iOptron Photron 250 RC OTA with Accessories

Product Details

• Description
• Specifications
• Included Items
• Recommended Products
• Reviews

• The Photron 250 RC OTA by iOptron is a 250 mm (10-inch) Ritchey Chretien astrograph telescope OTA designed for today's astroimager for a complete imaging and visual system.

  Introducing Photron, Ritchey Chretien (RC) telescope OTA 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 Crawford focuser.

   

  Note: The diagonal and eyepiece are shown are for illustrative purposes only, but may be purchased separately. 

   

  OPT Product Number: IO-6113

• specifications

  Aperture	250 mm (9.8")
  Back Focus	288mm
  Camera/Eyepiece Connection	2" Nosepiece
  Dawes Limit	0.46 arcseconds
  Focal Length	2000 mm
  Focal Ratio	f/7.9
  Free Shipping	Yes
  Glass Type	Quartz
  Highest Magnification	508x
  Limiting Magnitude	15.8
  Optical Design	Ritchey Chretien
  Reflectivity	96%
  Secondary Obstruction	110mm
  Tube Diameter	294mm
  Tube Length	650mm
  Weight	35.1 lbs

• included items

  • iOptron Photron 250 mm (10-inch) OTA, RC10
  • Two 25 mm extension rings
  • One 50 mm focus extension ring
  • 1.25-inch accessory adapter
  • Two Losmandy-style mounting plates
  • Dual Speed Crayford focuser