The Canon 2520A004 is a 135 mm telephoto prime lens made for Canon EF mount cameras. It sits in Canon’s L-series, which means the optics, mechanics, and weather seals meet the brand’s top professional standards. Photographers choose this lens when they want extra reach without giving up a bright f/2 aperture, a combination that excels in portrait studios, indoor sports arenas, and stage performances where light can be scarce and backgrounds need to melt away.
The wide f/2 opening gathers plenty of light, so shutter speeds stay high and ISO settings stay low. That same aperture also creates a shallow depth of field, turning busy settings into creamy out-of-focus backdrops while keeping eyes and facial features tack sharp. Two ultra-low dispersion elements sit inside the optical path and control color fringing, so hairlines, jewelry, and high-contrast edges appear clean and accurate.
Canon applies its Super Spectra coating to suppress flare and ghosting. Whether you shoot against backlights at sunset or deal with spotlight glare on a stage, contrast and color stay consistent across the entire frame. This coating pairs with the lens’s internal baffling to maintain deep blacks and true mid-tones, which is especially valuable when delivering prints or high-end retouching work.
Focusing runs on a ring-type Ultrasonic Motor. The drive locks onto subjects quickly and in near silence, making it practical for wedding ceremonies, documentary work, or any environment where a noisy lens would be a distraction. Full-time manual override is always ready; a slight touch of the focusing ring lets you refine critical focus without flipping a switch.
A weather-resistant barrel and a metal mount give the lens the durability needed for long days on location. Light rain, dusty trails, or humid rehearsal halls are less of a worry because seals help keep contaminants out. When you need even more reach, the lens works with Canon’s 1.4× and 2× teleconverters, turning it into roughly a 190 mm or 270 mm lens while preserving autofocus and metering functions on compatible bodies.
Portrait specialists, sports shooters, and photojournalists will appreciate the blend of optical clarity, dependable autofocus, and rugged design. Whether you spend the day chasing perfect bokeh in golden light or freezing action under dim gym lights, this lens holds its own and delivers consistent, professional results.
Highlights:
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135mm focal length provides the perfect working distance for portraits and indoor sports
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Bright f/2 maximum aperture for exceptional low-light shooting and stunning subject isolation
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Two Ultra-Low Dispersion (UD) elements to minimize chromatic aberration
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Super Spectra coating reduces flare and preserves contrast
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Ring-type Ultrasonic Motor (USM) delivers fast, quiet autofocus with full-time manual override
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Weather-resistant construction ensures reliable performance in the field
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Compatible with Canon 1.4× and 2× EF teleconverters for extended reach
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Legendary L-series build quality designed to withstand professional demands
