Carson Optical RP-300 instruction manual Specifications, Adjusting the Primary Mirror

Fig.12 Fig.13

	Adjusting the Primary Mirror:
	If the telescope is properly collimated you should see the diagonal mirror
	(See Fig. 10) at the exact center of the primary mirror. If the diagonal
	mirror appears off-center (See Fig. 12) you will need to adjust the primary
	mirror (See Fig. 10) located on the outside lower-end of the main tube. To
	do this you will first need to loosen the primary mirror locking screws (Fig.
	9-39). These are the screws that are flush against the surface of the telescope.
	Then alternately loosen and tighten the Primary Mirror Tilt Screws until the
	diagonal mirror is centered inside the primary mirror. The primary mirror
	screws are easily identified because they stick out from the surface of the
	telescope. Once the adjustment is complete, re-tighten the primary mirror
	locking screws.
	Night Time Star Collimation Testing:
	• To test the accuracy of your collimation, equip your telescope with
	the 20mm eyepiece and focus on a moderately bright star.
	• With the star centered in the field of view, slowly turn the focus
	wheel (Fig. 1-4) until the star is out of focus.
	• If properly collimated, you should see a series of concentric circles
	around a black center dot (Fig. 13-C).
	• If the circles are not concentric and the black dot is not centered
	(Fig. 13A) you will need to make adjustments to the primary mirror.
	Loosen the primary mirror locking screws (Fig. 9-39) and use the
	R.A. and Dec. cables to move the circles to the edge of the telescope
	field of view (Fig. 13-B). Then turn the primary mirror tilt screws
	(Fig. 9-40) until the black dot moves to the center of the image with
	the concentric circles radiating from it (Fig. 13-C). Once centered,
20	tighten down the locking screws.

Specifications:

Optical Design:	Newtonian Reflector
Aperture:	114mm (4.49”)
Focal Length:	900mm (35.43”)
Focal Ratio:	7.89
Finder Scope:	6x30mm
Eyepiece 1:	Kellner 20mm
Magnification 1:	45x
Eyepiece 2:	Kellner 9mm
Magnification 2:	100x
Mount:	Equatorial
Weight:	19.7 lbs.

Warnings:

•Never use this telescope (or its viewfinder) to look directly at or near the sun. Viewing the sun can cause instant and irreversible eye damage.

•Always supervise children when using this telescope.

•Do not leave telescope unattended at any time. Untrained adults or children may not be familiar with the correcting operating procedure.

•Do not point the telescope at the sun even when you are not looking through it. This will cause internal damage to the telescope.

•Handle this telescope with care. Rough handling might knock the internal optical components out of alignment.

21