Orion PRO 120 EQ instruction manual Azimuth

Azimuth	Post
adjustment
knobs

Figure 2. Orient the equatorial mount so that the post on the tripod head lines up between the azimuth adjustment knobs on the equatorial mount.

Finder scope bracket	Nylon
	alignment
	thumbscrews
Finder scope

Tensioner

Focus lock ring

as they will go. Keep the tripod legs at their shortest (fully retracted) length, for now; you can extend them to a more desirable length later, after the scope is fully assembled.

2.Place the base of the equatorial mount onto the tripod head. Orient the equatorial mount so that the post on the tripod head lines up between the azimuth adjustment knobs on the equatorial mount (Figure 2). You may need to loosen the azimuth adjustment knobs on the equatorial mount in order to fit the mount into the tripod head.

3.Thread the central support shaft into the equatorial mount until tight. This will secure the equatorial mount to the tri- pod head.

4.Remove the knob and washer from the bottom of the center support shaft. Slide the tripod support tray up the bottom of the central support shaft until the three tray arms are touching the legs of the tripod. The flat side of the acces- sory tray should be facing up. Make sure the “V” of each tray arm is against a tripod leg. Place the washer back on the center support shaft against the tray, and thread the securing knob all the way up the center support shaft until it is tight against the tray. The tripod support tray provides additional stability for the tripod, and holds five 1.25" eye- pieces and two 2" eyepieces.

5.Thread the latitude adjustment L-bolt into the rear of the equatorial mount casing as shown in Figure 1.

6.Thread the counterweight shaft into the equatorial mount at the base of the declination axis until tight. Make sure the casting at the top of the shaft is threaded clockwise as far as it will go before attaching the shaft. Once the shaft is installed, turn the casting counter-clockwise until the top of the casting is flush with the mount.

7.Remove the knurled “toe saver” retaining screw on the bottom of the counterweight shaft and slide both counter- weights onto the shaft. Make sure the counterweight lock knobs are adequately loosened to allow the counterweight shaft to pass through the hole. Position the counterweights

Figure 3a. The 8x40 finder scope.

Figure 3b. Pull-back on the tensioner and slide the finder scope into its bracket until the O-ring is seated in the bracket ring.

about halfway up the shaft and tighten the lock knobs. Replace the toe saver at the end of the bar. The toe saver prevents the counterweights from falling on your foot if the lock knobs happen to come loose.

8.Attach the slow-motion control knobs to the right ascen- sion and declination worm gear shafts of the equatorial mount by sliding them onto the shafts. Line up the flat on the end of the shaft with the corresponding feature on the interior of the knob to attach them properly. The knobs can be attached to either end of the shafts; use whichever end is most convenient.

9.Attach the tube rings to the tube ring mounting plate using the attachment screws that are on the tube rings. The screws should go through the holes on the outer ends of

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