Our company is involved in preparing official permits from the Polish Ministry of Development and Technology, which allows us to export all dual-use drones, optics, and portable radiophones without VAT on the Polish side / and without VAT on the Ukrainian side.
Askar FRA500 500/5,6 APO fi 90 mm
2951 $ net price (non-EU countries)
Anatolii Livashevskyi
Product Manager
/ 
+48721808900
+48721808900
+48721808900
[email protected]
Description
Askar FRA500 500mm f/5.6 APO Professional Refractor Astrograph
The Askar FRA series represents a pinnacle in professional refracting telescopes, meticulously crafted for astrophotography enthusiasts and professionals alike. Each model in this series is engineered to deliver outstanding optical and mechanical performance.
One of the standout models is the Askar FRA500 500mm f/5.6 APO, a high-performance astrograph designed with a sophisticated optical system. It features two lens groups comprising a total of five lenses, including two made from low-dispersion glass to effectively eliminate chromatic aberrations. The lens surfaces are treated with advanced multilayer anti-reflective coatings, ensuring exceptional contrast and clarity for stunning astronomical imagery.
The Askar FRA500 500mm f/5.6 APO is optimized both mechanically and optically for seamless use with full-frame cameras and imaging devices. It is equipped with a robust 3.5-inch rack & pinion focuser, complete with a microfocus mechanism and a generously sized fully illuminated circle.
Key Features:
- Apochromatic quintuplet design with two ED glass elements for superior image quality
- 3.5" rack & pinion focuser enabling precise alignment, even with heavy camera setups
- Generous 55mm diameter fully illuminated circle for full-frame sensor coverage
Technical Specifications:
- Optical system: ED-APO apochromatic quintuplet with air gap
- Number of ED glass elements: 2
- Objective diameter: 90mm
- Lens focal length: 500mm
- Aperture ratio: f/5.6
- Anti-reflective coating: Full multi-layer coating (FMC)
- Diameter of fully illuminated circle: 55mm
- Back focus: 158mm from the M48x0.75 thread on the conical adapter end / 86mm from the M86x1 thread on the focuser rotator
- Focuser diameter: 3.5"
- Focuser type: Rack & pinion with 10:1 microfocus and 360° rotation capability
- Camera or imaging device connection threads: M86x1 / M48x0.75
- Mounting foot: Losmandy
- Tube length (with extended dew shield): 452mm
- Tube length (with retracted dew shield): 410mm
- Stem/tube diameter: 120/105mm
- Tube weight: 4.1kg
Included Components:
- Askar FRA500 500mm f/5.6 APO optical tube
- Mounting rings
- Carrying handle
- Losmandy mounting foot
- Conical adapter
- Documentation
Warranty:
The Askar FRA500 500mm f/5.6 APO is backed by a 24-month warranty, ensuring peace of mind and satisfaction with your astrophotography investment.
Data sheet
Official permits of the Ministry of Development and Technology
Our company is involved in preparing official permits from the Polish Ministry of Development and Technology, which allows us to export all dual-use drones, optics, and portable radiophones without VAT on the Polish side / and without VAT on the Ukrainian side.