A versatile lens for photographing distant subjects, the 420-800mm f/8.3 Super HD Telephoto Zoom from Ultimaxx features a convenient threaded T-mount for adapting to a wide variety of camera types. Its 4 elements, 2 groups optical design features a super HD multi-coating. A lens hood is built into the design, to suppress lens flare, ghosting, & surface reflections for increased contrast & color neutrality when shooting in strong lighting conditions. Integrated rotating tripod mount enables sturdy mounting of the lens to a tripod or monopod.

Extending the reach of T-mount lenses, this 2x Teleconverter from Ultimaxx increases a lenss magnification by 2x for a narrower field of view. In effectively doubling the focal length of the attached lens.

This Ultimaxx T-Mount Adapter for Canon EF allows you to mount T-mount lenses, telescopes, microscopes, or other optics to your Canon EF-mount camera body. When in use, automatic camera functions, such as autofocus and exposure control, will not be available and must be set manually.