Tamron SP AF 20-40mm F/2.7-3.5 ASPH [IF] 166D

Specifications01

MountCANON EF

Focal length20-40mm

Max aperturef/2.7

TypeZoom

Release year1994

Weight525 g

Filter size77 mm

Min focus distance0.5 m

Max magnification0.098

Aperture blades6

Optical elements15

Groups12

Min aperturef/3.5

AutofocusYes

StabilizationNo

Aperture controlNone The aperture is controlled from the camera(Canon EF, Minolta/Sony A) Aperture ring (Manual settings + Auto Exposure setting)(Nikon F)

Lens hoodC0FH - Bayonet-type petal-shaped

EraFilm era

Production statusDiscontinued

Additional Info02

Lens TypeWide-angle zoom lens

Field Notes02

Tamron SP AF 20–40mm zoom for Canon EF cameras, with a variable max aperture of f/2.7–3.5. Intended for general-purpose wide-to-standard shooting (e.g., landscapes and low-light).

AI-assisted summary — verify against linked sources

Catalog note · source: thelensdb

Sources03

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Other Mounts03

This lens family is also indexed in 2 other mounts.

MINOLTA/SONY AView lens

Tamron SP AF 20-40mm F/2.7-3.5 ASPH [IF] 166D

20-40mmf/2.7

NIKON FView lens

Tamron SP AF 20-40mm F/2.7-3.5 ASPH [IF] 166D

20-40mmf/2.7