3M-5A-MC 500mm f/8
3M-5A-MC 500mm f/8 is a manual focus super telephoto lens for full frame cameras.
Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open.
Weights 1225 grams so it is a heavy lens, consider using its own lens bag. 77 mm lens filter diameter, commonly filter size, you have plenty of possibilities this lens deserves a good quality filter. 152 mm long, with this size carry only if you use it.