The TTArtisan 250mm f/5.6 Reflex Lens (M42 Mount) is a compact and powerful telephoto lens designed for photographers who want a lightweight solution for wildlife, sports, and other long-distance photography. With its 250mm focal length (approximately 375mm equivalent on full-frame), this lens allows you to capture distant subjects with impressive detail and clarity.

Featuring a f/5.6 aperture, the lens strikes a balance between sharpness and the ability to control depth of field, while its mirror lens design offers a more compact and lightweight alternative to traditional telephoto lenses. The catadioptric construction reduces the lens's size and weight, making it ideal for photographers who want a more portable telephoto solution without sacrificing image quality.

The manual focus mechanism provides precise control, allowing you to focus on distant subjects with fine detail. This lens is ideal for birding, sports photography, and landscape shots where you need extra reach.

The M42 screw mount ensures broad compatibility with a wide range of film and digital cameras. For digital camera systems that don’t have native M42 support, the lens can be used with the appropriate M42-to-Canon, M42-to-Nikon, or other mount adapters.

If you're looking for a compact telephoto lens with excellent reach, sharp focus, and a unique mirror design, the TTArtisan 250mm f/5.6 Reflex Lens is an excellent choice for serious photographers.