Askar FRA500 500/5,6 APO fi 90 mm
zoom_out_map
chevron_left chevron_right

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

The Askar FRA500 500/5.6 APO is an impressively designed astrograph, a notable feature from this series. It boasts a complex optical system composed of two lens groups and a total of five lenses. To combat chromatic aberration effectively, two lenses made from low-dispersion glass have been included. Furthermore, the surfaces of the lens are layered with high-performance multilayer anti-reflective coatings. This helps in ensuring the best contrast, giving way to absolutely stunning astrophotography results. Don't miss the opportunity to discover the wonders of the night sky with the Askar FRA500 500/5.6 APO.
2546.10 $
Tax included

2070 $ net price (non-EU countries)

Anatolii Livashevskyi
Product Manager
Українська / Polski
+48721808900
+48721808900
Telegram +48721808900
[email protected]

Description

Askar FRA is a remarkable series of professional refractors meticulously designed for astrophotography, boasting unrivaled optical and mechanical quality.

One standout member of this series is the Askar FRA500 500/5.6 APO, an exceptional astrograph featuring a sophisticated optical system comprised of two lens groups housing a total of five lenses. To tackle chromatic aberration head-on, the manufacturer incorporated two lenses crafted from low-dispersion glass. Additionally, the lens surfaces are coated with high-performance multilayer anti-reflective coatings, ensuring optimal contrast for breathtaking astrophotography.

Both mechanically and optically, the Askar FRA500 500/5.6 APO has been expertly optimized for seamless compatibility with full-frame cameras and imaging devices, exemplified by its sturdy 3.5-inch rack & pinion focuser with a microfocus mechanism and a large diameter fully illuminated circle.

Key Features of the Askar FRA500 500/5.6 APO Optical Tube:

  • Apochromatic quintuplet design incorporating two ED glass elements
  • 3.5" rack & pinion focuser facilitating precise alignment even with heavy loads
  • Ample 55mm diameter of the fully illuminated circle, ensuring 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 500/5.6 APO optical tube
  • Mounting rings
  • Carrying handle
  • Losmandy mounting foot
  • Conical adapter
  • Documentation

Warranty:

The Askar FRA500 500/5.6 APO comes with a 24-month warranty, ensuring your peace of mind and satisfaction with this extraordinary astrophotography tool.

Data sheet

K98GE8BB4K

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.