Askar 151 PHQ Flatfield APO Refractor
Askar 151 PHQ Flatfield APO RefractorAskar 151 PHQ Flatfield APO RefractorAskar 151 PHQ Flatfield APO Refractor
Askar 151 PHQ Flatfield APO RefractorAskar 151 PHQ Flatfield APO RefractorAskar 151 PHQ Flatfield APO Refractor

Askar 151 PHQ Flatfield APO Refractor

£4,399.00✓ 2 year warranty


Out of stock due 40-60 working days

About this product

Model:  askar_151_phq
Part Number:  151PHQ


Askar 151PHQ Flat Field Quadruplet/Petzval APO Refractor

The Askar 151PHQ is a large aperture refractor telescope with an f/7 focal ratio (151mm aperture and 1057mm focal length) and an impressive claimed 60mm imaging circle.

The 151PHQ's imaging circle can cover large camera sensors, including full-frame and even medium format! 

The triplet optics include two ED glass lenses that provide excellent control of chromatic aberrations. The additional fourth lens flattens the field). The 60 mm imaging circle has a fine spot diagram with minimal distortion of the peripheral stars and a central RMS radius of less than 2 microns. 

When used with the optional 3" 0.7 x flat field reducer, the telescope speed increases to f/4.9 with an effective focal length of around 740 mm.

The 151PHQ is fitted with a sturdy CNC-machined 3.4" focuser with a long focus range and a payload of up to 8 kg. The Rack & Pinion focus mechanism is decoupled from the draw-tube bearing. This enables precise focusing, even at maximum load.

1.25" & 2" adapters and an M86 screw-on-fitting thread are included. 

You can also fit a 2" star diagonal and eyepiece (not included) for wide-field or high-magnification visual astronomy. 

The multifunctional handle features a central slot with M6 screw fittings.

It also includes CNC-machine tube rings and a Losmandy-type dovetail plate. 


What's in the box

  • Telescope OTA
  • 300 mm Losmandy-style Dovetail
  • Tube Rings
  • Handle / Mounting Bracket
  • 2" to 1.25" Adapter
  • Set of 4-piece photographic adapters
  • Storage Case
  • Manual


Type Refractor
Aperture 151 mm
Focal Length 1057 mm
Focal Ratio f/7
Optical Construction

Quadruplet air-spaced APO (including two ED glass) 

Lens Coating Fully multi-coated
Tube Material Aluminium
Focuser 3.4" Rack & Pinion Dual Speed
Fine Focuser 1:10
Maximum accessory connection - Imaging
(with the focuser fully retracted)
78mm(from the base of M48×0.75 male thread)
Maximum accessory connection - Visual
(with the focuser fully retracted)
119mm (from the end of1.25" eyepiece holder)
Rear thread type M86×1-M68×1 
M54×0.75-M48×0.75(built-in M48×0.75 filter thread)
Four-piece photographic end adapter M48×0.75
Accessories Tube Rings, Losmandy-type Dovetail & Handle
OTA Weight 11.6 kg (25.6 lb)
Total Weight (Including tube ring&dovetail plate)  13.7 kg (30.2 lb)
Case Aluminium case


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