Sigma 50-200mm F4-5.6 DC OS HSM

Nikon F (DX/FX)

Review

The Sigma 50-200mm F4-5.6 DC OS HSM is a telephoto zoom lens that caters to Nikon F (DX) mount users. It's an interesting option for photographers seeking versatility without the bulk typically associated with longer zoom lenses. Designed for APS-C format cameras, this lens provides a focal length equivalent to 75-300mm, making it suitable for everything from portraiture to wildlife photography.

Build Quality and Design

The lens sports a solid construction with a primarily plastic body, which helps in keeping the weight manageable for extended shooting sessions. Although it’s not weather-sealed, its relatively compact design makes it easily portable. The lens features a smooth zoom mechanism, and the rubberized focus and zoom rings are well-placed for comfortable operation. However, some photographers may find that the build quality feels less premium compared to more expensive counterparts.

Optical Performance

In terms of optical quality, the 50-200mm delivers sharp images throughout much of its zoom range, particularly at the centre of the frame. Chromatic aberration is well-controlled, especially when stopping down the aperture. Images maintain good color fidelity and contrast, although there can be some softness at the extreme edges when shot wide open, especially at longer focal lengths. The lens also features Sigma's Optical Stabilization (OS), which is particularly beneficial for handheld shooting at slow shutter speeds, making it an asset for low-light situations.

Autofocus System

The HSM (Hyper Sonic Motor) autofocus is another highlight, providing fast and quiet autofocus performance. It’s generally reliable and performs well in various lighting conditions, but it can occasionally struggle with tracking fast-moving subjects. Manual focus override is possible, which is a plus when you need that extra precision.

Versatility

Due to its focal length range and relatively lightweight design, this lens is a suitable choice for various photographic styles including portraits, landscapes, and even some sports or wildlife shooting. However, the variable aperture (F4-5.6) may limit its usability in very low light conditions compared to faster prime lenses.

Pros and Cons

Pros

• Compact and lightweight build for ease of transportation.
• Good sharpness and optical quality at most focal lengths.
• Effective Optical Stabilization for low-light or slow-shutter shooting.
• Fast and quiet autofocus system.

Cons

• Build quality may feel less premium compared to higher-end lenses.
• Some softness at the edges when shooting wide open.
• Variable aperture limits low-light performance.

Verdict

The Sigma 50-200mm F4-5.6 DC OS HSM lens represents a solid choice for Nikon F (DX) users who require a hybrid lens for various photography situations. While it has its limitations, particularly concerning edge sharpness and build quality, its optical performance, effective stabilization, and versatility make it a worthwhile addition for photographers looking to enhance their lens kit without overwhelming bulk or expense.