The 200-500mm f/5-6.3 SP AF Di LD (IF) Lens for Canon EOS from Tamron is an ultra telephoto zoom lens designed to bring distant subjects close. Its minimum focus distance is 8.2' (2.5 m) and its maximum magnification ratio is 1:5 at 500mm. For a lens that covers such long focal lengths, it is relatively compact and lightweight. An internal focus system maintains its compact form as the lens does not extend when focusing. Its optical design consists of two Low Dispersion glass elements which minimize chromatic aberrations and provide sharp, high resolution, high contrast images. The lens is designated "Di" which stands for Digitally Integrated Design and meets the performance characteristics of digital and film SLR cameras. When mounted on a DSLR camera with an APS-C size sensor, it provides a focal length equivalent of 310-775mm.

This lens features a detachable Filter Effect Control Ring. This allows a filter to be rotated to the desired position with the hood still attached, enabling you to easily perform minute adjustments to a polarizer filter. The lens also includes a dedicated lens hood to block stray light from entering the lens and causing flare and a detachable rotating tripod collar and mount to provide stability when shooting at long focal lengths.

Low Dispersion Glass
Two LD glass elements reduce chromatic aberrations while minimizing the fall-off of light at the corners.
Internal Focus
The lens neither extends nor contracts physically when focusing; all moving elements are contained within the lens barrel.
Di Design
Digitally Integrated design lenses are designed to meet the performance characteristics of digital SLR cameras while still functioning on film SLRs.
Detachable Filter Effect Control Ring
This allows a filter to be rotated to the desired position with the hood still attached, enabling you to easily perform minute adjustments to a polarizer filter.
Detachable Tripod Collar
The easily detachable, rotating tripod mount is made of lightweight and strong magnesium alloy.