The MTO-1000A is a massive catodioptric lens manufactured by LZOS in Lutkarenko. It has a focal length of 1100 mm (actual focal length:1084 mm), and a maximum aperture of f/10.5. It is 278 mm long, has a diameter of 138 mm and weighs 3.6 kgs. Supplied with either a 39 mm or 42 mm screw lens mount, it comes in a rigid fitted case containing the lens, lens caps and three filters. It has a built-in lens hood.

David Tomlinson.