Skip to content

Reducers & Correctors

22 Items
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
Free shipping Free shipping
$297.00
 

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
Free shipping Free shipping
$629.95
 
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
Free shipping Free shipping
$629.95
 
Celestron 0.7x Focal Reducer for EdgeHD 800

Celestron .7x Focal Reducer For 8 Edge HD - 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
Free shipping Free shipping
$319.95
 

Meade Series 4000 6.3x Focal Reducer - 07545

SKU: MEA-07545
  • This Meade Series 4000 Focal Reducer cuts telescope focal ratios by a factor of 0.63x, converting f/10 and f/6.3 telescopes into much faster f/6.3 and f/4 instruments respectively.
  • Threads directly onto Schmidt-Cassegrin SCT rear cells.
  • With this Meade Focal Reducer, imaging exposure times are roughly cut in half.
  • Delivers a wider field of view for visual observations.
$99.99 $69.95
 

High Point 2" 0.5X Focal Reducer - FR2

SKU: HPS-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 $43.96
 

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
 
Takahashi CR 0.73X Reducer for Mewlon 250 CRS and FSQ-106EDX4

Takahashi CR 0.73X Reducer - TKA82580

SKU: TAK-TKA82580
  • Reducer for Takahashi Mewlon 250 CRS
  • Also works with the FSQ-106EDX4 & FSQ-85EDX
  • Produces 0.73X reduction of telescope's native focal length
  • 44 mm image circle
$580.00
 

High Point 0.5x Focal Reducer - 1.25" - FR1

SKU: HPS-FR1
  • Decrease the focal length of your telescope by half with this 1.25" 0.5x Focal Reducer.
  • Provides a wide field while minimizing exposure times for astrophotography.
  • This 1.25" 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.
$29.95 $23.96
 
Takahashi 645 Reducer - 0.7X

Takahashi 0.7X 645 Reducer - TKA38580

SKU: TAK-TKA38580
  • Designed for Takahashi FSQ-106EDX4 and FSQ-130ED telescopes, this 645 Reducer lessens the effective focal length by a factor of 0.7x.
  • Converts the FSQ-106EDX4 into a 371 mm f/3.5 system, and the FSQ-130ED into a 455 mm f/3.5 system.
  • Offers a wider field of view while minimizing exposure times for astrophotography.
  • Produces a 70 mm image circle when installed on both scopes.
Free shipping Free shipping
$2,450.00
 
Takahashi f/3 Reducer - 0.6X

Takahashi 0.6X f/3 Reducer - TKA38581

SKU: TAK-TKA38581
  • Takahashi 0.6x Focal Reducer for Takahashi FSQ-106EDX4 and FSQ-130ED telescopes.
  • Reduces the focal ratio of both the FSQ-106EDX4 and FSQ-130ED from f/5 to f/3.
  • Ideally suited for anyone taking astrophotos using large sensor cameras.
  • Produces a 44 mm image circle.
Free shipping Free shipping
$1,640.00
 
Takahashi 35 Reducer for TOA and TSA Refractors

Takahashi 35 Reducer for TOA 130 Refractors - TKA32580A

SKU: TAK-TKA32580A
  • Takahashi TOA-35 Focal Reducer made especially for TOA-130 refractor telescopes.
  • Reduces the effective focal length of TOA-130 refractors by a factor of 0.7x, converting it from 1000 mm f/7.7 to a much faster 698 mm f/5.4 instrument.
  • Generates a 44 mm image circle.
  • Internal optics use ED glass and consist of 4 elements in 3 groups.
Free shipping Free shipping
$1,190.00
 
Takahashi 35 Reducer for TOA-150 Refractors

Takahashi 35 Reducer for TOA-150 or TSA-120 Refractor - TKA32580B

SKU: TAK-TKA32580B
  • Takahashi TOA-35 Focal Reducer designed for TOA-150 and TSA-120 refractor telescopes.
  • This 0.7x Reducer converts the 1100 mm f/7.3 TOA-150B and 900 mm f/7.5 TSA-120 into faster 775 mm f/5.2 and 635 mm f/5.3 optical systems respectively.
  • Generates a 44 mm image circle.
  • Internal optics use ED glass and consist of 4 elements in 3 groups.
Free shipping Free shipping
$1,190.00
 

Orion 0.5x Focal Reducer for StarShoot G3-G4 Imaging Cameras - 1.25" - 52066

SKU: ORI-52066
  • This 0.5x Focal Reducer from Orion expands the imaging area of Orion StarShoot G3 and G4 cameras by a factor of 4.
  • A larger imaging area gives the StarShoot G3 or G4 the ability to capture both wider star fields and some deep sky objects.
  • Dual lens design with fully coated optics.
  • Compatible with both monochrome and color Orion StarShoot G3 and G4 cameras.
  • Made of sturdy anodized aluminum, the Orion 0.5x Focal Reducer cell threads straight into the camera's nosepiece.
$44.99
 

Orion 0.85x Focal Reducer Corrector for ED80 f/7.5 Refractor - 5195

SKU: ORI-5195
  • This Orion 0.85x Focal Reducer & Corrector is made to be used with 80 mm ED APO refractor optical tubes, but is not compatible with the Orion 80 mm EON ED refractor.
  • Features a two-element design with one element consisting of extra-low dispersion ED optical glass.
  • Best suited for photographing the night sky using DSLR cameras that have sensor chips measuring up to 36x24 mm.
  • Reduces the effective focal length of ED80 telescopes by a factor of 0.85x, converting a 600 mm f/7.5 scope into a 510 mm f/6.3 scope for a more expansive field of view.
  • With all air-to-glass surfaces containing multiple layers of coatings, the Orion 0.85x Focal Reducer provides enhanced brightness and contrast.
Free shipping Free shipping
$279.99
 

Orion 0.8X Focal Reducer for Refractors with 2" Focusers - 8894

SKU: ORI-8894
  • Decreasing the effective focal length by a factor of 0.8x allows this Orion Focal Reducer to improve the astrophotography capabilities of refractors by enabling a shorter and faster focal ratio.
  • Any refractor telescope outfitted with a 2" focuser is compatible with the Orion 0.8x Focal Reducer.
  • Gives refractors the ability to achieve a broader field of view, as well as to take significantly less time to capture brilliant photos with great detail.
  • 38 mm clear aperture optics with full multi-coatings are contained within smooth exterior made of machined and anodized aluminum.
  • Back focus requirement is 55 mm.
$139.99
 
Baader SolarSpectrum 0.7x TeleCompressor - 2"

Baader 2" SolarSpectrum 0.7x TeleCompressor - CMPRSR

SKU: BAD-CMPRSR
  • This Baader Planetarium Telecompressor mounts directly to the 2" SolarSpectrum H-Alpha filter for a 0.7x focal length reduction of a telecentric system.
  • Working distance to the camera's sensor measures 110 mm long.
  • 2" male threads on both sides enable attachment to the Baader Universal Flange Adapter included with the SolarSpectrum H-Alpha filter.
  • Telescompressors allow you to make minor adjustments to the focal length when viewing conditions are less than ideal, as well as increase the size of the field for photographic or webcam applications.
Free shipping Free shipping
$319.00
 
Baader Planetarium Solar Spectrum 0.4x Telecompressor - 2"

Baader 2" SolarSpectrum 0.4x Research Grade Telecompressor - CMPRSR2

SKU: BAD-CMPRSR2
  • With a 46 mm clear aperture throughout, this Research Grade Baader Planetarium 0.4x Telecompressor is optimally suited for SolarSpectrum RG46 H-Alpha filters in spite of their size.
  • Attaching directly to the SolarSpectrum filter, this 0.4x Telecompressor brings about a substantial reduction in focal ratio from f/30 to f/10.
  • The 74 mm working distance to the camera sensor is ideal for video capture as well as full disc solar imaging.
  • 16 mm corrected image field coincides with the TZ-3 Telecentric system.
  • 2" male threads on each side fit the Baader Universal Flange Adapter included with the SolarSpectrum H-Alpha filter.
  • This Baader 0.4x Telecompressor can both improve poor viewing conditions and expand the field of view for photographic or Lucky exposure imaging by enabling focal length adjustments.
Free shipping Free shipping
$369.00
 
Baader 2" to 1.25" Reducer for BDS-NT Diamond Steeltrack Focuser

Baader 2" to 1.25" Reducer for BDS-NT Diamond Steeltrack Focuser - BDS-RDCR

SKU: BAD-BDS-RDCR
  • 2" to 1.25" Focal Reducer from Baader Planetarium designed especially for the BDS-NT Diamond Steeltrack Focuser.
  • Contributes only 4.5" of optical height.
  • A 2" filter holder with M48 inner thread is included with this 1.25" reducer.
$29.00
 

Celestron .7x Focal Reducer for 9.25" EdgeHD Telescope - 94245

SKU: CEL-94245
  • Official 0.7X focal reducer for the Celestron 9.25" EdgeHD!
  • Large 42mm image circle for big sensors
  • The 9.25" EdgeHD focal reducer has a clear aperture of 60mm
  • 4-element optical system made from Lanthanum glass
  • Threads directly to the 3.25" threads of the EdgeHD 925
  • 43% wider field of view & one full f/stop faster!
Free shipping Free shipping
$329.95
 
Apertura 0.5x Focal Reducer - 1.25" and Extension Tube

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

SKU: APT-A-FR1
  • Inexpensive 1.25" Focal Reducer by Apertura
  • 0.5X reduction
  • Apertura focal reducer comes with a 25mm extension
  • Fully multi-coated doublet in black anodized cell
$29.95
 
Apertura 0.75X Focal Reducer for Ritchey-Chretien

Apertura 2" Focal Reducer with 0.75X Reduction for Ritchey-Chretiens - A-RCR

SKU: APT-A-RCR
  • Apertura RC Reducer offers 0.75X reduction
  • f/8 RC's are reduced to f/6; f/9's transform to a scope with an effective focal ratio of f/6.75!
  • 2" barrel
  • 70mm - 80 mm focus distance from sensor to reducer thread
  • 15mm image circle
  • Reducer only, no flattening ability
Free shipping Free shipping
$119.95
 

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