The Samyang 300mm f6.3 for Nikon DSLR is a compact manual focus reflex mirror lens available in versions for both compact mirrorless and DSLR cameras. Weighing just 315g and with a short overall length and diameter, the lens is hardly bigger than many short telephotos, yet provides large image magnification. It takes 58mm filters at the front and 25.5mm at the rear. As with all mirror type lenses it has a fixed f6.3 aperture and gives typical ‘doughnut’ out of focus highlights. If used handheld, a high shutter speed is recommended to avoid camera shake and to obtain best results.