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3.7 Target sighting [Auto focus] The Auto focus mechanism is very precise but will not function under every condition. There is a slight possibility of focusing failure owing to brightness, contrast, the shape and size of the target. In such a case, press the AF button and focus on the target by operating the Power focus key or the AF ring. No contrast like a white wall Bright back light Obstacle in front of a target A wall composed of single horizontal lines [Target sighting by Auto focus] The Auto focus of R-300X series has following two modes. Normal mode: Pressing AF button focuses on the target. Continuous mode: Pressing AF buttons for two seconds beeps, and releasing the key enters into the Continuous mode. This mode enables you to perform the Auto focus approx. for one minutes only by sighting through the telescope and following the target. 2 1 Normal mode: Press the AF button. Continuous mode: Press AF buttons for two seconds beeps and release the key. [Auto focus: Target sighting by Normal mode] 6 5 4 3 2 1 Loosen the telescope clamp and horizontal clamp screws. Point the telescope at the target using a collimator. Tighten the above two screws. Adjust the eyepiece. Look through the telescope and press the AF button. Move your eye vertically and horizontally to see if the target image moves in relation to reticle. Align the reticle accurately on the target using telescope and horizontal tangent screws. Collimator Target AF button Collimator Target sighting • If the target image does not move, there is no parallax. If it moves, eliminate the parallax. • Even when vertical angle measurement is not performed, it is recommended that the target should be placed at the reticle center. • Operating the Power focus key rotates the AF ring, so do not touch it while it is rotating. [Auto focus: Target sighting by Continuous mode] 7 6 5 4 3 2 1 Loosen the telescope clamp and horizontal clamp screws. Point the telescope at the target using a collimator. Tighten the above two screws. Adjust the eyepiece. Look through the telescope and then press the AF button for two seconds to beep, and release the key to enter into the Continuous mode. Align the reticle accurately on the target using telescope and horizontal tangent screws. Point the telescope to the next target as well. Collimator Target AF button Pressing AF buttons for two seconds beeps and release the key. Collimator Target sighting • Keep the target close to the reticle center when following it by the Continuous mode. • Continuous mode automatically ceases after approx. one minute. • Pressing the AF button or operating the Power focus key releases the continuous mode. • Operating the Power focus key rotates the AF ring, so do not touch it while it is rotating. [Auto focus: Target sighting by Power focus mode] 6 5 4 3 2 1 Loosen the telescope clamp and horizontal clamp screws. Point the telescope at the target using a collimator. Tighten the above two screws. Adjust the eyepiece. Look through the telescope, and then operate the Power focus key and focus on the target. Align the reticle accurately on the target using telescope and horizontal tangent screws. Collimator Target Power focus key Collimator Target sighting Collimator Target Power focus key Collimator Target sighting • Tilting the Power focus key “clockwise” makes it possible to focus on closer objects and “counterclockwise” will focus on farther objects. • Tilting angle of the Power focus key makes it possible to perform following three focusing speeds. Low speed: When tilted to middle position by approx. 5 degrees Middle speed: When tilted fully by approx. 10 degrees High speed : When tilted fully by approx. 10 degrees and passed one second • Operating the Power focus key rotates the AF ring, so do not touch it while it is rotating. [Target sighting by Manual focus] 6 5 4 3 2 1 Loosen the telescope clamp and horizontal clamp screws. Point the telescope at the target using a collimator. Tighten the above two screws. Adjust the eyepiece. Look through the telescope and then rotate the AF ring and stop it where the target can be seen clearly and the target image does not move in relation to reticle even if your eye is vertically and horizontally moved. Aligh the reticle accurately on the target using telescope and horizontal tangent screws. Collimator AF Ring Target Collimator Target sighting • The AF ring rotation “clockwise” makes it possible to focus on closer objects and “counterclockwise” will focus on further objects. 3.8 Attachment and detachment of tribrach The tribrach of R-322EX, 323EX, 325EX, 322NX, 323NX, 325NX, and 326EX are detachable from the instrument if required when replacing the instrument with a target or unit prism for example. [Detachment] First loosen the recessed screw with a screwdriver, then rotate the locking knob until the arrow points upward, and lift the instrument up. [Attachment] Mount the instrument on the tribrach with the g...

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