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Collimation of the SharpStar 150HNT
【Preparation is Required before Collimation】
Sharpstar 150 Hyperboloid Newtonian Reflector, Allen Wrenches, Laser Calibrator, Crosshair
Eyepiece, 150 Reducer-specific tool, Depth measuring tool.
Sharpstar 150 Hyperboloid Newtonian Reflector
Allen Wrench
Laser Calibrator
Crosshair Eyepiece
【Connection Way】
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Summary of Contents for SHARPSTAR 150HNT
- Page 1 Collimation of the SharpStar 150HNT 【Preparation is Required before Collimation】 Sharpstar 150 Hyperboloid Newtonian Reflector, Allen Wrenches, Laser Calibrator, Crosshair Eyepiece, 150 Reducer-specific tool, Depth measuring tool. Sharpstar 150 Hyperboloid Newtonian Reflector Allen Wrench Laser Calibrator Crosshair Eyepiece 【Connection Way】...
- Page 2 Owing to the existence of diopter in the reducer，the reducer assembly must be removed in order to collimate the 150HNT. Put the Reducer removing specific tool with its two sharp points into the two holes in the reducer group frame accordingly, and then turn the tool to take the reducer group off, now only unscrew Reducer assembly and Re-install connector ring to focuser and then conical 1.25”...
- Page 3 SETP 2: Primary Mirror cell Back plate. Now go to Primary mirror cell back plate as look like in figure below. PM cell back plate has the three small screws( For Tilt) and three large screws(For locking) for collimation, all six screws should be tight.
- Page 4 SETP 5: Next, adjust the three set screws on the cross of secondary mirror to center the laser dot on the black circle(diagonal section on laser), and pre-tighten them to hold the secondary mirror (from slightly contact in Step 1).(see figure below). SETP 6: It then becomes necessary to Go to PM cell back plate and loosen very little the three large screws and adjust carefully little movement the three small screws to further center the...
- Page 5 SETP 7: (This step may not be required) Because the short focal ratio(F/2.8) can lead to a more sensitive light axis, and thus the adjusted axis in Step 6 may be offset again in the process of tightening the small screws on the back circle.
- Page 6 STEP 4: Looking through focuser Crosshair Eyepiece. Point of interest for Perfectly collimated telescope: collimation eyepiece crosshairs, primary mirror clips or edge, primary mirror center dot, secondary mirror reflection Spider and focuser drawtube in your field should be concentric. If not then, Adjustment of the secondary mirror group and using the wrench with set screws on the cross to control the position of the secondary mirror so that the circle of the primary mirror is moved to be concentric with the circle of the secondary mirror as seen through the collimating...
- Page 7 STEP 5: Now go back to Primary mirror back plate, It’s now necessary loosen the three large screws to center the primary mirror mark on hole placed on the collimating eyepiece. Then tighten the small screws. STEP 6: Turn the focuser or the crosshair eyepiece, as seen the crosshair of crosshair eyepiece and the crosshair of secondary mirror have the same center.
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