Sigma's New 10-18mm Lens: Ultra-Wide, Fast & Featherlight

The Sigma 10-18mm f/2.8 DC DN Contemporary lens has emerged as a game-changer for APS-C mirrorless camera users, offering an ultra-wide-angle zoom with a constant f/2.8 aperture in a remarkably compact form. Designed for Sony E-mount, Fujifilm X-Mount, and L-Mount cameras, this lens is a versatile tool for photographers and videographers seeking quality without the bulk.

Compact Design Meets High Performance

Despite its small stature, the Sigma 10-18mm f/2.8 lens does not compromise on performance. Measuring a mere 2.4 by 2.8 inches and weighing just 9.2 ounces, it is one of the most portable lenses in its category. The inclusion of a 67mm front filter thread and a new push-on petal lens hood design further enhance its user-friendliness. While the lens features a rubber grommet at the mount for basic dust and splash resistance, it's worth noting that it is not fully weather-sealed.

Optical Excellence

The Sigma 10-18mm f/2.8 lens boasts an optical construction of 13 elements in 10 groups, including specialized elements to combat aberrations. Its performance is impressive, delivering sharp images across the zoom range. At the widest aperture of f/2.8, the lens provides excellent center sharpness, with corner sharpness improving significantly when stopped down to f/5.6 to f/8. Distortion is well-controlled, and any chromatic aberration is effectively corrected in-camera or through post-processing software.

Autofocus and Stabilization

Equipped with a stepping motor, the autofocus system of the Sigma 10-18mm f/2.8 is both quick and quiet, making it suitable for capturing stills and video. Although lacking in-lens stabilization, the lens performs admirably when paired with cameras featuring in-body image stabilization (IBIS) or when used with a gimbal for video work.

Bokeh and Close-Up Potential

The lens's 7-blade rounded diaphragm contributes to pleasing bokeh when shooting at wider apertures and close distances. Additionally, the lens's close focusing capabilities allow for creative close-up shots with a maximum magnification ratio of 0.25x at the 10mm focal length, providing versatility beyond traditional wide-angle uses.

Comparative Advantage

When compared to alternatives like the Tamron 11-20mm f/2.8 Di III-A RXD, the Sigma lens stands out for its slightly wider angle of view and more compact design. It is also more affordable, making it an excellent value proposition. First-party options such as the Sony E PZ 10-20mm F4 G and the Fujifilm XF 10-24mm F4 R OIS WR offer different features, such as power zoom or optical stabilization, but at a higher cost and larger size.

Conclusion

The Sigma 10-18mm f/2.8 DC DN Contemporary lens is a compelling choice for APS-C mirrorless camera users seeking a wide-angle zoom with a fast aperture. Its combination of image quality, compact size, and affordability make it a standout option in its category. For those looking to expand their creative possibilities without breaking the bank, the Sigma 10-18mm f/2.8 is a lens worth considering. For a more in-depth look at this lens, check out reviews from TechRadar and PCMag.