Takahashi FRC-300 Flat Field Baker Ritchey Chretien Astrograph

Takahashi FRC-300 Flat Field Baker Ritchey Chretien Astrograph   Discontinued
$23,905.00
Item # TK-TRC0300
  • This Baker Ritchey-Chretien Astrograph design delivers almost 12" in aperture (11.8" - 300mm) with a flat field and 90mm (11.8") image circle.
  • The Takahashi FRC-300 temperature compensated secondary holder insures pinpoint stars during long exposures.
  • Two supplementary lenses eliminate spherical aberration, coma, and even astigmatism.
  • The Takahashi FRC-300 is designed for medium format photography or CCD imagery.
  • Stellar images are less then 10 microns at the edge.
  • Includes tube holder.
Description

Details

Takahashi FRC-300 - 300mm f/7.8 Baker Ritchey Chretien Astrograph

This newest flat field astrograph is designed to produce a flat 90Ø image circle for medium format photography or CCD imagery. This image circle can be used with the largest available CCD cameras for many years to come. The f/7.8 focal ratio enables the imager to produce images of smaller objects with amazing sharpness and contrast.

The pin-point stars 10 microns at the edge and 2348mm focal length produce a field, free of astigmatism or coma, will allow the FRC to resolve star clusters and fine detail in galaxies and nebulae across the entire 90mmØ circle. The temperature compensated secondary holder insures pinpoint stars during long exposures. The dedicated f/5.9 reducer (available separately) produces a 36mmØ flat circle for CCD imaging at this shorter focal length. Price includes built-in temperature compensation device and tube holder.

Takahashi FRC-300 - 300mm f/7.8 Baker Ritchey Chretien Astrograph Features

  • Corrected Flat-Field Ritchey-Chretien Optical System is perfect for CCD or medium-format astrophotography.
  • The 11.8" (300mm) diameter primary and 4.9" (125mm) secondary combine at an effective focal length of 92.4" (2348mm) to provide a f/7.8 focal ratio, yielding a 11.8" (90mm) image circle.
  • With optional reducer the focal length becomes 69.7" (1770mm) and the focal ratio is f/5.9 - yielding a 1.4" (36mm) image circle.
  • The tube diameter is 12.8" (324mm) and the length is 40.6" (1030mm) at a total of 66 lbs. (30kg).
  • Included is a 7X50, 6.3º Finderscope.
Takahashi Product Number: TRC0300

Image shows FRC-300 OTA with an equatorial mount and pier, which is sold separately.
Additional Information

Additional Information

SKU TK-TRC0300
Manufacturer Takahashi
Telescope Series Takahashi BRC/ FRC
Optical Design Ritchey-Chretien
Mount Type None - Optical Tube Only
Warranty 5 Year Warranty
Telescope Aperture 11.8"
Secondary Aperture 125mm
Telescope Focal Length 2348mm
Telescope Focal Ratio f/7.8
Back Distance Not supplied by manufacturer
Image Circle 90mm
Image Across Field Not supplied by manufacturer
Optical Coatings Fully Multi-Coated
Limiting Stellar Magnitude 14.8
Highest Useful Magnification Not supplied by manufacturer
Optical Tube Outer Diameter 12.76"
Length of Optical Tube 40.55"
Optical Tube Weight 66 lbs.
Tube Color or Finish Gloss White
Finder Included 7 x 50 Optical Finder
Eyepiece(s) Included None
Diagonal Included? No - Sold Separately
Dew Shield Included? No, Not Necessary
Dew Shield Outside Diameter Not supplied by manufacturer
OTA Mount Type N/A
Power Adapter Included None - Does Not Require Power
Objects in Database N/A
Alignment Procedure N/A
Counterweights Included SEE CODE 27*** SEE CODE 27***
Mount Weight N/A
Total Telescope Weight 6 lbs.
Tripod Type Included None, Sold Separately
Reviews
Included Items

Included Items

  • Takahashi FRC-300 OTA
  • Tube Holder
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