900X70 Refractor Telescope Instruction Manual For products #6001 & #6002 www.iOptron.
Table of Contents Table of Contents ............................................................................................................ 2 1. Telescope Assembly .................................................................................................... 3 1.1. 900X70 Assembly Terms ....................................................................................... 3 1.2. Telescope Assembly .............................................................................................. 5 2.
1. Telescope Assembly 1.1. 900X70 Assembly Terms RA Axis DEC Axis Figure 1. 900X70 (1). Accessory holder tray (2). Aluminum tripod (3). Leg lock brackets (4). Tripod base (5). Diagonal mirror (6). Eyepiece (7). Finderscope bracket (8). Finderscope (9). Finderscope collimation screws (10). Scope mounting ring (11). Main optical tube (12). Declination locking knob (13). Declination setting circle (14). Right ascension locking knob (15). Right ascension gear (16). Right ascension setting circle (17).
Figure 2. Parts List Having trouble setting up or making it work? Email us at 900X70@ioptron.
1.2. Telescope Assembly The numbers in brackets refer to the keys shown in Figures 1 & 2. 6. Insert the base of the equatorial mount head into the hole of the tripod base (4) and secure it using azimuth adjustment knob (23). Make sure the right ascension (R.A.) gear (21) is below the R.A. setting circle (13). R.A. setting circle (13) 1. Unpack and identify the components of your telescope using the list shown in previous page. 2. Take the tripod legs (2) out of the package.
9. Assemble the right ascension (R.A.) control cable (27, short cable) and declination (Dec) control cable (28). These cables are locked into position by firmly tightening the screws at the end of each cable. 11. Loosen two screws at the end of the OTA. Mount the finderscope bracket (7) onto the telescope using these two knurled screws. Finderscope Screws to mount Lock trench finderscope R.A. control cable (27) 10.
the terrestrial system of latitude and longitude. 2. Understanding Celestial Motion and Coordinates Understanding where to locate celestial objects and how these objects move through the sky is fundamental to fully appreciating astronomy as a hobby. Most amateur astronomers use the same visual path (or star-hopping) method for locating celestial objects.
constellation of Pegasus. The coordinates of the Right Ascension range from 0h 0mn 0s to 24h 0mn 0s (not inclusive). Therefore, there are 24 primary R.A. lines located at 15 degree intervals along the celestial equator. The objets that are further away, eastwards, from the primary Right Ascension grid line (0h 0mn 0s) carry rising R.A. coordinates.
loosen the Dec. lock knob (12). The telescope should now be able to move freely on the Dec. axis. Loosen the ring clamps on the tube rings (10) a few turns, until you can slide the telescope tube forward and back inside the rings (this can be aided by using a slight twisting motion on the optical tube while you push or pull on it). 6. Position the telescope in the tube rings (10) so it remains horizontal when you carefully let go with both hands.
4. Using the Telescope With the telescope aligned on the pole, you are now ready to start your observations. 4.1. Getting familiar with you mount and telescope Before observing a celestial object, looking at terrestrial objects during the day provides a good exercise on how to operate the mount and telescope. 4.2. Star observation First of all you will need to choose an object that is easy to find. The Moon or a bright star is a good target to start with. 1.
for the object Dec. setting circle Dec. mark Finding Objects With the Setting Circles R.A. mark R.A. setting circle The mount’s R.A. setting circle (16) is scaled in hours, from 1 through 24, with small marks in between representing 6-minute increments. The numbers closest to the R.A. axis gear apply to viewing in the Southern Hemisphere, while the numbers above them apply to viewing in the Northern Hemisphere. The Dec. setting circle (13) is scaled in degrees, with each mark representing 2° increments.
A Barlow lens is used to increase the magnification of each eyepiece. First insert the Barlow 3X lens in the telescope’s eyepiece holder, then the eyepiece itself. Secure the lens using thumbnail screws. The total magnification will be 135X when a 20 mm eyepiece (45X) and a 3X Barlow lens are used together. Barlow lens although storage in a garage or shed is OK. Small components like eyepieces and other accessories should be kept in a protective box or storage case.
6. Technical Specifications Optical tube Aluminum Optical Design Achromatic Refractor Objective lens Air-spaced, fully coated Clear Aperture 70 mm Focal Length 900mm Focal Ratio f/12.8 Focuser Rack and pinion, accepts 1.25" eyepieces and accessories Eyepiece H12.5mm, H20mm diagonal 45º Erecting Prism, 1.25” Magnification with supplied eyepiece 45X (w/ 20mm), 72X (w/12.
IOPTRON ONE YEAR LIMITED WARRANTY A. iOptron warrants your telescope, mount, or controller to be free from defects in materials and workmanship for one year. iOptron will repair or replace such product or part which, upon inspection by iOptron, is found to be defective in materials or workmanship. As a condition to the obligation of iOptron to repair or replace such product, the product must be returned to iOptron together with proof-of-purchase satisfactory to iOptron. B.
