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TS 2" Crayford focuser with micro reduction for Schmidt-Cassegrain telescopes
Setting the sharpness in Schmidt-Cassegrains is often a problem. The image wobbles when the main mirror is tilted. Also, the sharpness is adjusted from time to time, often making optimal photos or successful observations a gamble.
Our SC extract solves this problem. It is absolutely shift-free thanks to the Crayford friction principle and impresses with its excellent finish. The focus resistance is adjustable so that accessories weighing up to 2 kg can be properly focused.
Position the camera or eyepiece in the correct orientation without loosening the clamps. With an off-axis guide, simply locate the guide star without loosening the camera. This allows a 360° rotation. Simply loosen the thumb screw on the front of the focuser and you can easily rotate the entire focuser.
The 2" fittings are attached with a brass ring. Of course, the price includes a high quality 1.25" reduction with thread for 2" filters.
The adjustment range:
The adjustment range is about 25mm, that's more than enough. One roughly adjusts the focus with the main mirror, all other fine adjustments can be made with the focuser.
The focuser only works on telescopes with an aperture of at least 8" otherwise the focus knob is too close to the thread to allow assembly.
|Connection telescope side:
||2" SC thread (inside)
|Connection eyepiece side:
||2" and 1.25" receptacle
||90 mm with drawtube retracted
||approx. 700 grams