For traditional astrophotography, it is difficult to achieve a focal length of less than 200MM with commercially available telescopes. The only choice in this range is the ordinary camera lens. However,  camera lenses use a large number of lenses and therefore are NOT optimized for astrophotography, so the result is not satisfactory. 

The FMA180 is the latest development from ASKAR and if you wanted to capture deep-sky objects, it will offer you superior optical performance in comparison to telephoto prime lenses.

In addition to photography and observation, FMA180 can also serve you as a high-performance finder/guider of your choice. The overall tube length is 145mm, the small size of FMA180 tips the scales at a mere 395g.