MTO 11 1000mm f/10 is a reflex telephoto lens of the Professor D. D. Maksutov system with a long focal length and multi-layer achromatic coating.
The "SA" variant was distinguished by reduced dimensions and weight.
Equipped with a recessed light-protective hood.
Additional Information:
Field of view angle - 2.5°.
Resolution: 35 lines/mm in the center of the field, 28 lines/mm at the edges.
Transmittance - 0.7.
Light scattering coefficient - 0.03
Filter 120 mm