80PHQ inherits the optical design of the PHQ family, adopting a 3+1 quadruplet lens structure which contains two pieces of ED glass that can effectively reduce chromatic aberration and enhance clarity and sharpness. It’s worth mentioning that all astrographs from the PHQ family come with an integrated lens combination rather than simply placing three major lenses and a corrector together in a line. In other words, the whole optical system cannot solely perform without any piece of these lenses. This structure design leads to a more rational lens arrangement, better vignette control and superior image quality. The focal ratio of 80PHQ is f/7.5. It’s a “long” focal-ratio astrograph compared with other counterparts from Askar. It’s a little bit longer even compared with 107PHQ which is f/7 in focal ratio.
150mm Newtonian astrograph with super-fast f/2.8 optics and 55mm backfocus
Fully and rigorously tested on site for cosmetics, mechanical operation, and optical performance by a master optician to ensure excellent overall telescope operation and customer satisfaction (an Agena exclusive service)
Hyperbolic primary and 3-element corrector lens deliver sharp flat images over a large 44mm image circle
18” long carbon fiber tube and CNC machined aluminum fittings make for a durable yet lightweight instrument
2.5” rack and pinion focuser handles heavy loads without slipping; includes 1.25" holder for smaller cameras or eyepieces
Includes carrying handle, Losmandy dovetail plate, and hard carrying case