Vixen R200SS User Manual

How to collimate the R200SS
First loosen all the three collimation “push” screws and tighten the other three collimation
“pull” screws on the primary mirror cell completely to “reset” the primary mirror to a
position where the primary mirror is placed closely to the mirror cell.
1 Remove the blue cap on the center of the four-vane spider to access adjustment
screws for collimation. Loosen the fixing screw on the dead center of the spider to remove
the secondary mirror holder with the mirror. There might be some washers on the center
fixing bolt with which the secondary mirror holder is attached and please take care not to
drop them onto the primary mirror.
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Vixen R200SS Specifications

General

Type	Reflector
Aperture	200 mm
Focal Length	800mm
Focal Ratio	f/4
Optical Design	Newtonian
Finder Scope	6x30
Mount Type	Equatorial
Resolving Power	0.58 arcseconds
Eyepieces	25mm, 10mm

Summary

How to Collimatethe R200SS

Secondary Mirror Preparation and Initial Adjustment

Prepare the secondary mirror by marking it and reassembling, then create a pinhole viewing disc for initial alignment.

Secondary Mirror Fine-Tuning and Alignment

Use a sight tube and pinhole disc to view a marked dot on the secondary mirror, adjusting its position for optical axis alignment.

Primary Mirror Alignment

Align the primary mirror using collimation push and pull screws, checking the reflection of the draw tube and secondary mirror.

Star Test

Perform a star test after collimation and allow the optics to cool to ambient temperature for final evaluation.