Sigma AF Telephoto 400mm 5.6 Lens for Nikon AF (Pre-Owned)

The Sigma AF Telephoto 400mm f/5.6 lens for Nikon AF is a telephoto prime lens designed for Nikon F-mount cameras. Here's an overview of its features:

1. Focal Length: The lens has a fixed focal length of 400mm, making it a powerful telephoto lens suitable for capturing distant subjects such as wildlife, sports, and astrophotography.

2. Aperture: With a maximum aperture of f/5.6, this lens allows for decent low-light performance and shallow depth of field when shooting wide open. While not as fast as some prime telephoto lenses, it still provides good image quality and versatility.

3. Autofocus: The lens features autofocus functionality, allowing for quick and accurate focusing on subjects. It utilizes Sigma's AF (Autofocus) system for efficient focusing performance.

4. Optical Construction: The lens likely consists of multiple lens elements arranged in groups to correct for various aberrations and deliver sharp images with good contrast and color rendition.

5. Compatibility: The lens is designed for Nikon F-mount cameras, including both DSLRs and some film SLRs. It may also be compatible with Nikon's mirrorless cameras via an adapter, although autofocus performance may vary.

6. Build Quality: Sigma lenses are typically well-built with durable materials, providing reliability and longevity even under demanding shooting conditions. The lens may feature weather-sealing to protect against dust and moisture.

7. Manual Focus Override: Some Sigma lenses offer manual focus override, allowing photographers to fine-tune focus manually even when autofocus is engaged. This feature enhances flexibility and control over the focusing process.

8. Tripod Collar: Given the long focal length, the lens may include a tripod collar to provide better balance and stability when mounted on a tripod.

9. Size and Weight: Telephoto lenses, especially those with longer focal lengths like 400mm, tend to be large and heavy. This lens may require additional support, such as a sturdy tripod or monopod, for comfortable and stable shooting.