Skip to content HPS logo

10% Off TeleVue Eyepieces, Powermates & Barlows

Reducers & Correctors

Items 1 - 25 of 71

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
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!
Free shipping Free shipping
$149.95 $134.95

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
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

Meade Series 4000 f/6.3 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 $82.95

Tele Vue Large Field Flattener for Tele Vue 101 or 127 IS Telescopes - LCL-1069

SKU: TLV-LCL-1069
  • Tele Vue Large Field Corrector designed specifically for NP101is and NP127is telescopes.
  • Provides a flattened image field for both the 101 mm and 127 mm Nagler-Petzval APO refractors.
  • Enhances edge-of-field quality for imaging use.
  • Optimally suited for use with CCD sensors measuring 35 mm or larger.
$239.95

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

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.
$299.95

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

William Optics 0.8x Reducer/Flattener - P-FLAT7A

SKU: WYO-P-FLAT7A
  • This William Optics 0.8x reducer/flattener is adjustable for optimum back focus.
  • Adjustment depends on the William Optics refractor with which the flattener is used.
  • This flattner is meant to work with the FLT132, FLT156, GT102, GT153, and the Z126.
  • The FLAT7A is compatible with several types of CCD and CMOS cameras.
  • The flattener is produced with Ohara optical glass.
$598.00

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
Free shipping Free shipping
$1,060.00

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

SKU: BAD-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
$207.00

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

SKU: BAD-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
$209.00

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 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

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

SKU: TLV-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.
Free shipping Free shipping
$487.00 $438.00

Sky-Watcher 0.85X Reducer/Corrector for Pro 100ED Telescope - S20201

SKU: SKY-S20201
  • Optimized for Sky-Watcher Pro 100ED apochromatic refractor telescopes, the SkyWatcher 0.85x Focal Reducer/Corrector enables faster optics for improved astrophotography performance.
  • Reduces the focal ratio of 100 mm Pro ED APO refractors from f/9 to f/7.56.
  • In addition to lowering the 100 mm Pro ED's effective focal length, this accessory also improves field-edge correction considerably.
  • Works best in conjunction with Sky-Watcher M48 T-ring adapters.
Free shipping Free shipping
$249.00

Sky-Watcher 0.85X Reducer/Corrector for Pro 120ED Telescope - S20202

SKU: SKY-S20202
  • This SkyWatcher 0.85x Focal Reducer/Corrector is designed for those who wish to bolster their Sky-Watcher Pro 120ED APO refractor's astro-imaging capabilities.
  • Reduces the focal ratio of 100 mm Pro ED APO refractors from f/7.5 to f/6.3
  • Provides effective focal length reduction by a factor of 0.85x while greatly improving field-edge correction.
  • Works best in conjunction with Sky-Watcher M48 T-ring adapters.
Free shipping Free shipping
$249.00

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.
Free shipping Free shipping
$285.00

Sky-Watcher 0.85X Reducer/Corrector for Pro 80ED Telescope - S20200

SKU: SKY-S20200
  • This SkyWatcher 0.85x Focal Reducer/Corrector is designed for those who wish to bolster their Sky-Watcher Pro 80ED APO refractor's astro-imaging capabilities.
  • Decreases your 80 mm ProED's focal ratio from f/7.5 to f/6.3.
  • Provides effective focal length reduction by a factor of 0.85x while greatly improving field-edge correction.
  • Contributes 55 mm of backfocus.
  • Optimally suited for use in conjunction with Sky-Watcher's M48 T-ring adapters.
Free shipping Free shipping
$249.00

Tele Vue 2" Tunable Top with 1.25" Adapter - ATT-2125

SKU: TLV-ATT-2125
  • This Tele Vue 2" Tunable Top with 1.25" Adapter is identical to the one included the TeleVue 2" Paracorr Type 2.
  • Works in conjunction with the Tele Vue Visual/Imaging System Adapter (VISA) to enable the 3" BIG Paracorr for visual applications.
  • Attaches to the TeleVue VISA which is in turn attached to the 3" BIG Paracorr following removal of the flange.
  • Included adapter enables the use of 1.25” eyepieces.
$155.00
Explore Scientific 3" Field Flattener + 0.7x Focal Reducer

Explore Scientific 3" Field Flattener & .7X Focal Reducer - FFFR507X-00

SKU: EXS-FFFR507X-00
  • This field flattener and focal reducer package is for the Explore 152 or 127 Triplets with 3" focusers
  • Flattens the field beautifully and reduces effective focal length by 0.7X
  • 55 mm of back focus from rear flange
  • Includes 3" adapter and M42 photo adapter
  • Optional adapters available for 2.5" HEX focuser & 2" focuser
Free shipping Free shipping
$449.99 $349.99

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!

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