Askar 400 F5.6 scope (FRA400)
The FRA, which stands for "FLATFIELD REFRACTIVE ASTRAGRAPH", is a refractive astrograph designed for built-in flat field correction. FRA also used in visual observation, this series creates versatile high-quality flat frame images for astrophotography, Telescopeis the few great telescope of versatile optical tube. A supplier toTeleskop-Servicein Europe, this telescope is manufactured by SharpStar and now available in Canada.
In accordance with the easy conversion of lens parameters, our first FRA series product is the f/5.6 quintuplet astrograph with 400mm focal length and 72mm aperture. Two ED (Extra-low Dispersion) glass elements are also included to effectively suppress chromatic aberration. FRA400 features a 44mm full frame image circle.
Adopts modern telescope optical tube design, features retractable dew shield, 3" large high-precision rack-and-pinion focuser with 360°rotator, features M68 X 1 thread, 2" adapter ring and 1.25"eyepiece adapter. The focuser also features high precision micro-adjustment for observation and photography.
F3.9 Full Frame Reducer for FRA400/5.6
What's in the Box
- Optical Tube
- A pair of rings
- A handle
- A dovetail plate
- An inspection list
- A Manual
|Objective Type||Quintuplet dual ED air-spaced APO|
|Back Focus||140mm (from the end of rotator M68x1 thread)|
|Back-End Adapter||M68x1 male thread, 2" adapter/1.25" adapter|