Astronomy Specialist

ASKAR 120APO f/7 TRIPLET REFRACTOR

$2,799.00 AUD
SKU: SS-120APO

Askar

Apochromatic Triplet

120 mm

f/7

840 mm

6.5 kg


Configuration

 

The Askar 120APO is an apochromatic triplet refractor that offers high performance for a low price compared to other similarly-sized triplets on the market. The objective lens features an element of extra-low dispersion glass (ED) that minimizes chromatic aberration. 

 

 

The Askar 120APO is available either on its own, or with either the 1x flattener or 0.8x reducer.

In its standard configuration the Askar 120APO is a fine visual instrument with excellent optical quality and native compatibility with binoviewers when the rear section of the tube is removed. This modular design makes the 120APO a supremely versatile telescope.

 

 

The optional 1 x field flattener corrects the field curvature of the system, allowing for photographic use with sensors up to full frame. The optional 0.8 x reducer brings the focal length down to 672mm and focal ratio to f/5.6.

The 3.3" dual-speed rack & pinion focuser is precise and rigid. It is natively compatible with most motorized focusers on the market including the ZWO EAF. The focuser includes an accurate distance scale with 10cm of travel. On the rear there is a 360 degree rotator with fine rotation angle markings for precise framing.

 

 

Unlike most refractors, the 120APO includes two finderscope bases on either side of the focuser, allowing you to attach both a standard guide scope and control unit such as the ASIAIR without the need for additional accessories. The handlebar also includes a finder-style slot, allowing for even more possibilities.

The inner surfaces of the retractable dew shield are covered with matte felt and the interior of the telescope tube has matte paint and internal baffles, to reduce internal reflections and light scattering.

Note: the mount shown in the product images is not included with the telescope.

 

 

 

Optical design

Apochromatic ED triplet

Objective diameter

120 mm

Focal length

840 mm

Focal ratio

f/7

Resolving power

0.97 arc second

Stellar limiting magnitude

13.1

Max. magnification

300 x

Light gathering power

293.9 times the human eye

Mount attachment

290 mm Vixen-style dovetail

Focuser

3.3" rack & pinion dual speed 1:10

Tube weight

5.7 kg (6.5 kg with dovetail and rings)

Tube length

722 mm (804 mm with dew shield extended)

Tube diameter

110 mm

Dew shield diameter

139 mm

Connections

2", 1.25", M84 x 1 female

Flattener/reducer back focus

55 mm from M48 thread

Threads on tube rings

TBD

Distance between tube rings

TBD

 

  

  • 120APO OTA
  • Pair of tube rings
  • 290mm Vixen bar
  • 2" visual back
  • 1.25" eyepiece adapter
  • Manual
  • Soft carrying case

 

 

     

     

    Statue of Liberty nebula by Simon Kidd | Askar 120APO, ZWO ASI533MC Pro, 33 hours of exposure time.

     

     

    M33 | Askar 120APO + 1.0x flattener, ZWO ASI6200MM Pro.

     

     

    Soul Nebula | Askar 120APO + 1x flattener, ZWO ASI6200MM Pro, Antlia 3nm SHO filters.

     

     

    Magnified view showing the typical correction of the 120APO with optional 1 x flattener.

     

    Customer Reviews

    Based on 1 review
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    S
    Simon Kidd
    Askar does it again!

    Very happy so far with the purchase and have managed to process a couple of pics so far under very windy conditions.
    Used the field flattener to give a focal length of 840mm.
    Coupled with the EAF and ASI air plus, this is a great addition to my Askar 65PHQ

    ASKAR 120APO f/7 TRIPLET REFRACTOR

    From $2,799.00 AUD

    Configuration

    • OTA only
    • WITH 1 x FLATTENER
    • WITH 0.8 x REDUCER

    Optical design

    Apochromatic Triplet

    Image circle

    44 mm

    Focal ratio

    f/7

    Aperture

    120 mm

    Focal length

    840 mm

    Optical thickness

    Threads

    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

    6.5 kg

    Length

    Width

    Height

    View product