Sigma 17-50mm F2.8 EX DC OS HSM

Canon EF

Review

The Sigma 17-50mm F2.8 EX DC OS HSM is a versatile standard zoom lens designed for Canon EF mounts, particularly for APS-C sensor cameras. With its constant maximum aperture of f/2.8 throughout the zoom range, it appeals to both amateur and professional photographers who seek quality performance in a compact package.

Build Quality and Design

The lens features a robust design with a well-constructed barrel, providing a sense of durability that makes it suitable for various shooting conditions. The lens has a matte black finish, which not only looks professional but also helps reduce reflections. Weighing in at just over 500 grams, it remains lightweight enough for prolonged use, making it an excellent choice for event photography or everyday shooting. The large focus and zoom rings are smooth and allow for easy adjustments, although some users may find the zoom ring slightly stiff at first.

Optical Performance

Image quality is one of the standout attributes of the Sigma 17-50mm. It delivers sharp and detailed images across most of the zoom range, particularly around the 35mm mark where it performs exceptionally well. The constant f/2.8 aperture provides excellent low-light performance, allowing for more creative control in varying lighting conditions. However, at the far ends of the zoom range, particularly at 50mm, there may be some noticeable softening in corners, especially when shooting wide open. Chromatic aberration is well controlled, but it might appear in high-contrast situations.

Image Stabilization

Equipped with Optical Stabilization (OS), this lens helps reduce camera shake, a feature that is invaluable when shooting handheld or in low light. The stabilization works quite effectively, allowing you to lower your shutter speed by several stops without losing sharpness. However, while the stabilization is beneficial, it might exhibit slight noise when engaged, which could distract during video shooting.

Autofocus Performance

The Hyper Sonic Motor (HSM) provides fast and quiet autofocus, making it a reliable choice for both photography and videography. The autofocus system performs admirably in bright conditions but might struggle a bit in lower light situations. The ability to override autofocus with manual focus is definitely a plus, and the focus ring is well-sized for fine adjustments.

Pros and Cons

Pros

• Constant f/2.8 aperture for excellent low-light performance
• Good build quality with a professional finish
• Effective image stabilization for handheld shooting
• Sharp images throughout the zoom range (especially at 35mm)
• Fast and quiet autofocus

Cons

• Some softness in the corners at wide open settings, especially at 50mm
• Zoom ring can be a bit stiff at first
• Minor noise from stabilization unit during video recording

Verdict

Overall, the Sigma 17-50mm F2.8 EX DC OS HSM is a highly capable lens for Canon EF mount users, especially those with APS-C cameras. Its combination of optical quality, low-light performance, and versatility makes it an excellent choice for a wide range of photography genres, from portraits to landscapes. While it has its minor quirks, the positives far outweigh the negatives, making it a lens worth considering for your next investment.