Quantaray 500mm f/8 Reflex Lens for Canon FD *USED*

Quick Overview

• Catadioptric mirror-based optical design
• Fixed f/8 aperture, no diaphragm
• 500mm super-telephoto focal length
• Compact, lightweight barrel construction
• Compatible with M42 screw mounts
• Manual focus control only
• Distinctive donut shaped bokeh
• Requires steady tripod for sharpness
• Budget-friendly super-telephoto reach
• Needs bright light for exposures

Product Description

The Quantaray 500mm f/8 Reflex Mirror Lens utilizes a catadioptric optical design, which employs a system of internal mirrors rather than relying solely on glass elements to fold the light path. This specific architecture allows the lens to achieve a long 500mm telephoto focal length while maintaining a significantly shorter and more compact physical barrel than traditional refractive lenses. Because the lens features a fixed aperture set at f/8, it removes the complexity of aperture control, allowing the photographer to focus entirely on shutter speed and ISO adjustments for exposure.

Equipped with a standard M42 screw mount, this lens offers broad compatibility with a wide array of legacy 35mm film cameras and, through the use of inexpensive adapters, can be easily mounted on most modern digital mirrorless systems. The lens operates via manual focus, utilizing a large, smooth focus ring that allows for precise, tactile adjustments. A signature aesthetic characteristic of this reflex design is its distinct "doughnut" or ring-shaped bokeh, which produces a unique, artistic background blur when shooting subjects with bright specular highlights or intricate foliage.

Designed for extreme portability, the lens is exceptionally lightweight, making it a practical option for handheld telephoto photography where traditional large prime lenses would be cumbersome. The lack of a complex mechanical iris means the lens is immune to common issues such as sticky aperture blades, contributing to its long-term mechanical reliability. Additionally, the lens typically incorporates a rear-loading filter system or specific front thread, providing users the flexibility to apply neutral density or specialized filters to manage light entry and image quality in various shooting environments.