Sigma 105mm f/1.4 DG HSM A (Art) Full-Frame Autofocus Lens for Sony E-Mount, Black {105} with Tripod Collar

Sigma's 105mm f/1.4 Art: the portrait lens built like a tank

At 105mm and f/1.4, this lens occupies a specific and well-argued position: long enough to compress backgrounds into smooth separation, fast enough to shoot in genuinely low light without compromise. The 9-blade rounded diaphragm produces out-of-focus rendering that portrait shooters have trusted for years. Sigma's optical formula, 17 elements across 12 groups, including 3 FLD, 2 SLD, and 1 aspherical element, was designed to push full-frame resolution to its limit while keeping longitudinal chromatic aberration in check at wide apertures.

The magnesium alloy body weighs in at 1,645 g, and with a 116mm diameter and 105mm filter thread, this is not a lens you'll forget you're carrying. The tripod collar is included and genuinely useful given the mass. Weather and dust sealing make it workable in field conditions where you'd not worry about the gear. HSM autofocus is ring-type ultrasonic with full-time manual override, and the internal focus design means the front element doesn't rotate, a practical detail when using polarizers or graduated ND filters.

Sigma's Art line has a well-established reputation for optical performance that competes with first-party glass at a different price point. For Sony FE shooters who want a dedicated 105mm portrait prime, this is a mature, proven tool.

Who It's For

Portrait photographers working on location or in studio will find the f/1.4 aperture and 105mm focal length combine into a subject-to-background separation that shorter primes simply can't replicate at equivalent distances. Event photographers dealing with dim reception halls or late-afternoon outdoor ceremonies get a legitimate low-light option without switching to a zoom. Sports photographers covering sidelines or podiums, scenarios with predictable, mid-range distances, can work with the internal focus HSM motor and benefit from the tripod collar when shooting sustained bursts from a monopod. Landscape and outdoor photographers who also shoot environmental portraiture will appreciate the weather sealing paired with the aspherical and SLD optical elements that hold up to backlit or contrasty conditions.

Key Features

• 105mm prime with f/1.4 max aperture for portrait compression and low-light performance
• 17 elements across 12 groups with 3 FLD, 2 SLD, and 1 aspherical element
• Ring-type ultrasonic HSM autofocus with full-time manual override and internal focus
• 9-blade rounded diaphragm for smooth out-of-focus rendering
• Magnesium alloy construction with weather and dust sealing
• Included tripod collar and lens hood
• 105mm filter thread, 1.0m minimum focus distance

FAQ

Is this lens weather-sealed?

Yes. Magnesium alloy body with weather and dust sealing throughout - it handles field conditions without fuss, though it's not submersible.

How does autofocus perform on Sony E-mount bodies?

Ring-type ultrasonic HSM motor is fast and quiet. Full-time manual override lets you tweak focus without switching modes, and internal focusing means the front element stays still for polarizers and grads.

What's the background separation like at f/1.4?

At 105mm and f/1.4, you get genuine subject isolation. The 9-blade rounded diaphragm renders out-of-focus areas smoothly - no harsh aperture blades in the bokeh.

Can I use this lens with a tripod?

Yes. The included tripod collar is built in and designed to handle the lens's 1,645g weight - it's not an afterthought.

What's the closest focus distance?

1.0 meter (39.37 inches) at a 0.12x magnification ratio. Not a macro lens, but close enough for tight framing on portraits without backing up.

How much does this lens weigh?

1,645 grams (3.63 lb). It's substantial - magnesium construction and 17 elements add up. You'll know you're carrying it.

Does the front element rotate during focusing?

No. Internal focus design keeps the front element stationary, so graduated ND filters and polarizers stay in place without adjustment.