EF 40mm f/2.8 STM

A unique and indispensable addition to Canon's series of EF lenses, the new EF 40mm f/2.8 STM offers an ultra-slim and lightweight design. Incredibly compact in size, the EF 40mm f/2.8 STM delivers high image quality from the center to the periphery thanks to its advanced lens configuration including an aspherical element, a bright 2.8 aperture, and optimized coatings that minimize ghosting and flare while providing exceptional color balance. The EF 40mm f/2.8 STM's unobtrusive design helps the photographer avoid overwhelming their subjects with a large lens and to remain discreet in sensitive shooting situations with no compromise in performance. Its diminutive design is complemented by features such as a newly developed stepping motor for smooth and quiet continuous AF while capturing video with the Canon EOS Rebel T4i DSLR, a circular aperture (7 blades) for beautiful soft-focus backgrounds, and a short minimum focusing distance of only 0.98 ft./0.30 m.

Pancake lens with a thickness of about 22.8mm

An ultra-compact and lightweight design , with a diameter of 68.2mm , a thickness of 22.8mm and weighing 130g making it the slimmest and lightest EF lens produced . A fast f/2.8 aperture , 7-blade circular aperture and aspherical lens elements result in high level of image quality from center to corner of image.

• Focal length and maximum aperture: 40 mm 1:2.8
• Lens construction: 6 elements in 4 groups Diagonal angle of view: 57° 30’
• Focus adjustment: STM (Gear type), overall linear extension system, full-time manual focus
• Closest focusing distance: 0.3 m/ 1.0 ft., 0.18 x magnification Filter size: 52 mm
• Max. diameter x length, weight: ø 68.2 x 22.8 mm, 130 g/ 2.7” x 0.9”, 4.6 oz.

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MTF Chart

1/40sec., f/2.8

Lens Construction
Aspherical Lens

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