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Takahashi Mewlon-250S Cassegrain OTA w/Dual Ring

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Price:
$4,737.00
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Product Description

The Mewlon Series of Dall-Kirkham Telescopes by Takahashi combines refractor-like performance in a larger folded optic reflector design. 

Primary mirror 260mm F/3

Secondary mirror 72mm /X4

Secondary Obstruction 29%

Finder scope 7x50 6.3°

Gross wt. of main tube assembly 12.5kg (27.5lbs)

Price includes a Frauhaber Swiss Electric Focus Motor for secondary (no image shift whatsover) and BRC-250 tube holder.

NOTE:  Photo does not illustrate the double-ring tube holder.
Images to the left are depicting Mewlon 210.

You have dreamed of a reflector with exceptional and powerful optics, with a generous diameter and with the guarantee of an incredible contrast : Mewlon is for you ! Mewlon are Cassegrain reflectors using the Dall-Kirkham optical design. The elliptic primary mirror is associated with a spherical secondary mirror. The image is returned to the back of the instrument via an opening spared in the center of the primary mirror.

With its Cassegrain range reflectors, based on Dall-Kirkham optical design, Takahashi acted as a pioneer, and made Schmidt-Cassegrain other manufacturers outdated. This reflector with its excellent optical qualities can be used in a wide range of applications, and brings it on the top of the market. No worldwide mass production of reflectors can be compared to the Mewlon and be able to offer similar performances : compactness, power, rationality and versatility.

The precision of optical surfaces is at least of ?/20. This standard of quality induces a strong concentration of the light in Airy disc, physical image of a star looked through any optical system. The stellar images are more defined and contrasted. The Mewlon primary mirror, oversized compared to the effective aperture, is installed in a mirror cell especially designed to avoid stresses sometimes generating of astigmatism.

The focuser, often one of the weak points of the current telescopes, was particularly neat. The translating mechanism of the primary mirror of Mewlon 180mm and 210mm is machined with a particular care in the Takahashi workshops in order to reduce the shifting, to obtain a softness and an optimal regularity of focusing. Mewlon 250mm and 300mm are equipped with a the secondary mirror translating focuser, ordered with an electric handbox.
Equipped with a 50.8mm eyepiece holder in standard, you will be able to associate the most appropriate accessory with it, for visual, photographic or CCD use. The complete and coherent range of accessories proposed, will reach any of your goals.

The fixing of Mewlon on equatorial mountings is carried out using functional and effective dovetails. Their design facilitates frequent handling such as balancing or OTA assembly/disassembly without deterioration. Moreover, on Mewlon of large diameters, a counterweight is provided to balance the optical tube.
Mewlon integrates a high quality finder scope, associating luminosity and sharpness. This finder scope can also be used as a handle for transportation, without creating any bending or malfunctioning.

The Mewlon Series of Dall-Kirkham Telescopes by Takahashi combines refractor-like performance in a larger folded-optic reflector design. The M-250 features an eletrically-movable secondary mirror for shift-free precision focusing.

 Price includes a Frauhaber Swiss Electric Focus Motor for secondary (no image shift whatsover) and BRC-250 tube holder.

 NOTE:  Photo does not illustrate the double-ring tube holder.

Specifications

Effective aperture:  250mm
Focal length:  3000mm/2307mm w/reducer
Focal ratio:  F/12-F/9.2 w/reducer
Resolution:  0.46"
Limiting magnitude:  13.8
Light grasp:  1275x
Image circle:  ø21mm/ø42mm
Photographic field:  1.0° w/reducer
Total length of main tube:  850mm
Diameter of main tube:  ø280mm
Primary mirror:  260mm F/3
Secondary mirror:  72mm /X4
Secondary Obstruction:  29%
Finder scope:  7x50 6.3°
Gross wt. of main tube assembly:  12.5kg (27.5lbs)


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