PlaneWave 20″ Optimised Dall Kirkham Telescope

$77,599.00

AUD Price shown includes GST
GST is removed at checkout for NZ

SKU: 200120Q
Conditionnew
F-Number6.8
Focallength3454

 



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    The PlaneWave 20″ Optimised Dall-Kirkham has been design with coatings that are optimized to transmit in infrared or ultra violet wavelengths.  It is diffraction limited across a 20mm image circle at the focal plane.  There are no refractive lens, only reflective components to the design.  For IR application, reflectives coatings are a protected gold which give better than 98% reflectivity from .65 micron (650nm) to 5 micron (5000nm).  This design is ideal for infrared astronomy or LIDAR applications.  UV optimized coatings can also be used at an additional cost.

    The PlaneWave 20″ Optimised Dall-Kirkham has been design with coatings that are optimized to transmit in infrared or ultra violet wavelengths.  It is diffraction limited across a 20mm image circle at the focal plane.  There are no refractive lens, only reflective components to the design.  For IR application, reflectives coatings are a protected gold which give better than 98% reflectivity from .65 micron (650nm) to 5 micron (5000nm).  This design is ideal for infrared astronomy or LIDAR applications.  UV optimized coatings can also be used at an additional cost.

    OPTICAL SYSTEM

    Aperture 20″ (.51m)
    Focal Length 3454 mm
    Central Obstruction 39% of the Primary Mirror Diameter
    Back Focus 8.9″ from focuser mounting surface, 5.81″ from racked in focuser
    Weight 140 lbs
    OTA Length 47″
    Upper Cage Carbon Fiber Truss
    Lower Cage Carbon Fiber Truss with Carbon Fiber light shroud
    Dimensions Overall Dimensions

    SECONDARY MIRROR

    Diameter 7.5″
    Material Precision Annealed Pyrex
    Shape Spherical
    Coating Protected Gold Reflective Coating – 98% (.65-16micron)

    SECONDARY MIRROR

    Material Precision Annealed Pyrex

    TERTIARY MIRROR

    Material Precision Annealed Pyrex

    STANDARD FEATURES

    Carbon Fiber Truss Design Minimizes thermal expansion which causes focus shift with changes in temperature
    Dovetail expansion joint Allows for the difference in thermal expansion between carbon fiber and aluminium. The expansion joint allows the aluminium dovetail expand and contract without stressing the carbon fiber lower truss
    Cooling Fans Three cooling fan blow out of the optical tube pulling air though the telescope and pass the primary mirror. This helps the telescope to reach thermal equilibrium quickly. The fans are controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased.

    SHIPPING

    Crated Shipping Weight 291 lbs   (132.0 kg)
    Crate Width 32 inch   (813 mm)
    Crate Height 36 inch   (914 mm)
    Crate Length 59 inch   (1,499 mm)

    NOTE: This item has a lengthy leadtime. for more details email: education@bintel.com.au 

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