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Photron Ritchey-Chrétien Optical Tube Assembly
INSTRUCTION MANUAL
WARNING!
NEVER USE A TELESCOPE TO LOOK AT THE SUN! Looking at or near the Sun will
cause instant and irreversible damage to your eye. Children should always have
adult supervision while observing
iOptron Corporation | 6E Gill Street | Woburn, MA 01801 | www.iOptron.com
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Table of Contents
Related Manuals for iOptron Photron RC6
Summary of Contents for iOptron Photron RC6
- Page 1 NEVER USE A TELESCOPE TO LOOK AT THE SUN! Looking at or near the Sun will cause instant and irreversible damage to your eye. Children should always have adult supervision while observing iOptron Corporation | 6E Gill Street | Woburn, MA 01801 | www.iOptron.com...
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Page 2: Parts List
The 6" RC features a 2" Crayford focuser equipped with a removable 1.25" adapter. The tension The iOptron RC has a preinstalled dovetail rail for adjustment knob and the drawtube locking knob are mounting the scope quickly and directly onto an on the underside of the focuser, altazimuth or equatorial mount. - Page 3 Stabilizing track Drawtube lock knob Drawtube lock knob Drawtube tension adjustment knob Attachment collar The 8" RC has a 2" linear-bearing Crayford focuser, which has a stabilizing track on the underside of the drawtube that provides extra rigidity for carrying Drawtube tension heavy payloads. The tension adjustment knob is on adjustment knob ...
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Page 4: Use Of Optional Accessories
final focusing for astrophotographic framing by between the optical tube and the focuser to take up slightly loosening the focuser attachment collar unneeded backfocus. (turning it counterclockwise), then rotating the focuser If the focuser drawtube is fully extended and you to the desired position, then retightening the collar. -
Page 5: Cooling The Telescope
more than one rings depends on your equipment. It may be useful to experiment with different combinations during the day before heading out into the field. Choose a target over half a mile away to ensure you are simulating infinity focus. The goal is to reach focus with as little extension of the focuser drawtube as possible, to avoid drawtube flexure. -
Page 6: Aligning Finderscope
Remove any extension rings and attach the The fans can also be powered by other 12V DC focuser directly to the optical tube. power supply, such as a iOptron PowerWeight Set up the telescope in a well-lit room with the (#8128) or other portable battery. - Page 7 Secondary Mirror Adjustment should be reasonably tight so the secondary mirror won’t shift while the scope is in use. If the view looks something like the following figure with the dot of the collimation eyepiece NOT centered Always start by loosening one screw. Adjust the in the secondary center ring, the secondary mirror screws only very slightly—by no more than 1/8 turn at needs be adjusted.
- Page 8 Insert an eyepiece directly into the focuser drawtube by using the 1.25” ring adapter. The eyepiece should provide moderate to high magnification. DO NOT use a star diagonal. An ideal target is a star close to the zenith (straight overhead) rather than at the horizon to minimize atmospheric distortions.
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Page 9: Specifications
Specifications: Photron RC6 RC8 RC10 Optical design Ritchey‐Chretien Ritchey‐Chretien Ritchey‐Chretien optical type Hyperbolic Hyperbolic Hyperbolic Optical diameter 150mm 200mm 250mm Focal length 1370mm 1624mm 2000mm Focal ratio f/9 f/8 f/8 Resolving power 0.76 arcsec 0.58 arcsec 0.46 arcsec Limiting stellar magnitude 13.6 14.2 14.7 Lowest useful magnification 22X 29X 36X ...