With its unique VISAC (Vixen Sixth-Order Aspheric Cassegrain) primary mirror, the optical system is composed of a concave primary mirror, a convex secondary mirror and a three-element field corrector. Especially noteworthy is its sharpness and flatness at the edge, which far exceeds that of Schmidt- Cassegrain systems of the same aperture. It provides a pinpoint star image of less than 15 microns, even at the edge of its 42mm image circle. The open tube design eliminates the dew problem that is

They can be used in place of a Barlow lens for imaging applications. Extends the focal length of the R150S from 750mm to 1500mm (f/10) and the R130S from 720mm to 1440mm (f/11). Model # AV-TE-3631 Focal Reducer R130S/R150S Focal reducers shorten the effective focal length of telescopes to provide wider visual fields and faster f-ratios for astrophotography. This focal reducers is for astrophotography only. Shortens the focal length of the R150S from 750mm to 652mm (f/4.3) and the R130S from 7

A 6x30 finder and l1/4" eyepiece adapter are included. (Shown with optional eyepiece, tube rings and dovetail plate on GP-type mount.) Model # TS-ON-8696 Wt: 4.8 kg / 10.6 lbs Newtonian: 130mm/5.1' @ f/S.S Parabolic multicoated mirror R130S OTA GP-Trim Great entry into Vixen quality! The R130S optical tube has 5.1" aperture and yields 0.89 arc-sec of resolution. At f/5.5 this is great for wide-field viewing and imaging of extended objects. 6x30 finder and 1/" eyepiece adapter. (Shown with

.. Shorten a leg which is the nearest the inclination of the vial or extend the furthest leg and draw the vial to the center. .. The other one leg is put, and next, expand and contract and put the vial in the center. At this time, the foot is not hung to the ferrule and the position of the ferrule does not shift. 3-5 Leveling with Electronic vial [Electronic vial screen] 1. If the Laser key is pushed, it becomes a display screen in the Electronic vial. 2. It returns to the former screen by the [

• Reflector sheet, Target and Prism do not face the instrument. • Reflector sheet, Target and Prism are not correctly sighted. • Measurement range is over in Reflectorless mode. • Sufficient signal does not return by sighting sharp edge etc. at Reflectorless mode. Change the object that has much better reflectivity, or use a reflecting sheet, or wait until the sun activity has weakened. Li-batt.voltage is low. • The Date Clock is powered by Have the lithium battery the built-in lithium battery.

Repair is needed if the message is displayed when it is properly leveled. Press the [ESC] key and enter the correct data. Select the correct target mode. Select a longer point, or use a tape measure. Change the object that has much better reflectivity, or use a reflecting sheet, or wait until the sun activity has weakened. Turn the power off, and then turn on again. Repair is needed when the message appears consistently. PENTAX R-300 (p65-88) 10/30/02 11:11 AM Page 80 13 APPENDIX 13-2 Atmospheri

Obtain the offset constant (K): K=AC - (AB+BC) [Adjustments] • Contact your local dealer for adjustment of the off-set constant when the K is not nearly 0. Instrument Prism Prism A B C A B C Instrument Prism 10.9 Beam axis and line of sight Be sure to check that the beam axis and line of sight are aligned when the adjustments on reticle and perpendicularity of line of sight to horizontal axis are made. [Checks] 4 3 2 1 Set the prism at a distance greater than 50m. Accurately sight the center of

(0.1mm) Normal 1.5sec. ( 1 mm) Track 0.4 sec. ( 1 cm) Yes No Phase differential --By main battery --Auto- focus / Power Focus / Manual Manual 1.5m -Normal range mode: — 70m (90m), / Long range mode 150m(180m) 1.5m - 3400m (4500m) 1.5m - 3000m (4000m) 1.5m - 2000m (2800m) 200m - 4500m (5600m) 200m - 4000m (5000m) 200m - 2800m (3500m) ±(5 + 2ppm x D)mm ±(5 + 3ppm x D)mm — R-322 (N) R-323 (N) R-325 (N) R-335 (N) R-315 (N) R-326 ±(2+2ppm x D)mm ±(3+2ppm x D)mm ±(5 + 3ppm x D)mm 76 PENTAX R-300 (p65-

.. The beam of the sun is strong and the watching confirmation is difficult at daytime outdoor. .. The laser beam is designed as the beam cannot be watched from eyepiece. .. Please appropriate the laser beam to the wall and mark the center, and confirm the amount of the gap (horizontal angle and vertical angle of a cross line ) beforehand when working like accurately putting out the direction by using the Laser pointer function. .. Please do not look at the laser source of beam directly. .. This

10.1 Electronic vial [Checks] 1 Align the electronic vial in parallel with a line joining any two of the leveling screws. Then, adjust the two screws to center the bubble in the eelectronic vial. Turn two leveling screws in an opposite direction mutually and have the bubble of the side of the electronic vial to the center. Make the bubble of the length of the electronic vial to the center by operating the leveling screw of one remainder. Rotate the instrument by 180° and confirm the position of