Sigma 105mm f/2.8 EX DG HSM OS Macro (1:1) Autofocus Lens for Nikon {62}

Sigma's proven 105mm macro with true 1:1 reach

The 105mm focal length has long been the standard for macro work, and Sigma's 105mm f/2.8 EX DG HSM earns its place in that conversation. At 0.31m minimum focus distance, you get genuine 1:1 magnification, meaning a 35mm subject fills the full frame. The floating focus mechanism maintains optical correction throughout the focus range, which matters when you're working at high magnification where even small aberrations become visible. The focus distance limiter restricts AF to beyond 0.4m, cutting hunt time when you're not shooting at macro distances.

The 8-blade diaphragm at f/2.8 maximum aperture gives portrait shooters a second reason to consider this lens. Background separation at medium distances is real and workable, not a side effect. The 11-element, 10-group optical formula is built to EX spec, Sigma's designation for their higher-grade construction. At 460g and 98mm in length, it's compact enough for field work without feeling fragile. The non-rotating 58mm filter thread is a practical detail that pays off when you're running a polarizer or any orientation-sensitive filter on the front.

For a lens with this much functional range, close-focus macro, portrait-length prime, general telephoto, buying into it at a non-current price point is a straightforward decision.

Who It's For

Macro photographers working with insects, botanical subjects, or small product details get 1:1 magnification and a floating focus mechanism that holds up optically at close range. Portrait photographers benefit from the 105mm focal length and f/2.8 aperture, which creates working distance from subjects while keeping backgrounds out of focus. Food and still-life shooters will appreciate the non-rotating filter thread and the focus distance limiter for faster transitions between close and mid-range work. Nikon F mount users with full-frame bodies get full DG-spec coverage across the sensor.

Key Features

• 1:1 magnification at 0.31m minimum focus distance
• 11-element, 10-group optical formula with floating focus mechanism
• f/2.8 maximum aperture with 8-blade diaphragm for portrait-range work
• Micromotor autofocus with 0.4m focus distance limiter to reduce hunting
• Non-rotating 58mm filter thread for consistent orientation-sensitive filters
• 460g, 98mm length - compact and field-ready for macro and telephoto work

FAQ

What magnification does this 105mm achieve at minimum focus?

True 1:1 magnification at 0.31m, meaning a 35mm subject fills the full frame without extension tubes or supplementary lenses.

How does the floating focus mechanism improve macro performance?

It maintains optical correction throughout the focus range, which matters at high magnification where small aberrations become visible in the final image.

Will the focus distance limiter speed up autofocus?

Yes. Setting the limiter to 0.4m and beyond prevents the lens from hunting through the close-focus range, saving time when you're working at portrait or telephoto distances.

Does this lens have image stabilization?

No. The designation OS in the full model name refers to Sigma's stabilization feature available on some versions, but this particular copy does not include it. At 105mm on a Nikon body, you'll want fast shutter speeds or a tripod for macro work.

What's the practical difference between f/2.8 macro lenses and wider portrait primes for background separation?

At medium distances, the 105mm focal length gives you background separation comparable to a 70mm portrait prime at f/2.0. The 8-blade diaphragm keeps bokeh smooth and workable, not circular but usable for portraits.

Why does the non-rotating filter thread matter for macro work?

If you're using a polarizer or graduated ND filter on the front, a non-rotating thread means the filter orientation stays locked as you focus, maintaining consistent polarization or graduated effect throughout the shot.

Is this lens weather-sealed?

No. It's built to EX specification, which denotes higher-grade internal construction, but there's no weather sealing. Keep it dry on location.