Sony FE 12-24mm f/2.8 GM Full-Frame Autofocus Lens for E-Mount, Black (SEL1224GM)

Sony's 12-24mm f/2.8 GM: the widest constant-aperture full-frame zoom made.

No other full-frame zoom holds f/2.8 across a 12-24mm range. That distinction matters practically: at 12mm you're working with a 122-degree angle of view, and you never give up a stop of light as you zoom to 24mm. The optical formula behind this is serious, 17 elements in 14 groups, including three XA (Extreme Aspheric) elements ground to 0.01-micron surface precision, two Super ED elements, and three standard ED elements. That combination attacks chromatic aberration and field curvature from multiple directions, keeping resolution honest out to the image corners than just at center. Nano AR Coating II handles the internal reflection problems that plague wide zooms in contrasty light.

For focusing, four XD linear motors, two per focus group, drive a floating focus mechanism that keeps aberrations in check from the 28 cm minimum focusing distance all the way to infinity. The internal focus design means the lens stays 137 mm long regardless of focus position, which matters for gimbal work and underwater housing users. Rear gel filter compatibility solves the front-filter problem that the fixed hood and bulging front element would otherwise create. At 847 g, the weight is real, but there's no lighter way to get this focal range at this aperture on full-frame E-mount.

Who It's For

Astrophotographers shooting Milky Way compositions need f/2.8 at 12mm to pull in light without long exposures that trail stars, this lens delivers that without variable aperture compromises. Architectural and interior photographers benefit from the 122-degree field of view and floating focus mechanism that maintains edge sharpness at close focusing distances in tight spaces. Wedding photojournalists working in low-light reception halls can shoot 12mm at f/2.8 without spiking ISO past usable limits. Sports photographers adding an ultra-wide perspective, particularly for environmental action shots at close range, get fast AF tracking from the four XD linear motors paired with the constant f/2.8 exposure.

Key Features

• 12-24mm f/2.8 constant aperture, widest full-frame zoom with fixed aperture
• 17 elements in 14 groups with three XA Extreme Aspheric elements
• Nano AR Coating II reduces flare, ghosting, and internal reflections
• Four XD linear motors drive dual focus groups for fast tracking
• 137mm fixed length maintains balance on gimbals and in housings
• Rear gel filter compatibility solves front-filter limitations
• 28cm constant minimum focusing distance across entire zoom range
• 847g weight with full-frame coverage across 122° to 84° angle of view

FAQ

Is this really the widest constant-aperture full-frame zoom?

Yes. No other full-frame zoom maintains f/2.8 across a 12-24mm range. At 12mm you get a 122-degree angle of view without losing a stop of light as you zoom to 24mm.

How does Sony keep chromatic aberration controlled on such a wide zoom?

Three XA elements ground to 0.01-micron precision, two Super ED elements, and three standard ED elements attack the problem from multiple directions. That combination keeps color fringing minimal even in high-contrast scenes where wide lenses typically struggle.

What's the minimum focusing distance?

28 cm (11 inches) across the entire zoom range, maintained by a floating focus mechanism that minimizes aberrations at close distances.

Why does the constant 137mm length matter?

The fixed length means minimal center-of-gravity shift during focusing, which makes the lens balanced on gimbals and in matte boxes. Internal focus design also matters for underwater housings where changing lens length creates seal complications.

How do I use filters on this lens?

The bulging front element and fixed hood make front filters impossible. Instead, you insert sheet-type ND or color-correction filters into the rear filter holder. Sony supplies a cutting template.

What autofocus system does this use?

Four XD linear motors (two per focus group) deliver fast, precise tracking with minimal vibration. They're also power-efficient and contribute to longer battery life in cameras like the Alpha 9-series.

Can I use this in wet conditions?

The dust and moisture-resistant design handles challenging outdoor shooting, especially paired with a weather-sealed camera body. The fluorine front coating repels water and makes cleaning easier.