Askar FMA180 Pro Sextuplet Astrograph
Askar
Askar FMA 180 Pro 40mm f/4.5 Sextuplet APO Lens / Astrograph is an optical tube for general deep-sky imaging and visual observing.
Best Current Offer
Specifications
Optics
- Optical design
- APO refractor
- Aperture
- 40 mm
- Focal length
- 180 mm with reducer; 220 mm native objective
- Focal ratio
- f/4.5 with reducer; f/5.5 native
- Dawes limit
- 2.9"
Astrophotography Fit
Best for general deep-sky imaging and visual observing when the mount, camera format, and correction hardware are chosen as one system.
Askar FMA 180 Pro 40mm f/4.5 Sextuplet APO Lens / Astrograph sits in the telescope slot for general deep-sky imaging and visual observing. The important buying question is whether the optical design, focal length, and mount demands match the targets you actually shoot.
Fast astrographs collect signal quickly, but they are unforgiving: collimation, tilt, filter behavior, and back-focus spacing show up immediately in star shapes.
Best paired with
- Rigid focuser, tilt adjuster, and exact corrector spacing
- Cooled cameras with a sensor inside the corrected image circle
- High-throughput filters that behave well at fast focal ratios
Not recommended for
- Users who do not want to tune collimation, tilt, and spacing
- Thick or narrow filters that show strong bandpass shift at fast focal ratios
- Loose camera adapters or focusers that cannot hold the imaging train square
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| High Point Scientific High Point Scientific | $439.00 | In stock Updated 8/5/2026 | View Offer - $439.00 |
| Starizona Starizona | $439.00 | In stock Updated 8/5/2026 | View Offer - $439.00 |
| Telescopes.net Telescopes.net | Not tracked yet | Unknown Updated 8/5/2026 | View Offer |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.