Product Details

• Description
• Specifications
• Included Items
• Reviews

• 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 

• specifications

  RA Worm Wheel	146mm Diameter 228 Teeth
  Aperture	254 mm (10")
  Back Focus	288mm
  Camera/Eyepiece Connection	2" Nosepiece
  Computerized	Computerized
  Database	359000 Objects
  Dawes Limit	0.46 arcseconds
  DEC Worm Wheel	146mm Diameter 228 Teeth
  Drive Type	Stepper motor
  Focal Length	2000 mm
  Focal Ratio	f/7.9
  Free Shipping	Yes
  Glass Type	Quartz
  Head Design	Equatorial
  Highest Magnification	508x
  Instrument Capacity	60 lbs
  Latitude Range	0~70 Degrees
  Light Gathering Power	1317x
  Limiting Magnitude	15.8
  Optical Design	Ritchey Chretien
  PEC	Yes
  Ports	Serial Port
  Ports	4
  Power Consumption	12V 2A
  Reflectivity	96%
  Secondary Obstruction	110mm
  Slew Speed	3.75°/sec
  Telescope Connection	Dual Vixen & Losmandy
  Tracking Accuracy	±5 Arcseconds
  Tube Diameter	294mm
  Tube Length	650mm
  Tube Weight	35 lbs

• included items

  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)