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900X70 Refractor Telescope
Instruction Manual
For products #6001 & #6002 www.iOptron.com
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Table of Contents Table of Contents ............................................................................................................ 2 1. Telescope Assembly .................................................................................................... 3 1.1. 900X70 Assembly Terms ....................................................................................... 3 1.2. Telescope Assembly ...................................................................................
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1. Telescope Assembly 1.1. 900X70 Assembly Terms RA Axis DEC Axis Figure 1. 900X70 (1). Accessory holder tray (18). Counterweight (2). Aluminum tripod (19). Counterweight safety washer (3). Leg lock brackets (20). Counterweight locking knob (4). Tripod base (21). Equatorial mount head (5). Diagonal mirror (22). Lens cell (6). Eyepiece (23). Azimuth adjustment knob (7). Finderscope bracket (24). Latitude adjustment knob (8). Finderscope (25). Eyepiece holder tube (9). Finderscope
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Figure 2. Parts List Having trouble setting up or making it work? Email us at 900X70@ioptron.com We’ll be glad to help! 4
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6. Insert the base of the equatorial mount head 1.2. Telescope Assembly into the hole of the tripod base (4) and secure it using azimuth adjustment knob (23). Make sure the The numbers in brackets refer to the keys right ascension (R.A.) gear (21) is below the R.A. shown in Figures 1 & 2. setting circle (13). 1. Unpack and identify the components of your R.A. setting circle (13) telescope using the list shown in previous page. 2. Take the tripod legs (2) out of the package. Make sure
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9. Assemble the right ascension (R.A.) control 11. Loosen two screws at the end of the OTA. cable (27, short cable) and declination (Dec) control Mount the finderscope bracket (7) onto the cable (28). These cables are locked into position by telescope using these two knurled screws. firmly tightening the screws at the end of each Finderscope cable. Lock trench Screws to mount finderscope R.A. control cable (27) 12. Insert the diagonal (5) into the eyepiece holder tube (25
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the terrestrial system of latitude and longitude. 2. Understanding Celestial Motion and Coordinates In the system of R.A. and Dec. coordinates, stars are projected onto the "celestial sphere", i.e. onto Understanding where to locate celestial objects and the imaginary sphere where all of the stars appear to be located. how these objects move through the sky is fundamental to fully appreciating astronomy as a hobby. Most amateur astronomers use the same Understanding celestial coordinates
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constellation of Pegasus. The coordinates of the 3.3. Aligning Finderscope: Right Ascension range from 0h 0mn 0s to 24h 0mn 0s (not inclusive). Therefore, there are 24 primary The extended field of vision offered by the 5x24 R.A. lines located at 15 degree intervals along the mm finderscope (8) makes it easier to aim at an celestial equator. The objets that are further away, object before viewing it through the main telescope eastwards, from the primary Right Ascension grid tube with a
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loosen the Dec. lock knob (12). The telescope search the internet. For example, if your latitude is should now be able to move freely on the Dec. axis. 35° north, set the pointer to 35. Then retighten the Loosen the ring clamps on the tube rings (10) a few latitude knob. The latitude setting should not have turns, until you can slide the telescope tube forward to be adjusted again unless you move to a different and back inside the rings (this can be aided by viewing location some distance aw
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air and degrades the images seen through the 4. Using the Telescope telescope. Avoid viewing over rooftops and chimneys, as they often have warm air currents rising from them. Avoid observing from indoors With the telescope aligned on the pole, you are through an open (or closed) window, because the now ready to start your observations. temperature difference between the indoor and outdoor air will cause image blurring and distortion. 4.1. Getting familiar with you mount and Furthermor
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for the object Dec. setting circle Dec. mark Finding Objects With the Setting Circles Now that both setting circles are calibrated, look up R.A. mark in a star atlas the coordinates of an object you wish R.A. setting circle to view. Loosen the Dec. lock knob (12) and rotate the telescope until the Dec. value from the star atlas matches the reading on the Dec. setting circle (13). Remember that values of the Dec. setting circle are positive when the telescope is pointing north of the
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A Barlow lens is used to increase the magnification although storage in a garage or shed is OK. Small components like eyepieces and other accessories of each eyepiece. First insert the Barlow 3X lens in the telescope’s eyepiece holder, then the eyepiece should be kept in a protective box or storage case. Keep the caps on the front of the telescope and on itself. Secure the lens using thumbnail screws. The total magnification will be 135X when a 20 mm the focuser drawtube when not in use.
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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 Rack and pinion, accepts 1.25" eyepieces and Focuser accessories Eyepiece H12.5mm, H20mm diagonal 45º Erecting Prism, 1.25” Magnification with 45X (w/ 20mm), supplied eyepiece 72X (w/12.5mm) Barlow Lens 3X Finding Scope 5X24 Mount EQ-2, German equatorial Tripod Aluminum Motor drive Optional To
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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. The Prope
