iOptron Photron 150mm f/9 Ritchey-Chretien Catadioptric Telescope (OTA Only)

iOptron Photron 150mm f/9 Ritchey-Chretien Catadioptric Telescope (OTA Only)

iOptron Photron 150mm f/9 Ritchey-Chretien Catadioptric Telescope (OTA Only)

B&H # IO6111 MFR # 6111
iOptron Photron 150mm f/9 Ritchey-Chretien Catadioptric Telescope (OTA Only)

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Expected availability: 7-14 business days

Product Highlights

  • 150mm Ritchey-Chretien Catadioptric OTA
  • 1370mm Focal Length, f/9 Focal Ratio
  • Low Thermal-Expansion Quartz Mirrors
  • Dielectric Mirror Coatings
  • Ten Internal Knife-Edge Baffles
  • Precise 10:1 Dual-Speed Crayford Focuser
  • Large 2" Drawtube with 1.25" Reducer
  • Three Back-Focus Extension Rings
  • Long Vixen-Style Dovetail Plate
  • OTA Only - Mount and Tripod Required
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Options: OTA Only

CEM25P GoTo EQ Mount, 2" Tripod

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CEM60 GoTo EQ Mount, Tri-Pier

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OTA Only iEQ45 Pro GoTo EQ Mount, 2" Tripod

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Aperture: 150mm (6"), f/9

150mm (6"), f/9 200mm (8"), f/8

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250mm (10"), f/8

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$0.00 Tax Collected Outside NY and NJ

You Pay: $399.00

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iOptron Photron overview

  • 1Description

Utilizing the same hyperbolic primary and secondary mirror design used in the Hubble Space Telescope, the Keck telescopes, and the ESO Very Large Telescope, the iOptron Photron 150mm f/9 Ritchey-Chretien Catadioptric Telescope is ideally suited for both star-gazing and astrophotography. Its relatively compact size allows it to be used on smaller mounts while delivering views that are free from off-axis comas, or spherical and chromatic aberrations. The low thermal-expansion quartz primary and secondary mirrors are treated with highly-reflective dielectric coatings that, when combined with internal knife-edge baffles, limit distortion as the mirrors heat while limiting stray internal light and maximizing light transmission. All this translates to bright and sharp high-contrast images with accurate color fidelity across the entire distortion-free field of view.

Unlike other catadioptric designs, this RCT has a fixed primary mirror to eliminate the image-shift that is common with conventional configurations that move the mirror forward and back to focus the image. With the primary mirror fixed in-place, iOptron installed a precise two-speed Crayford-style focuser with a 10:1 reducer that allows for fast coarse and precise fine focusing without the backlash that occurs in the more common rack-and-pinion design - essential for astrophotography or splitting objects that are close together, like binary stars. To ensure complete coverage of today's imaging sensors, the focuser has a 2" drawtube and comes with three extension rings to help users achieve the proper back-focus distance. The larger drawtube also allows the use of large eyepieces which generally have longer eye reliefs to make visual observations much more comfortable; and comes with a 1.25" reducer to enable the smaller and more common-sized eyepieces and accessories to be easily used.

Intended for those who have a reliable support system, iOptron offers the RCT here as an OTA-only option. A long Vixen-style dovetail plate is factory-installed to make it compatible with a wide variety of alt-azimuth, equatorial, and GoTo mounts that can carry a minimum payload of at least 12 pound

Optical Tube Assembly
  • 150mm (5.9") clear aperture provides performance while keeping the OTA portable; 67mm secondary mirror
  • 1370mm focal length provides a moderate magnification potential and focal ratio for astrophotography
  • Moderate f/9 focal ratio allows for shorter exposure times for imaging than slower OTAs
  • Ritchey-Chrétien catadioptric design delivers views free from off-axis comas, or spherical and chromatic aberrations
  • Low thermal-expansion quartz primary and secondary mirrors limit distortion as the mirrors heat
  • Highly reflective dielectric mirror coatings transmit more than 99% of incoming light to ensure bright and clear images
  • Ten internal knife-edge baffles diminish stray light, improving contrast for visual and imaging applications
  • Fixed-position primary mirror eliminates image-shift common in other catadioptric designs
  • Resolution: 0.76 arcsec
  • 10:1 dual-speed linear-bearing Crayford focuser allows for fast coarse and precise fine focus without backlash for tack-sharp focusing; with tension-adjustment knob and drawtube lock-knob
  • Large 2" drawtube ensures complete coverage of imaging sensors to eliminate or limit vignetting; and allows the use of larger eyepieces to make viewing easier and more comfortable; with etched scale in inches and millimeters for precise repeatability
  • Factory-installed mounting plate for user-supplied finder
Mounting
  • Optical tube assembly only - mount and tripod required for proper use
  • Long Vixen-style dovetail plate is compatible with the most popular size saddles on alt-az, equatorial, and GoTo mounts
  • Weight: 12 pounds
Included Accessories
Reducer Adapter:
  • 2"-to-1.25" reducer allows the use of the smaller, more common-sized accessories and eyepieces in the larger focuser drawtube
Extension Rings:
  • Three focuser rings allow for increased back-focus distance to ensure the focal plane properly lands on imaging sensors or specialized visual equipment
  • Rings can be used one at a time, or stacked as needed
  • Simple screw-together design requires no tools or permanent modification
  • Includes two (2) 1" tubes and one (1) 2" tube
UPC: 813578010643
In the Box
iOptron Photron 150mm f/9 Ritchey-Chretien Catadioptric Telescope (OTA Only)
  • 2" Extension Ring
  • 2 x 1" Extension Rings
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    iOptron Photron specs

    Optical Design Ritchey-Chretien catadioptric
    Aperture 150mm
    Focal Length 1370mm
    Focal Ratio f/9.1
    Eyepiece Barrel Diameter 2"
    Diagonal None
    Finderscope None
    Tripod None
    Mount Type Vixen-style dovetail plate
    Power Source N/A
    Optical Tube Length 19.1" / 48.5 cm
    Weight 12.0 lb / 5.4 kg

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