Sigma 24-70mm f/2.8 DG DN A (Art) Autofocus Lens for Leica L-Mount, Black {82}

Sigma's Art-grade 24-70mm f/2.8 built for mirrorless full frame.

The 24-70mm f/2.8 is the workhorse zoom for a reason: it covers the most-used focal lengths in one barrel without surrendering a stop of light. Sigma's DN construction means the optical formula was engineered from scratch for short-flange mirrorless systems than adapted from a DSLR design, which pays dividends in corner sharpness across the full-frame image circle and more compact overall dimensions. The linear AF motor drives focus quickly and quietly, a meaningful advantage when shooting video or working close to subjects who shouldn't hear mechanical noise.

The aperture ring with its lockable Auto position gives L-mount shooters a tactile way to control exposure that many electronic-only interfaces don't offer. Weather sealing and a zoom lock switch make this a credible travel and event lens, not just a studio piece. At 82mm filter thread, you're stepping up to larger glass, which reflects the f/2.8 constant aperture the lens maintains across the entire zoom range. Sigma's Art series has a track record for delivering optical performance that competes above its price tier, and this lens carries that same design priority into the L-mount ecosystem.

Who It's For

Wedding and event photographers working the Leica SL or Panasonic S series get a single lens that handles wide ceremony shots at 24mm and tighter portrait framing at 70mm, all at f/2.8 in mixed or low light. Documentary and travel shooters benefit from the weather sealing and zoom lock, which keeps the barrel from creeping in a bag. Video-focused users on L-mount bodies will appreciate the linear motor's quiet, smooth focus pulls. Portrait photographers gain a fast aperture at the long end that produces genuine subject separation on full-frame sensors.

Key Features

• DN (Designed for Mirrorless) optics engineered specifically for short-flange L-mount
• f/2.8 constant aperture across entire 24-70mm focal range
• Linear autofocus motor delivers fast and quiet focus performance
• Art-series optical design for corner-to-corner sharpness and contrast
• Lockable aperture ring with Auto position for tactile exposure control
• Weather-sealed construction with zoom lock switch for field durability
• 82mm filter thread accommodates larger front optics

FAQ

Is this a DSLR lens adapted for mirrorless, or built from scratch for L-mount?

Built from scratch. The DN designation means Sigma engineered the optics specifically for the short flange distance of mirrorless systems rather than adapting a DSLR design, which tightens corner sharpness and keeps the overall package more compact.

Does the aperture stay constant at f/2.8 throughout the zoom range?

Yes. F/2.8 is maintained from 24mm through 70mm, which is why the filter thread is a substantial 82mm.

How does the autofocus perform for video work?

The linear AF motor is fast and quiet, making it suitable for video where focus noise and hunting would otherwise be distracting. It's a practical advantage over gear-driven alternatives.

What's the aperture ring lock for?

The lockable Auto (A) position lets you switch between manual aperture control and electronic auto-exposure without fumbling through menus. It's a tactile control that L-mount shooters appreciate, especially in changing light.

Is this lens sealed against weather?

Yes, it's weather-sealed for dust and moisture, and includes a zoom lock switch to prevent creep when packed in a bag. Solid enough for travel and event work, though not ice-rated.

What's the filter thread size?

82mm. It's larger than typical 24-70mm zooms because of the constant f/2.8 aperture and DN optical design.