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You Still Have Time - Holiday Shipping Schedule

ACF, EdgeHD & RC Telescopes

Items 1 - 25 of 32

Celestron EdgeHD 8 OTA - 8" f/10 Aplanatic SCT OTA - CGE Dovetail - 91030-XLT

SKU: CEL-91030-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,349.00

8" Celestron Edge HD 8 SCT OTA - CG-5 Dovetail - 91031-XLT

SKU: CEL-91031-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,349.00

Celestron EdgeHD 925 OTA - 9.25" f/10 HD Aplanatic SCT Optical Tube Assembly - CGE Dovetail - 91040-XLT

SKU: CEL-91040-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 235mm (9.25")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,399.00

Celestron EdgeHD 11 OTA - 11" f/10 Aplanatic SCT OTA - CGE Dovetail - 91050-XLT

SKU: CEL-91050-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 279.4mm (11")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$3,499.00

Celestron EdgeHD 14 OTA - 14" f/11 Aplanatic SCT OTA - CGE Dovetail - 91060-XLT

SKU: CEL-91060-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 356mm (14.02")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$5,999.00

Meade 14" f/10 LX200 ACF OTA - 1410-60-01

SKU: MEA-1410-60-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 355.6mm (14")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$4,949.00

Meade 16" f/10 LX200 ACF OTA - 1610-60-01

SKU: MEA-1610-60-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 406mm (16")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$6,849.00

Meade 8" f/10 LX200 ACF OTA - 0810-60-01

SKU: MEA-0810-60-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,199.00

Meade 10" f/10 LX200 ACF OTA - 1010-60-01

SKU: MEA-1010-60-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 254mm (10")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,699.00

Meade 12" f/10 LX200 ACF OTA - 1210-60-01

SKU: MEA-1210-60-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 305mm (12")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,899.00

GSO 12" f/8 Ritchey-Chretien Optical Tube - Truss Tube OTA - 12RCT

SKU: GSO-12RCT
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 305mm (12")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$4,295.00
GSO 10" Truss Tube RC

GSO 10" f/8 Ritchey-Chretien Optical Tube - Truss Tube OTA - 10RCT

SKU: GSO-10RCT
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 254mm (10")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,995.00 $2,545.75
GSO 12" f/8 RC from Side

GSO 14" f/8 Ritchey-Chretien Optical Tube - Truss Tube OTA - 14RCT

SKU: GSO-14RCT
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 355.6mm (14")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$5,795.00 $4,925.75
GSO 12" f/8 RC

GSO 16" f/8 Ritchey-Chretien Optical Tube - Truss Tube OTA - 16RCT

SKU: GSO-16RCT
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 406mm (16")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$6,995.00 $5,945.75
GSO 8" f/8 RC Ritchey-Chretien OTA with Dual Dovetails

GSO 8" f/8 Ritchey-Chretien Optical Tube - Carbon Fiber OTA - 8RC

SKU: GSO-8RC
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,395.00 $1,185.75

GSO 6" f/9 Ritchey-Chretien Optical Tube - Steel OTA - 6RC

SKU: GSO-6RC
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 152.4mm (6")
  • Focal Ratio: f/9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$399.00 $339.15

Meade 10" f/8 ACF OTA with UHTC - 1008-80-01

SKU: MEA-1008-80-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 254mm (10")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,299.00

Meade 12" f/8 ACF OTA with UHTC - 1208-80-01

SKU: MEA-1208-80-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 305mm (12")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$3,359.00

Meade 14" f/8 ACF OTA with UHTC - 1408-80-01

SKU: MEA-1408-80-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 355.6mm (14")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$5,059.00

Meade 16" f/8 ACF OTA with UHTC - 1608-80-01

SKU: MEA-1608-80-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 406mm (16")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$7,499.00
GSO 8" f/8 Ritchey-Chretien - Steel OTA

GSO 8" f/8 Ritchey-Chretien Optical Tube - Steel OTA - 8RCS

SKU: GSO-8RCS
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$899.00 $764.15
iOptron Photron RC10 Optical Tube Assembly

iOptron 10" Photron RC Telescope OTA - 6113

SKU: IOP-6113
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 250mm (9.84")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,495.00
iOptron Photron 200 RC Telescope OTA

iOptron 8" Photron RC Telescope OTA - 6112

SKU: IOP-6112
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 200mm (7.87")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$895.00
iOptron Photron 150 Ritchey-Chretien Telescope OTA

iOptron 6" Photron RC Telescope OTA - 6111

SKU: IOP-6111
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 150mm (5.9")
  • Focal Ratio: f/9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$399.00

iOptron 10" Photron Truss Tube Ritchey-Chretien Telescope - 6114

SKU: IOP-6114
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 254mm (10")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,995.00

Twenty years ago, telescopes designs like the Ritchey-Chretien, which are meant for astrophotography and not for visual use, were purchased by professionals, universities and advanced amateur astronomers with pretty deep wallets! However, as digital imaging became more popular and the price of CCD sensors came down, more amateur astronomers entered the world of astro-imaging and of course, they were on the look-out for optical systems that would work together with their cameras to produce the best images. Before long, several companies released their version of a telescope that was optimized for imaging. The most popular designs include Celestron's EdgeHD and Meade's ACF, or Advanced Coma-Free telescopes.

True Ritchey-Chretien telescopes, also known as RC telescopes, have a folded optical design like a Schmidt- or Maksutov-Cassegrain but do not have a corrector plate. The optics consist of a primary and secondary hyperbolic mirror to eliminate coma and spherical aberrations. Removing these aberrations allows astronomers to accurately take scientific measurements regarding a star's location. Other optical issues inherrent in the Ritchey-Chretien design, such as astigmatism and field curvature can be greatly reduced with the addition of a field flattener, allowing serious amateur astronomers to image with larger sensors and still have great star images across the field of view.

Variations on this design include the Celestron EdgeHD, a telescope with an optimized aplanatic flat-field Schmidt-Cassegrain optical system, and the Meade ACF, or Advanced Coma-Free telescope. Both telescope manufacturers advertise a much flattener field than that of a standard Schmidt-Cassegrain; a real boon to amateur astronomers who want to produce beautiful images of celestial objects. A flattened field yields star images that have a pleasingly round shape all the way to the edge of the field of view, whether you are using a large imaging sensor or are looking through a super wide angle eyepiece.

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