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OMC 250 SP Dimensions :

Total telescope weight 27kg
Tube weight only 9kg
Tube diameter 278mm
Tube length 610mm
Focal Length 2250mm
Focal ratio f9
Standard Optical Coatings
1/4PV Wavefront Optics
30mm Finder

(All weights approx)

250mm Sub Aperture Maksutov on Sphinx Computer Controlled Mount.

We combined the 'wish lists' of many world renowned and respected CCD users and, designed many of the telescopes parameters around their suggestions.

Open, air cooled cell for rapid cooling. Rotatable vent cooled for easy covering when ambient temperature achieved. No full aperture corrector plates at the open tube end. On a large aperture, doomed to dew and totally disrupted images. Sub aperture corrector plate allows cooling and stabilising of image up to 5 times faster than closed tube designs. Focal length 2250mm Weight 9kgm, 20lbs. Four vane secondary support (OMC Spider is made from solid aluminium to give ultimate strength and total collimation stability).

Fixed primary. means that mirror rock and image shift on competing traditional designs, especially SCT's, gone forever, guaranteed.

275mm back focal length. Enough for virtually any accessory considered. Even if you have a non standard accessory. Secondary support system allows you to easily adjust the focal plane to suit your exact needs over a wide range of positions.

Diffraction limited for 10mm field, maximum of 40 micron spot size at 20mm field. Basically, incredible in visual observing and also, gives outstanding CCD image quality with some of the largest CCD chips available. Full length dovetail plate on tube to suit standard size dovetail receivers. Larger dovetails available. Collimation mechanics are 'fool proof'

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