Sigma 100-400mm F5-6.3 DG OS HSM

Nikon F (DX/FX)

Review

The Sigma 100-400mm F5-6.3 DG OS HSM is a versatile telephoto zoom lens designed for Nikon F mounts, particularly attractive for DX-format DSLRs. This lens expands your photographic possibilities without the burden of excessively heavy gear, making it an appealing choice for wildlife, sports, and even landscape photography.

Build and Design

The lens has a robust feel, constructed with a combination of high-quality plastic and metal components. Weighing in at around 1,160g (approximately 2.57 lbs), it strikes a balance between durability and portability. The inclusion of weather-sealing allows for some protection against dust and moisture, which is a significant plus for photographers who often shoot in challenging conditions. The rubberized zoom and focus rings provide a good grip, enhancing usability when adjusting settings on the go.

Optical Performance

With a focal length range of 100-400mm, this lens is ideal for capturing distant subjects. The optical performance is commendable, exhibiting sharpness across the zoom range. However, there is a slight drop in performance at the extreme ends of the zoom, particularly at f/6.3. The lens has a Super Multi-Layer Coating that helps reduce flare and ghosting, contributing to contrast and clarity in images. The bokeh is pleasing thanks to the 9-blade diaphragm, although you might notice some variation in the quality of out-of-focus highlights.

Autofocus and Stabilization

The autofocus is generally quick and reliable, though it may struggle in low light or with fast-moving subjects. For action photography, this could be a limiting factor, especially at longer focal lengths. The built-in Optical Stabilization (OS) is effective, providing up to four stops of compensation, which is a crucial feature for handheld shooting at longer distances. It is not flawless, and very fast movements may still result in a bit of blur due to the lens's inherent limitations.

Compatibility and Use Cases

Designed primarily for Nikon F (DX) mount, this lens pairs beautifully with cameras like the Nikon D7500 or D5600. It allows for a 150-600mm equivalent field of view on DX bodies, amplifying its reach. This makes it ideal for those wanting to capture wildlife, sports, or even day-to-day moments from a distance without the need for a heavier lens.

Pros and Cons

Pros

• Good build quality with weather-sealing.
• Excellent optical performance for the price.
• Effective Optical Stabilization (OS).
• Versatile focal length range suitable for various subjects.

Cons

• Autofocus performance can falter in low light and with fast-moving subjects.
• Slight decrease in sharpness at the extremes of the zoom range.
• Weighs more than some competitors, which may affect portability for extended shoots.

Verdict

The Sigma 100-400mm F5-6.3 DG OS HSM lens is a solid and versatile choice for Nikon F (DX) users looking to extend their reach without excessive weight. While it has some drawbacks, particularly concerning autofocus consistency in challenging lighting conditions, the overall performance and quality make it a worthy addition to any photographer's kit. Whether capturing dynamic wildlife scenes or distant landscapes, this lens can deliver excellent results at an attractive price point.