Brand: SharpStar

Askar 151PHQ Quadruplet Refractive Astrograph (151PHQ)

151PHQ

Brand: SharpStar

Askar 151PHQ Quadruplet Refractive Astrograph (151PHQ)

151PHQ

  • 151mm aperture
  • 1057mm focal length
  • Quadruplet air-spaced APO design
  • Supports full frame
  • < 2μm central RMS radius 
  • No need for flattener
  • No need to calculate backfocus
  • Retractable lens hood
  • 300mm dovetail plate
  • Multi-functional handle
  • 3.4" rack-and-pinion focuser
  • 1:10 fine adjustment
  • Various adapters included
Special Order
$4,399.00 USD

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Special Order
$4,399.00 USD

Easy Payment Options with .

How do I Special Order?
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Full Details What Can I See? What's in the Box? Specifications Reviews and Questions Articles, Videos, Software, Links

Product Description

151PHQ is a long-focal-ratio, flatfield astrograph newly launched after 130PHQ and also the biggest refractor of Sharpstar products till now. Instead of buying extra flatteners, calculating the backfocus of the flattener, or making a tedious connection to match the distance, astrophotographers can simply equip it with any possible imaging devices, make the target stay at the focus, and then the whole optical system is perfect for imaging.

151PHQ has a focal ratio of f/7 and a focal length of 1057mm. The aperture is 151mm, which is the largest of Askar refractors so far. The quadruplet lens with two ED glasses offers excellent control of chromatic and other aberrations. With its self-flattening design, 151PHQ offers strong advantages in the astronomical shooting. It supports a medium frame 60mm image circle, has a fine spot diagram with tiny distortion of the peripheral stars, and its central RMS radius is less than 2 microns.

151PHQ comes with a telescopic lens hood, a high-quality CNC machined and painted tube, and attractive decorative parts. The 3.4" R&P focuser comes with M68/M54/M48 adapters, 360°rotator and a finder base. When used with the 3" 0.7 x flat field reducer, the telescope can reach a focal ratio of f/4.9 and a focal length of 740mm, effectively reducing exposure time. The multifunctional handle comes with a central slot for attaching an M6 screw with an M6 screw hole. A standard 300mm Losmandy dovetail plate, together with a sturdy double tube ring, is perfectly suited for viewing and shooting.

What can I see with a Askar 151PHQ Quadruplet Refractive Astrograph (151PHQ)?

Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.

Jupiter with

25mm Eyepiece - 42x Magnification

(Sold Separately)

Jupiter with

10mm Eyepiece - 106x Magnification

Sold Separately

Jupiter with

5mm Eyepiece - 211x Magnification

Sold Separately

Moon with 25mm Eyepiece

42x Magnification

(Sold Separately)

Moon with 10mm Eyepiece

106x Magnification

Sold Separately

Moon with 5mm Eyepiece

211x Magnification

Sold Separately

Andromeda with 36mm Eyepiece

29x Magnification

Sold Separately

Andromeda with 25mm Eyepiece

42x Magnification

(Sold Separately)

Andromeda with 10mm Eyepiece

106x Magnification

Sold Separately

What's in the Box

  • 151PHQ Optical Tube
  • A pair of rings
  • A handle
  • A 300mm vixen dovetail plate
  • A set of four-piece photographic adapters
  • Aluminum box
  • A manual

Specifications

Aperture 151mm
Focal Length 1057mm
Focal Ratio f/7
Objective Type Quadruplet air-spaced APO (including two ED glass)
Image Circle 60mm
Maximum accessory connection (with the focuser fully retreated):
Imaging Mode
78mm(from the base of M48×0.75 male thread)
Maximum accessory connection (with the focuser fully retreated):
Observing Mode
119mm (from the end of1.25" eyepiece holder)
Overall Length Observing mode:930.3mm(with the dew shield contracted)1117.8mm(with the dew shield fully stretched)
Imaging mode:976.8mm(with the dew shield contracted)1164.3mm(with the dew shield fully stretched)
Net Weight 11kg
Gross Weight 13kg
Rear-end thread type M86×1-M68×1
M68×1-M54×0.75
M54×0.75-M54×0.75
M54×0.75-M48×0.75(built-in M48×0.75 filter thread)
Four-piece photographic adapter M48×0.75

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