The iOptron Photron™ RC12-Truss offers high-resolution optical performance in a versatile, mid-sized astrograph that’s ideal for serious imagers working with medium-to-large sensor formats. With a 12" (305mm) aperture, thermally stable quartz optics, and a lightweight carbon fiber truss design, the RC12 balances portability and power, making it a superb choice for remote imaging rigs or mobile dark-sky setups.
Designed for precision imaging, the RC12-Truss delivers coma-free, color-correct views across the full field—without lenses, correctors, or compromise.
Quartz Optics and Fixed Primary
At the heart of the RC12 is a true Ritchey-Chrétien optical system with hyperbolic primary and secondary mirrors, both made from low-expansion quartz and coated with enhanced dielectric coatings for excellent contrast and light throughput. The fixed-position primary mirror ensures that focus remains consistent with no image shift during long imaging sequences—critical when working with sensitive guiding or autofocus routines.
The telescope's focal length of 2436mm at f/8 offers excellent reach for galaxies, globular clusters, and planetary nebulae, while still offering a wide enough field for larger targets with full-frame and APS-C sensors.
Carbon Fiber Truss Tube with Stability in Mind
The carbon fiber truss tube ensures excellent rigidity with minimal weight and thermal expansion. The open design allows for fast cooldown and helps preserve collimation through long observing sessions or when changing orientation on the mount. This structure also reduces dew formation and wind drag, making it a solid performer in variable conditions.
Crayford Focuser and iEAF Support
The RC12 includes a robust 3" linear bearing Crayford focuser with dual-speed (10:1) adjustment, designed to hold heavy imaging trains without flexure or backlash. For automation or remote control, the focuser is fully compatible with iOptron’s iEAF motorized electronic focuser system (sold separately), allowing integration with ASCOM-compliant software and automated focus routines.
The OTA includes three threaded extension rings (two 1" and one 2") to help reach optimal back focus spacing without compromising mechanical integrity.
Cooling System for Quick Temperature Equalization
Three integrated cooling fans at the rear of the primary mirror cell help bring the system to ambient temperature quickly—essential for achieving sharp star images as the night cools. A battery holder is included to power the fans in the field.
Specifications
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Aperture: 12" (305mm)
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Focal Length: 2436mm
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Focal Ratio: f/8
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Optical Design: True Ritchey-Chrétien (hyperbolic mirrors)
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Mirror Material: Quartz with enhanced dielectric coatings
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Tube Design: Carbon fiber truss with metal ends
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Focuser: 3" dual-speed Crayford with linear bearings
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Focuser Compatibility: iEAF (sold separately)
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Extension Rings: 2x 1" (25.4mm), 1x 2" (50.8mm), included
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Cooling Fans: Three rear-mounted fans with battery pack
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Tube Length: 36.3" (922mm)
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OTA Weight: ~61 lbs
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Mounting: Dual Losmandy-style dovetail bars (top and bottom)
Included Accessories
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RC12 Truss Tube OTA
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3" linear bearing Crayford focuser
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2x 1" and 1x 2" threaded extension rings
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Rear cell fan assembly with battery holder
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Primary and secondary mirror covers
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Losmandy dovetail bars (top and bottom)
Observing Tip
The RC12 hits a sweet spot between aperture, weight, and portability. It’s well within the carrying capacity of mounts like the CEM70 or CEM120, and can comfortably support full-frame astrophotography with minimal vignetting. Add the iEAF for fully automated focus runs and remote imaging flexibility.
Solar Use Warning
Never look at the Sun through this telescope—or any telescope—without the proper solar filter installed. Permanent eye damage or blindness will result. Always use approved filters designed specifically for solar observing.
Package includes
#6115 12" Truss Tube RC OTA only
- OTA w/3" dual-speed Crayford focuser
- 2X 1" (25.4mm), 1X 2" (50.8mm) focus extension rings
- Cooling fan battery holder
- Primary and secondary mirror covers
