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Focal Reducers & Correctors

11 Items
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Baader Planetarium 2" Mark III Multi Purpose Coma Corrector - MPCC

  • Baader MPCC Mark III 2" Coma Corrector for f/4 - f/6 Newtonians
  • This Coma Corrector does not require additional back focus & does not increase magnification
  • Delivers 12 micron stars across a full 35 mm frame size
  • Telescope side is 2" slip-fit, Camera side is 48mm
  • Except a T-ring to match your DSLR, no other accessories are needed
  • Works with Baader Astro T-2 System components for CCD/CMOS cameras
Baader Rowe Triplet Coma Corrector for Newtonian Reflectors

Baader Planetarium Rowe Triplet Coma Corrector for Newtonians - RCC-I

  • Rowe Coma Corrector for f/3.5 to f/6 Newtonian's with long working distance
  • Image ratio is 1 : 1
  • Focus position is 91.5 mm from T2 thread, 94.5 mm from M48 thread
  • Telescope side is 2" with M48 filter thread
  • Camera side is M42 and M48
  • Triplet design with Baader phantom coatings on each air-to-glass surface

Tele Vue Visual Imaging Paracorr Type-2 - VIP-2010

  • This TeleVue Visual Imaging Paracorr removes coma from the resulting image when performing astrophotography with Newtonian reflector or Dobsonian telescopes.
  • Drastically enhances stars at the edge of the field.
  • The TeleVue Paracorr optical assembly separates from the Tunable Top to enable use with SLR and CCD cameras.
  • Optimally suited for APS-sized formats measuring 27 mm in diameter used with extremely fast f/3 optical systems.
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Tele Vue 3" Big Paracorr Type-2 - VIP-3010

  • Designed to be compatible with 3" focusers, the Tele Vue BIG Paracorr also works for both visual and imaging applications with the appropriate accessories.
  • The Parabola Corrector, or Paracorr, eliminates coma for significally enhanced edge-of-field stars that match the quality of stars elsewhere in the image field.
  • Best suited for up to 52 mm diagonal CCD sensor formats with Newtonian reflector optical systems as fast as f/3.
  • With 80 mm of back focus, the 3" BIG Paracorr permits the inclusion of additional accessories.
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Explore Scientific 2" HR Coma Corrector - HRCC02-00

  • For Newtonian telescopes with 2" focusers
  • Minimize inherent coma in Newtonians with this Coma Corrector from Explore Scientific
  • 2" Barrel slides into focuser on the telescope side
  • For visual use, use 2" eyepieces directly or insert a 2" to 1.25" adapter (sold separately) for 1.25" eyepieces
  • For photography, both a M42 and M48 threaded adapter are included, allowing you to use a standard or wide T-ring
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Sky-Watcher Quattro Coma Corrector - S20204

SKU: SKY-S20204
  • Sky-Watcher Coma Corrector with M48 threads designed specifically for f/4 Quattro Imaging Newtonians.
  • This optical correction device incorporates FPL51 and Schott glass and will give stars located at the far reaches of the view field an appearance enhancement.
  • Correcting for coma, an off-axis aberration commonplace with classic Newtonian reflector telescopes, greatly enhances wide-field astro-imaging performance.
  • Adding this Sky-Watcher Quattro Coma Corrector necessitates 55 mm of back focus.
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Baader 2" Multi-Purpose Coma Corrector - Visual and Photographic Edition

Baader 2" Multi-Purpose Coma Corrector - Mk III - Visual and Photographic Edition - MPCC-SET2

  • The Baader Planetarium Multi-Purpose Coma Corrector (MPCC) has been expressly designed for use with f/4 to f/6 focal ratio Newtonian reflectors.
  • This Visual and Photographic version comes with a Baader 1.25” T-2 Focusing Eyepiece Holder and VariLock 29 T2 Variable Extension Tube.
  • Delivers 12 micron stars across a full 35 mm frame size.
  • 2” slip-fit telescope side and 48 mm camera side.
  • The only required accessory is a T-ring that corresponds with your DSLR camera.
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Starizona SCT Coma Corrector LF - Large Format C11/C14 - SCTCORR-LF

  • Coma Corrector designed for full-frame 35mm format sensors
  • Works with Celestron 11" & 14" SCT's with 3.29" rear cell threads
  • The Starizona Large Format Coma Corrector reduces C14 to f/7.5 and C11 to f/7.2
  • Back focus is a very generous 132mm
  • Image circle is 42 mm
2" Photo & Visual Coma Corrector for Newtonian Telescopes

Apertura 2" Photo & Visual Coma Corrector for Newtonian Telescopes - A-COMA

  • Significantly reduce the coma and field curvature on your Newtonian
  • Optimized for f/4.5 Newtonian telescopes
  • Works with f/3 to f/6 Newtonian's
  • Magnification factor of 1.1X, accepts 2" filters
  • Great for both visual and photographic use
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    Starizona SCT Corrector 3 - 0.63x Focal Reducer & Coma Corrector

    Starizona SCT Corrector 3 - 0.63x Reducer and Coma Corrector - SCTCORR-3

    • Reducer and Coma Corrector for Meade and Celestron Schmidt-Cassegrain telescopes.
    • Provides a 0.63x reduction for taking an f/10 SCT down to f/6.3 for instance.
    • Relative image circle of 27 mm
    • The back focus is 90.3 mm from base of camera threads on the corrector
    • The Starizona SCT Corrector II has a 2" barrel and is threaded to accept 48 mm filters
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    A focal reducer is an excellent tool to help you achieve the magnification you need, and at High Point Scientific, we provide you with the best selection. A focal reducer, also known as a telecompressor, effectively reduces the focal length of your OTA, resulting in a wider field of view. They are also a great addition to any astrophotography set up as it can cut your exposure time down considerably. Enjoy wide views of large objects such as nebulae with a faster lens speed!

    We also have a wide variety of correctors designed for flat-field correction or coma correction. A field corrector is vital for astro-imaging with certain telescope designs because it optimizes edge-of-field image quality. When observing with a Newtonian, coma correctors help reduce comatic aberration or coma. Without a coma corrector, Newtonians may show stars with comet-like tails. Add a coma corrector to your set up to make sure you view celestial objects with pinpoint definition. Also, be sure to check out our extension tubes and adapters to make sure you achieve the necessary back focus for your set up.

    You will find focal reducers and correctors from all of the latest brands, including Celestron, Tele Vue, Baader, Takahashi, Sky-Watcher, and many more! Our experts have hand-selected each accessory to give you a quality selection of great products. We are ready to help you get the best views out of your telescope!

    High Point Scientific is rated 4.9/5 based on 1347 reviews