0 Items
Basket SubTotal: £0.00 Checkout
JTW Dall Kirkham 300mm f5.5
£9,089.00 inc. tax

£7,574.17 ex. tax
? Tax based on United Kingdom.

Description

JTW Astronomy Dall Kirkham 250mm f5.5


The Enhanced Corrected Dall-Kirkham (ECDK) telescope is our workhorse. This is the most economical route to a high performance telescope, often the performance of an RC is not needed, ECDKs are easier to manufacture and therefore are very cost effective. The tube assembly is semi-ruggedised and is of fail-safe construction.

The mirror supports in instruments under 600 mm are high precision floatation cells with full edge supports, larger mirrors are supported with kinematic face and edge supports. The focuser is included as standard, this is achieved by moving the secondary mirror. The ECDK includes a 2 element corrector with optional 3-element system and integrated ADC.


Specification


Aperture (mm) 300
Recommended mount type GEM
Tube tube Closed
Focal length (mm) 1650
OTA Weight (kg) 15
Back focus 175
Focal ratio F/ 5.5
Fully corrected imaging circle (mm) 45
Cooling fans Primary mirror
Airflow Rear
Mirror coatings Enhanced Aluminium + SiO2 protective layer
Focuser Integrated JTW Rhino
Clear aperture (mm) 50
Tube construction Carbon fiber
Optical surface quality (Strehl, PTV) 0.97, 1/10
Primary mirror substrate Schott Supremax 33
Primary mirror cell 9 point floatation cell
Primary baffle Solid with micro-baffling
Secondary mirror substrate Schott Supremax 33
Secondary mirror cell 3 point floatation cell
Secondary baffle Solid with micro-baffling
Bolting A4 Stainless steel
Metal protection Dual
Surface treatment Aluminium – 20 micron hard-coat anodising
Paint Exterior grade powdercoat (environmentally friendly)
Anti dew system Optional

Quantity:

Add to Cart
Product Code
- JTW-DallK
Product Condition
- New
Brand
- JTW OTA

Details

Product Images

Reviews

Related Products

Product Details

No Reviews Posted Yet - be the first!

write review

Featured Products

AstroTrac Adapter for PoleMaster
£32.00
StellarTune™ HEQ5 Mount
£259.00
Star Adventurer SuperCharged II
£139.00
William Optics Star 71 II 4 Element APO Refractor
£1,274.00
QHY5L-II Colour Camera /Guide Camera
£139.00
New StellarDrive™ Mounts
£1,899.00
Introduction to Astronomy Classes - 2016/17
£12.00
QHY5P-II-M Mono Camera
£199.00
Tune-up 60 StellarDrive™
£199.00
EQ6/NEQ6 Mount Belt Hypertune
£329.00
AVX StellarTune™
£329.00
QHY5L-II Colour Camera /Guide Camera
£139.00
StellarDrive AVX-R
£499.00
QHY5P-II Colour Camera
£159.00
Hypertune EQ8 Mount
£799.00
Service 60 - Sky-watcher
£149.00
QHY5-III 174 Mono
£524.00
StellarTune™ EQ5 Mount
£179.00
CloverFour EQ Silver
£40.00
StellarDrive™ EQ6 Class
£799.00
Astronomik CLS EOS / EOS XL Clip Filter
£104.00
darkframe tuning
Newsletter
  • Contact Us
    11 Drift Road, Clanfield, Waterlooville, Hampshire, PO80JJ, United Kingdom
    +44 23 9257 0283
    dave@darkframe.co.uk
    Product Added to your Cart
    x

    -------- OR --------

    google-site-verification: google9839cfa346600d85.html