Astronomy Specialist

ASKAR 140APO f/7 TRIPLET REFRACTOR

$3,599.00 AUD
SKU: SS-140APO

Askar

Apochromatic triplet

140 mm

f/7

980 mm

9.2 kg


Flattener

 

The Askar 140APO is an apochromatic triplet refractor that offers high performance for a low price compared to other large triplets on the market. The objective lens features an element of extra-low dispersion glass (ED) that minimizes chromatic aberration. 

 

 

The Askar 140APO is available either on its own, or with either the 1x flattener or 0.8x reducer.

In its standard configuration the Askar 140APO is a high performance 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 140APO 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 784mm and focal ratio to f/5.6.

 

 

The 3.5" 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 140APO 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 air-spaced ED triplet

Objective diameter

140 mm

Focal length

980 mm

Focal ratio

f/7

Resolving power

0.83 arc second

Stellar limiting magnitude

13.43

Max. magnification

350 x

Light gathering power

400 times the human eye

Mount attachment

300 mm Losmandy-style dovetail

Focuser

3.5" rack & pinion dual speed 1:10

Tube weight

9.2 kg (10.9 kg with dovetail and rings)

Tube length

735 mm (870 mm with dew shield extended)

Tube diameter

150 mm

Dew shield diameter

162 mm

Connections

2", 1.25", M92 x 1 female

Flattener/reducer back focus

55 mm from M48 thread

Threads on tube rings

TBD

Distance between tube rings

200 mm

 

 

 

 

      

    • 140APO OTA
    • Pair of tube rings
    • 300mm Losmandy bar
    • 2" visual back
    • 1.25" eyepiece adapter
    • Manual
    • Soft carry case 

     

     

    NGC 1499 by Drew Evans | Askar 140APO + 1x flattener, ZWO ASI6200MM Pro.

     

     

    Theta Tauri by Drew Evans | Askar 140APO + 1x flattener, ZWO ASI2400MC Pro.

     

     

    Caldwell 14 by Drew Evans | Askar 140APO + 1x flattener, ZWO ASI2400MC Pro.

     

     

    IC 434 by Drew Evans | Askar 140APO + 0.8x reducer, ZWO ASI2400MC Pro.

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    ASKAR 140APO f/7 TRIPLET REFRACTOR

    From $3,599.00 AUD

    Flattener

    • OTA only
    • With 1x flattener
    • With 0.8x reducer

    Optical design

    Apochromatic triplet

    Image circle

    Focal ratio

    f/7

    Aperture

    140 mm

    Focal length

    980 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

    9.2 kg

    Length

    Width

    Height

    View product