Astronomy Specialist

ASKAR 107PHQ APO QUADRUPLET f/7

$3,599.00AUD
SKU: AS-107PHQ

Askar

Apochromatic Petzval quadruplet

6.9 kg


 

The Askar 107PHQ is a professional apochromatic flatfield Petzval quadruplet with a focal ratio of f/7 and a corrected field of 44mm in diameter.

The Askar 107PHQ includes two Extra Low Dispersion glass elements for superb correction of chromatic aberration.

Differently from standard ED refractors, the Askar 107PHQ features a Petzval design that does not require to set the sensor to a specific distance to the last lens. That leaves the freedom to use any filter wheel, any off-axis guider or accessory without any worry to calculate the correct distance from the flattener. 

With a large 44mm fully corrected image circle and a focal ratio of f/7, this is the perfect astrograph for the advanced astrophotographer. The large rack and pinion 3.4" focuser has a massive 8kg payload capacity, can be rotated 360° to perfectly frame the subject and it has a reduction gear of 10:1 for precise focusing. Its long travel distance of 95mm allows use as a visual instrument as well as a capable astrograph.

All the lenses are fully multi-coated and the tube is internally flocked to reduce reflections and absorb stray light. The tube is made of CNC-machined aluminium, the rack and pinion focusing mechanism of brass and the mechanical components are engineered to provide the best rigidity, performance and durability.

 

 

The Askar 107PHQ comes with a variety of adapters to connect a wide range of imaging and visual accessories.

  


 

Specifications

 

Optical design Apochromatic Quadruplet air-spaced
Objective diameter 107 mm
Focal length 749 mm
Focal ratio f/7
Resolving power 1.29 arc seconds
Stellar limiting magnitude 12.85
Max. magnification 267 x
Light gathering power 234 times the human eye
Mount attachment Vixen style dovetail plate (300 mm long)
Focuser Rack & pinion dual speed (10:1) 3.4" diameter
Included connection adapters M86 x 1, M68 x 1, M54 x 0.75, M52 x 0.75, M48 x 0.75, 2"
Backfocus 149 mm (from the base of the M86 thread)
Tube weight 6.9 kg (including tube rings and dovetail bar)
Tube diameter 123 mm
Dew shield diameter 138 mm
SKU AS-107PHQ




Included items

 


  • Askar 107PHQ
  • Pair of tube rings
  • 300mm Vixen style dovetail bar
  • Carrying handle
  • Adapter M86 x 1 to M68 x 1
  • Adapter M68 x 1 to M54 x 0.75
  • Adapter M54 x 0.75 to M52 x 0.75
  • Adapter M52 x 0.75 to M48 x 0.75 with 2" filter thread
  • 2" visual back
  • Manual
Gallery

 

 

SL-17 The Dark Wolf Nebula by Steeve Body | Askar 107PHQ, ZWO ASI1600MM Pro, Antlia 3nm Pro SHO & LRGB filters.

 

 

 Small Magellanic Cloud by Steeve Body | Askar 107PHQ, ZWO ASI1600MM Pro, Antlia 3nm Pro SHO & LRGB filters.

 

 

M16 The Eagle Nebula by Steeve Body | Askar 107PHQ, ZWO ASI1600MM Pro, Antlia 3nm Pro SHO & LRGB filters.

 

 

M31 taken with Askar 107PHQ with ZWO ASI6200MM full frame camera.


ASKAR 107PHQ APO QUADRUPLET f/7.

ASKAR 107PHQ APO QUADRUPLET f/7

$3,599.00AUD

Optical design

Apochromatic Petzval quadruplet

Image circle

44 mm

Focal ratio

f/7

Aperture

107 mm

Focal length

749 mm

Optical thickness

Threads

M86 x 1 Male, M68 x 1 Male, M54 x 0.75 Male, M52 x 0.75 Male, M48 x 0.75 Male, 2" Barrel

Cooled

Colour or Mono

Pixel size

Sensor dimensions

Resolution

Sensor diagonal

Quantum efficiency

Read noise

Fullwell capacity

Bit depth

FPS

Camera backfocus

Filter size

Filter size

Bandpass (FWHM)

Bandpass (FWHM)

Glass thickness

Mount type

Payload capacity

Latitude range

Dovetail saddle

Slew speed

Encoders

Periodic error correction

Counterweight shaft

Azimuth adjustment range

Internal diameter

Illuminated diameter

Compatible telescope external diameter

Weight

6.9 kg

Length

Width

Height

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