Computed scaled EFL ≈ 89.96 mmLAOWA 15mm f/4 Wide Angle 1:1 Macro— 12 ELEMENTS / 9 GROUPS, f = 16.00 mm, F/4.1LAOWA 24mm f/14 2× Macro Probe— 27 ELEMENTS / 19 GROUPS, f ≈ 23.7 mm, F/14MINOLTA AF 28-75mm f/2.8 (D)— 28-75mm f/2.8, 16 elements / 14 groups, 4 hybrid aspherical surfacesSIGMA 105mm f/1.4 DG HSM | Art— 17 elements / 12 groups, f = 101.85 mm design, F1.46 design / f/1.4 nominalSIGMA 14-24mm f/2.8 DG HSM | Art— 17 elements / 11 groups, 14.50-23.15 mm design, F2.93 design / F2.8 marketedSIGMA 20mm f/1.4 DG HSM | Art— 15 elements / 11 groups, Patent f = 20.69 mm, Patent F1.46; marketed F1.4SIGMA 30mm f/1.4 DC HSM | Art— 9 elements / 8 groups, f = 30.785 mm design, F1.4 marketed / F1.46 designSIGMA 35mm f/1.4 DG HSM | Art— 13 elements / 11 groups, f = 35.16 mm design, F1.45 design / F1.4 marketedSIGMA 50mm f/1.4 DG HSM | Art— 13 elements / 8 groups, f = 49.58 mm design, F1.4 nominal / F1.46 designSIGMA 85mm f/1.4 DG HSM | Art— 14 ELEMENTS / 12 GROUPS, f ≈ 83.4 mm, F/1.46SIGMA APO Macro 105mm f/2.8 EX DG OS HSM— 16 elements / 11 groups, 105 mm marketed; 101.71 mm design, F2.8 marketed; F2.91 designSIGMA APO MACRO 150mm f/2.8 EX DG OS HSM— 19 elements / 13 groups, f = 149.99 mm design / 150 mm nominal, F2.92 design / F2.8 nominalSIGMA APO Macro 180mm f/2.8 EX DG OS HSM— 19 elements / 14 groups, 180 mm f/2.8 marketed; 174.60 mm f/2.92 design, 0.47 m MFD / 1:1 macroTAMRON 18-400mm f/3.5-6.3 Di II VC HLD— 16 ELEMENTS / 11 GROUPS, 18-400mm MARKETING / 18.5105-389.00mm PATENT, MODELED F/3.4059-6.4828TAMRON 28-300mm f/3.5-6.3 Di VC PZD— 19 ELEMENTS / 15 GROUPS, 28-300mm marketed; 28.776-291.262mm patent states, FNO 3.628 / 3.628 / 6.459 modeledTAMRON AF 28-200mm SUPER XR f/3.8-5.6 Aspherical [IF] MACRO— 28-200mm marketing / 29.07-193.0mm patent design, 15 PHYSICAL LENS PIECES / 14 GROUPS, 3 COMPOSITE ASPHERICAL LENSESTAMRON AF 28-300mm f/3.5-6.3 XR Di LD Aspherical [IF] MACRO— 28-300mm marketed / 28.9958-289.5284mm modeled, f/3.5-6.3 marketed / f/3.5000-6.5122 modeled wide-open, 13 groups / 15 physical lens piecesTAMRON SP 150-600mm f/5-6.3 Di VC USD (A011)— 20 ELEMENTS / 13 GROUPS, PATENT ZOOM POINTS 152.1633-582.5200 mm, MODELED F/4.99415-6.54062TAMRON SP 24-70mm f/2.8 Di VC USD— 17 physical elements / 12 groups (18 modeled media), 24.7-67.799 mm design / 24-70 mm marketed, F/2.9 design / f/2.8 marketedTAMRON SP 70-200mm f/2.8 Di VC USD— 23 ELEMENTS / 17 GROUPS, 70-200mm f/2.8 (MARKETING), 71.800-194.500mm F/2.90 (PATENT DESIGN)TAMRON SP 70-300mm f/4-5.6 Di VC USD— 17 ELEMENTS / 12 GROUPS, DESIGN 71.75–292.00mm, MODELED f/4.122–5.853TAMRON SP 90mm f/2.8 Di MACRO 1:1 VC USD (F004)— 14 ELEMENTS / 11 GROUPS, f = 92.556 mm (COMPUTED), F/2.89 DESIGN / f/2.8 MARKETEDTAMRON SP AF 180mm f/3.5 Di LD [IF] MACRO 1:1 (B01)— 14 ELEMENTS / 11 GROUPS, PATENT f = 176.9587 mm; DATA SCALED TO 180 mm, F/3.5 (PATENT FNO 3.536)TAMRON SP AF 200-500mm f/5-6.3 Di LD [IF]— 13 ELEMENTS / 10 GROUPS, 200-500mm f/5-6.3, 2 LD ELEMENTSTAMRON SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] MACRO— 16 ELEMENTS / 14 GROUPS, DESIGN f = 28.87-72.65 mm, DESIGN F/2.91TAMRON SP AF 60mm f/2 Di II LD [IF] MACRO 1:1 (G005)— 14 ELEMENTS / 10 GROUPS, 60mm f/2 (MARKETED), f = 61.500mm, FNO. = 2.06 (PATENT)TAMRON SP AF 70-200mm f/2.8 Di LD [IF] MACRO— 18 ELEMENTS / 13 GROUPS, 70-200mm f/2.8 (MARKETING), 71.50-194.00mm F/2.88 (PATENT DESIGN)