CLAVE helical FOCUSER

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CLAVE  HELICAL  FOCUSER 
Helical screw Focusing Eyepiece mount with Capstan-handle control.  In Excellent, near new condition.
        The inside diameter of the  2 draw tubes allows it to be used with  1.25"  2 inch, and 50mm Clave Eyepieces.  One draw tube is 170mm long, [ Ref # 44.18.1]  and one is custom shortened as shown.  Along with two Adapters to 1.25". With a retainer Collar Ref # 44.2. 

This is a complete focuser unit - it does not insert into an existant focuser. It would replace the existant focuser. Or used by an ATM in a new build. 

Accurate  fine focus is achieved by means of multiple precise helical threads.  The eyepiece, camera, or accessory is  non-rotating. The Helical Focusing Range is 10mm.  
      The draw tube slides up & down through the very sturdy circular body of the focuser, for initial rough focus and can be tightened with set screw.  While the helical control zeros in for your final focus on your target object. 
       The well  made professional Capstan-handle allows precise focusing. Clave catologue mentions it was intended for f3 to f8 scopes. 500 grams. 
       It is mounted by placing the round focuser body thru a hole over a flat mounting board or any plate 1/4"+;   A sturdy round threaded ring screws on from the back to the treaded base from the back. to hold it in compression. See Catalogue drawing.  I invite any questions on mounting or use from perspctive buyers.

This focuser was used for less than a week. when purchased. and has been stored in a box since.  Declining health has led to my not  observing for some time  and am in the selling off my equipment and accessories acquired over many years doing ATM and visual Deep-sky astronomy. 

This wonderfully engineered, professional piece of CLAVE equipment was supplied by Les Appareils De Precision - Kinoptik on Feb 13, 1989 which I purchased from Roger Tuthill, Mountainside, N.J. March 6, 1989.  I paid a total $554 for these items.   This would appeal to users and collectors of  the famous CLAVE brand occulars and related fine astro equipment. 

Largely reduced price is  $299 USD.   Any Duty and taxes  paid by buyer. Shipping negotiable. Will be carefully packed. 
       Payment by International bank to bank wire transfer.  Will send info to assist using this this secure and reliable process.  Eyepieces not included.

Bob Drew,
Victoria , B.C. Canada.