TAKAHASHI CORRECTED MEWLON-250CRS

TAKAHASHI SKU: TLK25300

$8,320.00

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     Takahashi's Dall-Kirkham "Mewlon" series reflectors are long focal length telescopes with high F/D focal ratio. The primary mirror is ellipsoidal while the secondary mirror is spherical. The surface accuracy of the optics is at least λ/20.

     The CRS models incorporate a field corrector with ED glass lenses that provides a F/10 focal ratio along with a larger, more corrected field thus converting the telescope into a flat-field instrument for imaging and visual observation.  In addition, the CRS series has an electronic focusing system controllable with an ASCOM driver or in an autofocus mode.  Each CRS telescope features a primary mirror cooled by 3 fans.

     The motorized focusing, ASCOM compatible, is done by translating the secondary mirror. The fans responsible for heating the primary mirror are managed by 3 temperature sensors located inside and outside the tube.

     The Mewlon-250CRS is perfectly suited for planetary observation and imaging, due to its long focal length. It is also ideal for deep sky applications; equipped with the F/7.3 reducer it will allow the imaging of compact objects such as planetary nebulae or galaxies. The integrated 7x50 finder scope is adjustable and serves as a handle for transport.

     The optical tube assembly is delivered with a pair of rings connected by a massive plate located under the tube.

 

CHARACTERISTIC TAKAHASHI MEWLON-250CRS REFLECTOR
Optical design Modified Dall-Kirkham
Combination Concave elliptical primary mirror + convex spherical secondary mirror + field corrector
Diameter 250 mm
AT PRIME FOCUS
Focal length 2500 mm
Focal ratio F/10
Image circle diameter 40 mm
Metal Back Distance 147.9 mm
WITH RD CR0.73X FOCAL REDUCER
Focal length 1825 mm
Focal ratio F/7.3
Image circle diameter 35 mm
Metal Back Distance 72.2 mm
WITH EX CR1.5X FOCAL EXTENDER
Focal length 3780 mm
Focal ratio F/15.1
Image circle diameter 44 mm
Metal Back Distance 117.5 mm
CHARACTERISTIC TAKAHASHI MEWLON-250CRS REFLECTOR
Length of the optical tube assembly 945 mm
Diameter of the optical tube assembly 280 mm
Weight 12 kg

Spot-diagram of Takahashi Mewlon-250CRS reflector at prime focus

Spot-diagram of Takahashi Mewlon-250CRS reflector with RD CR0.73X focal reducer

 

Please note: mount, tripod, and tube holder sold separately.

 

Included in the box:

Optical Tube Assembly (w/finder)

M92-72 Coupling TKP84111

50.8 (2") Sleeve TKP00113

Coupling (S) TKP00103

Aux. Ring (prime focus) TKP83002

Ocular adapter (31.7) TKP00101

Ocular adapter (50.8) TKP82110

Extension tube (50.8) TKP31112

 

System Charts

Mewlon-250CRS System Chart

Mewlon 250CRS System Chart with 1.5X Extender