The Samyang 500mm f8 DX is a compact reflex mirror lens for Full Frame or APS-C size sensor cameras, with a universal T-Mount. This type of lens construction creates a high magnification lens with a short overall length and the lens weighs only 330g, so it’s feasible to use it hand-held in combination with a high shutter speed, although for best results use with a tripod. The T-mount must be purchased separately and simply screws on the rear of the lens, so if you change camera it’s easy to convert the lens for a modest price. Carrying bag included.