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Focal Reducers & Correctors

Items 1 - 25 of 77
Celestron f/6.3 Focal Reducer/Corrector

Celestron f/6.3 Focal Reducer & Corrector - 94175

SKU: CEL-94175
  • For all Schmidt-Cassegrain telescopes; not for EdgeHD models
  • This focal reducer from Celestron reduces the effective focal length by 0.63X
  • Enjoy the wider field of view & faster exposure times at f/6.3 with f/10 telescopes
  • f/11 telescopes, such as the C14 will perform at f/7
  • The Celestron f/6.3 Reducer has four fully-multicoated elements
  • Reduce your exposure times by a factor of 3!
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$154.95

Celestron 0.7X Reducer Lens for 1400 EdgeHD - 94240

SKU: CEL-94240
  • Reducer for Celestron 14" EdgeHD telescopes
  • Shortens inherent focal length from f/11 to f/7.7
  • This reducer cuts your exposure times in half & increases field of view by 43%!
  • Threads directly onto 3.25" rear cell threads
  • Five-element design preserves EdgeHD flat field performance
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$692.95
Celestron 0.7x Reducer Lens for EdgeHD 1100

Celestron Reducer Lens .7x EdgeHD 1100 94241

SKU: CEL-94241
  • Reducer for Celestron 11" EdgeHD telescopes
  • Shortens inherent focal length from f/10 to f/7
  • This reducer cuts your exposure times in half & increases field of view by 43%!
  • Threads directly onto 3.25" rear cell threads
  • Five-element design preserves EdgeHD flat field performance
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$692.95
Celestron 0.7x Focal Reducer for EdgeHD 800

Celestron .7x Focal Reducer for 8" EdgeHD Telescopes - 94242

SKU: CEL-94242
  • Reducer for Celestron 8" EdgeHD telescopes
  • Shortens inherent focal length from f/10 to f/7
  • This reducer cuts your exposure times in half & increases FOV by 43%!
  • Threads directly onto the rear cell of the 8" HD
  • 105 mm of back focus & optimized for APS-C sensors
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$351.95
Baader Planetarium Alan Gee Mark II Telecompressor

Baader Planetarium Alan Gee Mark II Telecompressor - AGII

SKU: BAD-AGII
  • Reduces f/10 SCT's to f/5.9 and produces a sharp, wide, flat field!
  • 35 mm clear optical aperture
  • Designed by Astro-Physics' Roland Christen
  • Air-spaced doublet with 7-layer anti-reflection multi-coatings
  • Four pieces consist of lens cell, two 19 mm spacers (removable) & flanged end ring
  • For f/10 & slower Schmidt-Cassegrain's. Will not work with Meade f/6.3 models
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$297.00

Tele Vue Focal Reducer Body Adapter for 2" Focuser - RAD-1074

SKU: TLV-RAD-1074
  • This adapter makes TeleVue focal reducers compatible with standard 2" focusers.
  • Enables the use of Tele Vue 0.8x Reducers (NPR-1073 or RFL-4087) on NP101, NP127, or TV102 telescopes.
  • Not suitable for use with NP101, NP127, and TV102 "is" models.
$54.95

Tele Vue 0.8x Focal Reducer/Flattener for Tele Vue 102 Scope - RFL-4087

SKU: TLV-RFL-4087
  • TeleVue combination Focal Reducer and Field Flattener for 102 mm telescopes.
  • Provides a 0.8x effective focal length reduction.
  • Flattens the TV102 telescope's image field in order to optimize imaging results.
  • Designed to fit standard 2" focusers as well as threaded TV102iis accessories.
  • For CCD camera use, the CWT-1070, STL-1071, or TRG-1072 adapter is required to enable connection.
$315.00

Tele Vue 0.8x Focal Reducer/Flattener for Tele Vue 85/Pronto - TRF-2008

SKU: TLV-TRF-2008
  • This Tele Vue 0.8x Focal Reducer and Field Flattener works in conjunction with TV-85 and Pronto telescopes.
  • Transforms the TV-85 into a 480 mm f/5.6 system, and the Pronto into a 380 mm f/5.4 system.
  • Flattens the field in addition to reducing the effective focal length for fast, superior quality astro-imaging operations.
  • Fully multi-coated with 3 elements, this unit fits directly into 2” focusers.
  • Accepts standard T-rings for 35 mm cameras.
$281.95

Tele Vue 0.8x Focal Reducer Lens Body for Tele Vue NP Scopes - NPR-1073

SKU: TLV-NPR-1073
  • Tele Vue Focal Reducer for NP and NPis series telescopes.
  • Reduces the effective focal length of Nagler-Petzval refractors by a factor of 0.8x.
  • Best suited for typical 55 mm back focal length SLR camera bodies that accept T-rings.
  • DSLR camera use requires a 2.4” adapter, while CCD camera use requires the proper spacing needed to maintain 55 mm of back focus.
$279.95
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$1,195.00
Stellarvue 0.74x Focal Reducer and Field Flattener for SVX80T-3SV Telescopes

Stellarvue .74 Focal Reducer/Flattener for SVX080T-3SV Refractor - SFFR80T-3SV

SKU: STV-SFFR80T-3SV
  • Reduce the effective focal length and flatten the field of your Stellarvue 80mm SVX Refractor!
  • Only for SVX080T with 3" Stellarvue focuser
  • Reduction is .74X, taking the focal ratio from f/6 to f/4.5
  • Threads directly into the focuser for stability
  • 48mm male threads on the camera side accept "wide" DSLR T-rings or cameras with 48mm threads
  • 55 mm of back focus
$395.00

Apertura 0.5X Focal Reducer - 2" - A-FR2

SKU: APT-A-FR2
  • Decrease the focal length of your telescope by half with this 2" 0.5x Focal Reducer.
  • Provides a wide field while minimizing exposure times for astrophotography.
  • This 2" 0.5x Focal Reducer contains fully multi-coated optics with two-element optical design.
  • Black anodized lens cell curtails reflections from errant light.
  • Offers considerable flexibility for set up modification.
$54.95
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$395.00
Apertura 0.5x Focal Reducer - 1.25"

Apertura 0.5x Focal Reducer - 1.25" - A-FR1

SKU: APT-A-FR1
  • Inexpensive 1.25" Focal Reducer by Apertura
  • 0.5X focal ratio reduction enables a wider field of view
  • Fully multi-coated doublet in black anodized cell
  • Decreases necessary exposure time
$29.95
Sky-Watcher Evostar 80 Reducer/Corrector to Evostar 72ED Adapter

Sky-Watcher Evostar 72ED Reducer/Corrector Adapter - S20210

SKU: SKY-S20210
  • Allows the Sky-Watcher Evostar 80 refractor 0.85x reducer/corrector to be used with the Evostar 72 refractor
  • Shortens the focal length and focal ratio to enable a faster instrument for astrophotography
  • Virtually eliminated distortion at the edge of the field
  • Reducer/corrector sold separately
$25.00
Takahashi 0.72x FS-60CB Reducer-C
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$630.00

Takahashi 0.66X FC-35 Focal Reducer - TKA19580

SKU: TAK-TKA19580
  • Reducer for Takahashi FC-100DZ, FC-100DF, FC-125, FS-102, FS-128, and FS-152 telescope models
  • Shortens focal length by 0.66x
  • Produces a 44 mm image circle
  • Increases the speed of your optical system for optimized astrophotography
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$1,010.00
Starizona ApexED 0.65x Focal Reducer and Field Flattener - "L" Version

Starizona Apex ED 0.65x Focal Reducer & Field Flattener - Long Version - APEXED-L

SKU: STZ-APEXED-L
  • Reducer/Flattener for 500 mm+ focal length refractor telescopes and all RC and ACF telescopes
  • This Apex ED Focal Reducer from Starizona reduces the effective focal length by 0.65x
  • Shortens f/5.5 apochromatic refractors to f/3.6, and f/9 RC telescopes to f/5.9
  • Provides a 1.5x wider field of view and 2.4x shorter exposure times
  • Five-Element design ensures no compromise in optical performance
  • Corrects for apo refractor field curvature and astigmatism
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$449.00
Starizona ApexED 0.65x Focal Reducer and Field Flattener - "S" Version

Starizona Apex ED 0.65x Focal Reducer & Field Flattener - Short Version - APEXED-S

SKU: STZ-APEXED-S
  • Reducer/Flattener for 300-500 mm focal length telescopes including 60-80 mm aperture apo refractor telescopes
  • This Apex ED Focal Reducer from Starizona reduces the effective focal length by 0.65x
  • Shortens f/5.5 apochromatic refractors to f/3.6, and f/9 RC telescopes to f/5.9
  • Provides a 1.5x wider field of view and 2.4x shorter exposure times
  • Five-Element design ensures no compromise in optical performance
  • Corrects for apo refractor field curvature and astigmatism
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$449.00
Lunt Solar Systems 0.8x reducer/field flattener for 80MT, 100MT, and 130MT telescopes. For nighttime astrophotographic imaging.

Lunt 0.8x Reducer/Field Flattener for Lunt Modular Telescopes - CAA-RF

SKU: LUN-CAA-RF
  • Optical Modifier or Adapter: Reducer/Field Flattener
  • Magnification: 0.8x
  • Compatible with most cameras, focuser types, and T-thread adapters
  • For use with f/7 telescopes between 80 mm and 130 mm
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$299.00
Takahashi 0.73x Focal Reducer for FSQ-85ED and FSQ-106ED Refractor Telescopes

Takahashi Reducer-QE 0.73x for FSQ-85ED and FSQ-106ED Refractors - TKA36580

SKU: TAK-TKA36580
  • This Focal Reducer from Takahashi decreases your telescope's focal length by 0.73x
  • Enhances FSQ-85ED and FSQ-106ED refractor systems for astrophotography
  • Image Circle Diameter: 44 mm
  • Optimally suited for larger imaging chips
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$750.00
Sky-Watcher 0.77x Reducer/Field Flattener for Esprit 120ED

Sky-Watcher 0.77x Reducer/Field Flattener for Esprit 120ED - S20209

SKU: SKY-S20209
  • Drops the focal ratio from the native f/7 (840 mm) to f/5.4 (647 mm)
  • Reduces exposure time by 65% compared to the native f/7
  • Back-focus: 95 mm (55 mm with spacer and M48 ring installed)
  • Mount filters with the built-in 2" filter cell
$380.00
Sky-Watcher 0.77x Reducer/Field Flattener for Esprit 120ED

Sky-Watcher 0.77x Reducer/Field Flattener for Evostar 150DX - S20208

SKU: SKY-S20208
  • Reduces the focal ratio from f/8 (1200 mm) to f/6.2 (930 mm)
  • Reduces exposure time by 66% compared to the Evostar 150DX's native f/8
  • Back-focus: 89 mm (55 mm with spacer and M48 ring installed)
  • Mount filters with the built-in 2" filter cell
$380.00
Sky-Watcher 0.85x Focal Reducer/Field Flattener for EvoStar 72ED Refractor Telescope

Sky-Watcher 0.85x Reducer/Flattener for EvoStar 72ED - S20212

SKU: SKY-S20212
  • Sky-Watcher Reducer/Flattener compatible with EvoStar 72ED refractors
  • Reduces the EvoStar 72ED's original focal ratio by 0.85x from f/5.8 to f/4.93
  • Supplies 55 mm of back focus
  • Provides a 38% reduction in exposure time
  • Recommended for use with APS-C and smaller sensors, but works with full frame sensors as well
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$325.00
$27.99

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!