Askar 203 mm f/7 Triplet Apo - EDT Design - 3.5 inch RAP focuser

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Askar 203 mm f/7 Triplet Apo - EDT Design - 3.5 inch RAP focuser

The Askar 203APO is one of the largest apochromatic refractors from series production - a powerful refractor for your observatory

  • Aperture 203 mm - focal length 1421 mm - focal ratio f/7
  • Air-spaced triplet APO objective with one ED element
  • Stable 3.5" RAP focuser with speed reduction and 100 mm travel
  • Working distance suitable for photo correctors and 2? accessories for observation
  • Suitable for EAF motorized focus
  • Two finder shoes - 1x for finder - 1x for mini guide scope
Manufacturer : Sharpstar-Askar
SKU : TSO-AS203APO
Price: 9455.00 € incl tax 19% (Germany)
Estimated delivery time : 1-4 days (valid for new orders)
Product description

Askar 203 mm f/7 EDT triplet apochromat with 3.5" RAP focuser

This apo is one of the largest apochromatic refractors on the market and ideal for observatories. Sharpstar also offers uncompromisingly good value for money with this apo. Teleskop-Service tests every APO mechanically and optically before storing it. Only first-class objectives leave our warehouse.

The air-spaced triplet apo objective

The Askar APO series uses special optical designs and multiple elements to correct chromatic aberration, resulting in a higher quality image. ED glass, also known as low dispersion glass, is an optical glass specifically designed to reduce chromatic aberration.

Integrated tube extension for more flexibility

The tube has an integrated extension that can be extended or retracted as required and locked in place with a clamping ring. This allows the AS203APO to be used not only for photography but also for visual observation. The working distance is large enough for the use of a star diagonal mirror and binoviewer.

The 3.5" rack-and-pinion focuser

The Askar Apo is equipped with a stable 3.5-inch rack and pinion focuser with speed reduction, which is compatible with most current focusing motors. The drawtube travel is 100 mm. The entire focuser is CNC-machined and has an anti-reflection coating on the inside. A scale makes it easier to set a specific position. Two finder shoes are included in the scope of delivery.
The large 360° rotator has precise scales for easy adjustment and a large locking screw that is easy to tighten even under heavy loads. Adapters for 2" and 1.25" accessories complete the equipment.
The tube is CNC-machined and finished with a durable paint or anodized.

Lieferumfang:

  • 203APO OTA
  • Tube rings (3 pieces)
  • Handle
  • 500 mm Losmandy style dovetail bar
  • Case
Products specifications
Technical Data
Objective:Air-spaced triplet apochromat (including one ED glass)
Aperture:203 mm
Focal length:1421 mm
Focal ratio:f/7
Diameter of dewshield:229 mm
Total length:1141 mm with dew shield retracted
Length of the extendable tube extension:150 mm
Thread on the focuser:M84 female thread
Adapter:2"/1.25"
Mount connection:Three tube rings and a 500 mm long Losmandy style dovetail bar
Tube weight:23.5 kg including rings and adapter plate