Sigma 20mm F1.8 EX DG Aspherical RF

Nikon F (DX/FX)

Review

The Sigma 20mm F1.8 EX DG Aspherical RF for Nikon F (DX) is a vibrant and versatile ultra-wide-angle lens that stands out for its impressive low-light capabilities and sharp image quality. With a wide maximum aperture of F1.8, this lens provides exceptional performance for astrophotography, landscape photography, and environmental portraits, making it an appealing choice for both amateur and professional photographers.

One of the key strengths of this lens is its ability to produce stunningly sharp images even at larger apertures. The aspherical elements help to reduce spherical aberration, while the multi-layer coating minimizes ghosting and flares, resulting in images with excellent contrast and clarity. Whether you're shooting landscapes at dawn or capturing fleeting moments indoors, the lens performs admirably in various lighting conditions.

Additionally, the build quality of the Sigma 20mm is impressive, featuring a robust and durable construction that ensures longevity. The lens includes a focus distance scale, which is a valuable asset for hyperfocal focusing and can be quite handy for landscape photographers aiming for maximum depth of field. Furthermore, its relatively lightweight design makes it convenient for on-the-go shooting.

However, the Sigma 20mm F1.8 does have some drawbacks worth mentioning. Due to its wide-angle nature, users might observe some distortion, particularly in the corners of images. While the barrel distortion is manageable in post-processing, it’s something to consider if your work prioritizes straight lines and architectural subjects. Additionally, the autofocus system, while adequate, can be slower compared to modern Nikkor lenses, especially in low-light situations.

Pros and Cons

Pros

• Wide maximum aperture (F1.8) for excellent low-light performance
• Superb sharpness and contrast, even at wider apertures
• Durable build quality and lightweight design
• Focus distance scale for precise focusing

Cons

• Noticeable distortion, particularly in the corners
• Autofocus can be slower compared to newer lenses

Verdict

In conclusion, the Sigma 20mm F1.8 EX DG Aspherical RF for Nikon F (DX) is a fantastic lens that excels in low light while offering excellent image quality, making it a solid option for a range of shooting scenarios. Its robust construction and user-friendly features enhance its appeal, though some distortion and a slightly slower autofocus system may be drawbacks for specific users. Overall, it is a worthy addition to any photographer's kit, particularly for those who appreciate the creative possibilities of ultra-wide-angle photography.