Sigma 105mm f/2.8 Macro EX DG HSM OS (1:1) Lens for Canon EF-Mount {62}

Sigma's proven 105mm f/2.8 macro with optical stabilization

At 105mm and 1:1 magnification, this lens sits in a focal length that works equally well for close-up work and portrait shooting. The minimum focus distance of 12.28 inches gets you genuinely close to your subject, while 105mm keeps enough working distance between you and a live insect or skittish reptile that you're not casting a shadow over it. The floating focus mechanism maintains optical correction across the entire focus range, which matters when you're shooting at reproduction ratios where field curvature becomes a real problem.

The Hypersonic Motor autofocus is quiet and allows full-time manual override without switching modes, useful when you've nearly nailed focus with AF and want to nudge it the last fraction. Optical image stabilization adds real value here, since macro shooting at 1:1 boosts camera shake by the same ratio as magnification. The 9-blade rounded diaphragm produces smooth out-of-focus rendering at f/2.8, and the 62mm filter thread doesn't rotate during focusing, so polarizers and graduated NDs stay put. Weather and dust sealing on the EX-grade barrel rounds out a build quality that holds up to field use.

For Canon EF shooters who want a single lens that handles both product and portrait work without switching glass, the 105mm focal length and f/2.8 maximum aperture cover both tasks at a price point that reflects 14 years in the market.

Who It's For

Macro and nature photographers benefit from the 1:1 magnification and 12.28-inch minimum focus distance paired with OS stabilization, since handheld close-up work demands both reach and shake control. Portrait shooters get a flattering focal length and f/2.8 for subject separation without resorting to a dedicated portrait prime. Product and still-life photographers working in controlled conditions will appreciate the floating focus mechanism's optical consistency at high magnification. The weather sealing also makes this a practical choice for outdoor field work where dust and moisture are a given.

Key Features

• 105mm focal length with 1:1 macro magnification ratio
• f/2.8 maximum aperture with 9-blade rounded diaphragm
• Optical image stabilization for macro handheld work
• HSM ultrasonic autofocus with full-time manual override
• Floating focus mechanism maintains optical correction throughout range
• Weather and dust-sealed EX-grade barrel construction
• Non-rotating 62mm filter thread preserves polarizer orientation
• 12.28 inch minimum focus distance with focus distance limiter

FAQ

What's the working distance at 1:1 magnification?

At minimum focus (12.28 inches), you get roughly 2.5 inches of physical space between the front lens element and your subject. The 105mm focal length lets you shoot from farther back than a 50mm or 60mm macro, which prevents your shadow from killing the light on small subjects like insects.

Does the autofocus work well for macro, or should I rely on manual focus?

The HSM motor is fast enough for macro work, and full-time manual override lets you fine-tune after AF locks. At 1:1, the depth of field is thin enough that you'll often want to make small adjustments by hand anyway. The focus distance limiter at 0.45m speeds up AF by restricting the search range to close-focus distance.

How much does optical stabilization actually help at 1:1 magnification?

At 1:1, camera shake is magnified directly into the frame, so OS becomes genuinely useful rather than a convenience feature. You'll notice cleaner handheld shots, especially in lower light where shutter speeds drop. Tripod work still benefits because OS can help settle micro-vibrations from mirror slap and shutter shock.

Will a circular polarizer stay in the same position while focusing?

Yes. The filter thread doesn't rotate during autofocus or manual focus, so polarizers and graduated ND filters maintain their orientation throughout the shot. That's a real difference from lenses where the front element spins as it focuses.

What's the difference between this and Sigma's macro lenses at other focal lengths?

The 105mm gives you more working distance than a 50mm or 60mm macro, making it better for live subjects and environmental portraits. A 180mm macro trades the shorter working distance and portrait versatility for even more magnification range, but it's bulkier and slower to autofocus. The 105mm sits in the practical middle.

Is this lens weather-sealed for field macro work?

Yes. It has weather and dust sealing on the barrel, so light rain or dusty conditions won't compromise it. That said, the Canon EF mount itself isn't sealed, so you're only protected at the lens level-standard practice for third-party macro lenses.

How does the floating focus mechanism affect image quality across the focus range?

Floating focus maintains optical correction for field curvature and aberrations throughout the focus range, which matters because macro shooting magnifies any optical imperfection. You won't see focus-breathing shift the angle of view noticeably when you transition from AF to manual or adjust focus distance.