iOptron Photron 250 RC f/8 CEM60 Telescope Package

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Accessories Added

  • Photron 10-inch Ritchey-Chretien Astrograph Package 
  • Center-balanced equatorial mount CEM60
  • iOptron Tri-pier
  • ASCOM Electric focuser



iOptron Photron 250 RC f/8 CEM60 Telescope Package

The Photron 250 Package by iOptron is a 250 mm (10-inch) Ritchey-Chretien astrograph telescope, an OTA, mount, and tripod which were designed for today's astroimager for a complete imaging and visual system.

Introducing Photron, Ritchey-Chretien (RC) telescope system by iOptron: Photron instruments are built to facilitate today's astroimager in capturing the data necessary to create spectacular edge to edge sharp astroimages. To achieve this goal, The RC telescopes incorporate low-thermal expansion quartz primary and secondary mirrors with 99-percent reflective dielectric coatings. The RC optical design delivers coma, spherical , and chromatic aberration-free results; perfect for color and monochrome imaging. A fixed position primary mirror eliminates the image shift that occurs when focusing some telescope designs. The steel tube interior is equipped with 10 knife edge baffles to diminish contrast-reducing stray light from bouncing and improving the instrument for both visual and imaging uses.

There are three extension rings provided for a flex-free solid extension as a means to take-up any unneeded back focus. 

Mounting Plates: The 250 mm model includes both top and bottom Losmandy-style dovetail plates adding rigidity to the tube while providing attachment points for the mount and other accessories. The 200 mm model includes 1 Losmandy-style and 1 Vixen-style mounting plates. The 150 mm model includes 1 Vixen-style mounting plate.

The smooth dual-speed 2-inch linear bearing Crawford focuser comes complete with an ASCOM compliant electronic focus control, delivering disturbance-free focusing.


This Photron 250 system is packaged with an iOptron patented CEM60 Central-Balanced Equatorial mount, a sturdy iOptron tri-pier, and an iOptron ASCOM compliant electric focuser for disturbance free operation.


OPT Product Number: IO-12250 


RA Worm Wheel146mm Diameter 228 Teeth
Aperture254 mm (10")
Back Focus288mm
Camera/Eyepiece Connection2" Nosepiece
Database359000 Objects
Dawes Limit0.46 arcseconds
DEC Worm Wheel146mm Diameter 228 Teeth
Drive TypeStepper motor
Focal Length2000 mm
Focal Ratiof/7.9
Free ShippingYes
Glass TypeQuartz
Head DesignGerman Equatorial
Hightest Magnification508x
Instrument Capacity60 lbs
Latitude Range0~70 Degrees
Light Gathering Power1317x
Limiting Magnitude15.8
Optical DesignRitchey Chretien
PortsSerial Port
Power Consumption12V 2A
Secondary Obstruction110mm
Slew Speed3.75°/sec
Telescope ConnectionDual Vixen & Losmandy
Telescope SeriesPhotron/ Ritchey Chretien Telescopes
Tracking Accuracy±5 Arcseconds
Tube Diameter294mm
Tube Length650mm
Tube Weight35 lbs


    Package Includes:
  • iOptron 250 mm (10-inch) OTA, RC10, with two 25 mm extension rings, one 50 mm focus extension ring, a 1.25-inch acc. adapter, and two Losmandy-style mounting plates (#IO-6113)
  • Finderscope: 8x50 mm with bracket (#IO-6152)
  • 1.25-Inch Diagonal, dielectric coated mirror (#IO-6231)
  • 1.25-Inch Eyepiece, 25 mm Plossl (#IO-6241-25)
  • CEM60 mount (#IO-7200, with Counterweight (No.1))
  • Tri-pier (#IO-8034)
  • Counterweight (No.2), 11-pounds (#IO-8027)
  • Electric focuser, for RC scope (#IO-8451)




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