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Sigma 28-105mm f/2.8 DG DN A (Art) Full-Frame Autofocus Lens for Leica L-Mount, Black {82}

Model #392707
  • $1,566.00

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New in box complete with manufacturer's USA warranty. Not previously owned or used.
Essentially new with no signs of use. “Open box.” In manufacturer's packaging with original accessories and instructions. 180-day warranty.
Barely used with virtually no traces of wear. Only the closest inspections will reveal slight use. Lens glass could contain light dust or debris. Excellent picture quality. Accessories usually not included, unless noted in listing. 180-day warranty.
Lightly used with limited signs of wear. Exceptionally nice but may have slight wear on finish visible. Lens glass could contain light dust or debris. Excellent picture quality. Accessories usually not included, unless noted in listing. 180-day warranty.
Noticeably used with average signs of wear. Shows moderate wear for the age of the item, with the possibility of blemishes and/or minimal dings. Lens glass may have average dust and zoom/focus ring tension may have slight looseness or tightness overall, but will not affect picture quality. Accessories usually not included, unless noted in listing. 180-day warranty.
Frequently used with above-average wear. May have dents, dings, or finish loss. Lens glass may have small scratches, dust, and blemishes, and zoom/focus ring tension may have moderate looseness or tightness overall, but should not affect picture quality. Accessories usually not included, unless noted in listing. 180-day warranty.
Heavily used with extensive visible wear. Equipment is rough, with multiple impressions in the finish, excessive finish loss and brassing. Glass will have marks, fungus and/or heavy/cloudy haze which could affect picture quality. Accessories usually not included, unless noted in listing. Not covered under KEH warranty.
Non-functional or damaged. Equipment will not work. Usable for parts. Not covered under KEH warranty and non-returnable.
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Sigma 28-105mm f/2.8 DG DN Art: one fast zoom for L-Mount shooters

A constant f/2.8 across the full 28-105mm range is the core appeal here. At the wide end you have enough field of view for environmental portraits and architecture; zoom to 105mm and you are in solid headshot and compressed-perspective territory. That single aperture stays put regardless of where you sit in the range, which matters when you are moving fast and cannot afford exposure shifts between shots.

The HLA (High-response Linear Actuator) autofocus motor is built specifically for mirrorless operation, delivering quiet, precise focus pulls that are useful for both stills and video work. The 12-blade rounded diaphragm keeps out-of-focus areas circular than polygonal, a detail that matters in images with prominent specular highlights. Minimum focus distance holds at 15.8 inches across the entire zoom range, so you can get genuinely close to a subject at 105mm without switching lenses. A dust- and splash-resistant construction with a water- and oil-repellant coating on the front element means the lens handles field conditions that would concern you with less rugged optics. For L-Mount shooters who want to consolidate a kit around a single workhorse zoom, the Art-series pedigree and the f/2.8 constant aperture make this a credible answer.

Who It's For

Event and wedding photographers working L-Mount systems will appreciate the f/2.8 constant aperture across 28-105mm, giving them wide-to-telephoto coverage without swapping glass in low light. Documentary and travel shooters benefit from the 15.8-inch minimum focus distance at every focal length, letting them work close when a scene demands it. Video-focused shooters running Leica SL or Lumix S bodies will find the HLA motor's quiet operation keeps focus pulls out of the audio track. Portrait photographers get 105mm reach at f/2.8 with a 12-blade rounded diaphragm that keeps background rendering smooth.

Key Features

  • Constant f/2.8 aperture across entire 28-105mm zoom range
  • HLA autofocus motor designed for mirrorless systems with quiet operation
  • 12-blade rounded diaphragm for circular bokeh
  • 15.8-inch minimum focus distance maintained throughout zoom range
  • Dust and splash-resistant construction with water and oil-repellant front coating
  • Leica L-Mount for full-frame mirrorless
  • Art-series optical formula
  • 82mm filter thread

FAQ

What aperture do you get at 105mm on this lens?
f/2.8 across the entire range - no stopping down as you zoom. That's the whole point of this lens for video and fast stills work.
Can you focus close at 105mm?
Yes. Minimum focus distance is 15.8 inches at any focal length, so you can shoot tight headshots without a macro lens or extension tube.
How does the autofocus perform for video?
The HLA motor is built for mirrorless video work - it's quiet and won't hunt, which keeps your audio clean and your focus pulls smooth.
What's the deal with the rounded diaphragm?
12 blades, rounded edges. This keeps bokeh circular instead of polygonal, which matters when you have bright specular highlights in the frame.
Is this lens weather-sealed?
It has dust and splash resistance with a water- and oil-repellant coating on the front element. Field-rated but not fully sealed like a pro telephoto.
What filter size do I need?
82mm. Standard size for a lens in this class.
SpecificationValue
Focal Length28-105mm
Max Aperturef/2.8
MountLeica L-Mount
Aperture TypeConstant
Filter Thread82mm
Min Focus Distance15.8 inches
Autofocus MotorHLA (High-response Linear Actuator)
Diaphragm Blades12
Diaphragm ShapeRounded

This description was generated using AI based on KEH's internal product standards, product expertise, and knowing what customers care about most. While we strive for accuracy, details may vary by individual item.

Brand Name Sigma
Filter Size 82mm
Lens Mount Leica L-Mount
Max Focal Length 105mm
Min Focal Length 28mm