Askar 151PHQ Quadruplet Astrograph
Askar
Askar 151PHQ 151mm f/7 Quadruplet Flat-Field Refractor is an optical tube for general deep-sky imaging and visual observing.
Best Current Offer
Specifications
Optics
- Optical design
- Quadruplet flat-field astrograph
- Aperture
- 151 mm
- Focal length
- 1057 mm
- Focal ratio
- f/7
- Dawes limit
- 0.77"
- Lens design
- Quadruplet air-spaced APO (including two ED glass)
- Back focus
- 55 mm
Specifications
- Image circle
- 60 mm
Mechanical
- Focuser
- fully retreated): Imaging mode: 78 mm (from the base of M48x0.75 male thread) Observing mode: 119 mm (from the end of1.25" eyepiece holder)
- Weight
- 24 lb (11 kg) Total Weight (including tube ring & dovetail plate): 28 lb (13 kg)
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 151PHQ 151mm f/7 Quadruplet Flat-Field Refractor 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.
Refractors keep the field routine calmer: no regular collimation, predictable cooldown, and a clean path to autofocus and filtered imaging. The tradeoff is aperture and reach.
Best paired with
- Corrected field flattener or reducer when the design requires one
- Cooled APS-C or smaller astro cameras matched to the image circle
- Autofocus, guide scope or OAG, and a mount with comfortable payload margin
Not recommended for
- Large full-frame sensors unless the corrected field supports them
- Very small travel mounts near their realistic imaging payload limit
- Buyers expecting one telescope to be ideal for every target size
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 | $4,499.00 | In stock Updated 8/5/2026 | View Offer - $4,499.00 |
| Starizona Starizona | $4,499.00 | In stock Updated 8/5/2026 | View Offer - $4,499.00 |
| 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.