The Astro-Tech High Grade Plössl eyepieces are surprisingly high quality performers considering their economical prices. Their 55° field of view is wider than other Plössls in this focal length range for more expansive views. In addition, similar competitive eyepieces are typically 25% to 33% more costly than these Astro-Techs, in line with the Astro-Tech philosophy of “more performance for less money.”
Each Astro-Tech Plössl is fully multicoated with 40-layer high transmission/anti-reflection optical coatings for maximum light transmission and contrast. Their classic four element/two group Plössl optical design uses high grade glass with blackened lens edges and advanced internal baffling. What does this mean to you, the observer? Sterling optical performance, with virtually zero ghosting or internal reflections, for sharply defined lunar/planetary details and cleanly split binary stars.
As with all Astro-Tech products, their build quality is second to none. Each eyepiece is housed in a precision CNC machined matte black body with a high gloss black anodized barrel. Their large and easy to read focal length labeling is laser engraved into the barrels so it won’t wear off with use as the ordinary silk-screened labeling on lesser eyepieces often does. The barrels are threaded to accept standard 1.25" eyepiece filters.
There is a slight taper machined into each eyepiece barrel to act as a safety stop. This gently engages your focuser or star diagonal thumbscrew and helps keep the eyepiece from falling should the thumbscrew accidentally loosen during use. Plastic caps are supplied to keep both ends of the eyepieces dust free.