The 500mm f/6.3 LD UNC AL Lens from Oshiro is a classic all-metal refractor-style super telephoto T-mount lens, with an aperture diaphragm in the middle of the lens body to stop down the aperture when necessary. However, it is assumed that much of the shooting with such a lens will be at its maximum f/6.3 aperture, with a tripod, monopod, or other such support. It maximum aperture of f/6.3 provides substantial light gathering for edge to edge sharpness and lovely high resolution photography.

When combined with the included T-mount to fit your camera, this super telephoto works on both "full frame" cameras as well as the "APS-C" style digital SLR cameras. You can use the lens in "M" manual exposure mode or "A" aperture-priority mode only. This lens' sophisticated achromatic refractor design yields images with pleasing peak contrast and well controlled flare. It can be used at maximum aperture on a very bright day for some images of moving subjects.

One extra-low dispersion (LD) element is incorporated within the design that helps to greatly reduce chromatic aberrations for increased clarity, sharpness and color accuracy when photographing in strong lighting conditions. Ultra nano multi-coating eliminates lens element reflections and reduces ghost and flare. Its enhanced optical design consists of 4 lens elements in 4 groups with minimal glass-to-air surfaces. The physical design also incorporates a tripod mount and removable lens hood that helps to minimize lens flare and ghosting.

• 500mm f/6.3 achromatic refractor telephoto lens
• Extra-low dispersion element is incorporated within the 4 element, 4 group design, and helps to reduce chromatic aberrations for sharper image quality
• Manual focus design is complemented by both depth of field and distance scales for utilizing pre-focusing techniques
• Built-in tripod mount and removable lens hood helps reduce stray light to prevent lens flare and ghosting
• All-metal body and mount

Specifications
- Focal Length: 500mm
- Max Aperture: f/6.3
- Min Aperture: f/32
- Angle of View: 5 degrees
- Format: Full Frame and APS-C
- Structure: 4 elements in 4 groups
- Aperture Blades: 8
- Focusing Distance: 9.8' (3m)
- Focus: Manual
- Filter: 72mm
- Dimensions: 4.5 x 17 in (114mm x 432mm)
- Weight: 1565g (55oz)

An accessory ring which converts the lens mount of your SLR camera to a T-Mount. The compatible T-Mount System makes it possible to use most any single lens reflex camera in combination with various front camera attachments such as telescopes, mirror lenses, slide duplicators...etc. The T-Mount is a metal connector that screws onto the compatible front attachment and allows this combination to be coupled to your SLR camera lens mount.

• High Quality Metal Construction
• Attach your camera to the t-mount and you are ready to begin taking pictures!
• 1 Year Warranty

 Compatible with all Canon EOS EF Mount Cameras