APM Telescopes recently completed initial work on the optical set of what might be the largest true Maksutov-Cassegrain telescope ever attempted, a 20-inch f/8 monster of a Mak-Cass! The mirrors are made from Astro-Sital, and the optical elements are now undergoing broadband multicoating. Optics are by Sankovitsch, in Russia, while […]
By Mark Zaslove Mark Zaslove is a two-time Emmy Award winner and recipient of the coveted Humanitas Prize. Mark is a born-again astro noobie, who once had an Optical Craftsman scope as a kid, and is now recapturing his youthful enthusiasm (with a digital twist) and having a lovely time […]
APM’s new 2-inch Ceramic Safety Herschel Prism operates on the principle that only a small portion – approximately five percent – of the incident light is used for the actual observation. Herschel Prisms of the classic design guide the unused and incomparably larger, more energetic portion of light through the […]