Meniscus Cylindrical Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus Lens is used to increase the focal length of another ...
Meniscus Cylindrical Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus Lens is used to increase the focal length of another ...
The Sky-Watcher USA 190mm Maksutov-Newtonian telescope is a 7 1/2-inch (190mm aperture) f/5.3 instrument utilizing a meniscus lens and spherical primary mirror, both made of low-expansion borosilicate ...
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