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The World's Finest Line of Ritchey-Chretien Telescopes

RC10-50G ] RC12.5-50G ] RC14.5-HP75G ] RC16-75F ] RC20-100F ] [ RC20-140F ] RC20-140FT ] RC24-140F ] RC32-190F ]


PC-TCS Controller
PC-TCS is a Personal Computer based Telescope Control System designed for use with moderate to large permanently mounted  astronomical telescopes. The software will run on all IBM-class computers.

PC-TCS provides the observer with a highly flexible battery of motion control functions handsomely matching the demands of astronomical observing. As much as possible, system complexity is minimized by the use of a "Menu Driven" user interface that, in most cases, requires only single keystrokes to make the telescope perform complex tasks.
Learn more about PC-TCS>>

And all PC-TCS-controlled OGS telescope systems will script with the integration of this ASCOM compliant operating system. 
Learn more about ASCOM>> 


Optical System
Primary Diameter 20.0"
Specular Precision 1/25, or better, wave front RMS  
Mirror Substrate Near-zero expansion ceramic
Focal Ratio f/8.1
Image Scale 49.9 arc sec/mm
Tube Diameter 24.5"
Tube Length 54"
Tube Cooling 12 V DC fans
Material AL (Mg; XZe Carbon Fiber© available) 
Focuser Tube I.D. 2.7"
Available Back Focus 10.5"
Secondary Diameter 7.25"
Sec. Focus Range (electric standard)  12"
Focus Stabilization, w. Al tube Invar 36


OGS-140 Fork
Aux. Instrument Cap. 175 lbs.
Tracking Precision <1 arc sec RMS (after modeling)
Pointing Precision <30 arc sec RMS (after modeling)
R. A. Drive 18" 360 tooth worm gear & ball bearing worm
DEC Drive 15" 360 tooth worm gear & ball bearing worm
Shafts 6.0" Ř (140mm at R. A.  bearing ends; 75mm at DEC ends)
Motors Five-phase nano-step or servo
Axis Intersection 72" from base of pier (at 40°)
Fork Swing Clearance 21"
Weight (system) 925 lbs.
R. A. Counterweights 2 x 5 lbs.
Pier 32" high, typically (custom heights available)
Fasteners 18-8 stainless steel
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(Prices and specifications subject to change w/o notice.)