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Green Monday - Loads Of Telescope Deals!

Reducers & Correctors

Items 1 - 25 of 26
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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$149.95 $134.95

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

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.
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$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.
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$249.00
Stellarvue 0.72 Focal Reducer & Field Flattener for SVA130T 3" Feather Touch Focuser with 48 mm Camera Adapter

Stellarvue .72 Reducer/Flattener for SVA130T-3FT with 48 mm Camera Adapter - SFFR72-130-3FT-48

SKU: STV-SFFR72-130-3FT-48
  • Stellarvue 0.72x Focal Reducer and Field Flattener expressly designed for Stellarvue SVA130T refractor telescopes with 3" Feather Touch focuser.
  • Converts the Stellarvue 130 mm f/7 refractor into a faster f/5 instrument for wide field imaging.
  • Offers 55 mm of backfocus with 48 mm male camera thread using supplied adapters.
  • Best suited for full frame DSLR camers with larger 48 mm t-rings.
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$695.00

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.
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$249.00
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
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$449.99 $349.99
Stellarvue SV70T Focal Reducer and Field Flattener

Stellarvue SV70T Focal Reducer and Field Flattener - SFFR-70APO

SKU: STV-SFFR-70APO
  • Stellarvue Focal Reducer and Field Flattener for the SV70T APO Triplet Refractor.
  • Converts the effective focal length of the Stellarvue SV70T from 420 mm (f/6) to 336 mm (f/4.8).
  • Standard M48 thread permits the addition of 2" filters for imaging.
  • 55 mm back focus for DSLR imaging increases to 66 mm with the removal of the included 11 mm extension tube.
  • Optional 42 mm spacers are available for obtaining the appropriate back focus distance for your CCD camera.
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$179.00
Stellarvue SFFR80A Field Flattener & Reducer

Stellarvue 0.8X Reducer & Flattener for SV80A Access - SFFR80A

SKU: STV-SFFR80A
  • This Stellarvue 2" Field Flattener and Focal Reducer provides 0.8x reduction for the SV80A Access doublet refractor telescope.
  • Converts the 80 mm f/7 Access refractor into a faster f/5.6 instrument with a 448 mm effective focal length.
  • Features 55 mm of backfocus to match that of a DSLR camera with appropriate t-ring.
  • Accepts standard 2" filters as well as spacers with M42 threads for CCD imaging.
  • Not compatible with the Stellarvue SV80ST triplet refractor.
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$189.00
Optec NextGEN MAXfield with Spot Diagram

Optec NextGEN MAXfield 0.33X SCT Telecompressor - 17403

SKU: OPT-17403
  • This Optec NextGEN MAXfield 0.33x Telecompressor converts classic f/10 Schmidt-Cassegrain telescope systems into extremely fast f/3.3 systems, and f/11 SCT's into much faster f/3.7 instruments.
  • The telescope side contains a 2" barrel that is compatible with the Optec TCF-S or any 2" focuser or accessory, while the camera side contains a 2.1" diameter dovetail for accepting an optional camera adapter.
  • Although the Optec NGM is suitable for use with a wide variety of imaging cameras with the appropriate mounting adapter, it is optimally equipped for C-mount cameras.
  • Internal optics for the Optec NextGEN MAXfield TeleCompressor were developed using Zemax optical design software.
  • Available both individually and with a camera mounting adapter.
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$325.00
Spot Diagram for Optec Ultra WideField

Optec NextGEN Ultra WideField 0.7XL Telecompressor - 17409

SKU: OPT-17409
  • Optimally suited for APO refractors such as the Takahashi FS Series, this Optec NextGEN Ultra Widefield Telecompressor also works with telescopes like the Meade ACF or Celestron EdgeHD that feature well-corrected optics.
  • Although this high quality 4-element Optec TeleCompressor is compatible with f/5.6 to f/20 focal ratio systems, it is optimized for converting f/8 telescopes into f/5.6 telescopes.
  • The telescope side contains a 2" barrel that is compatible with the Optec TCF-S or any 2" focuser or accessory, while the camera side contains a 2.1" diameter dovetail for accepting an optional camera adapter.
  • With the proper optional mounting adapter, the Optec NGUW can be made to fit a wide range of imaging cameras.
  • Internal optics for the Optec NextGEN MAXfield TeleCompressor were developed using Zemax optical design software.
  • Available both individually and with a camera mounting adapter.
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$325.00
Stellarvue Reducer & Field Flattener for SVR90T-25SV Refractor

Stellarvue Reducer/Flattener for SVR90T with 2.5" Focuser - SFFR90-25

SKU: STV-SFFR90-25
  • Stellarvue 0.8x Focal Reducer and Field Flattener expressly designed for the SVR90T triplet refractor telescope.
  • Compatible with both 2.5" Stellarvue and 2.5" Feather Touch focusers.
  • Reduces the 90 mm triplet refractor's effective focal length from 540 mm f/6 to 504 mm f/5.6.
  • Accepts standard 2" filters with 42 mm thread for CCD imaging.
  • Contains identical 55 mm back focus to that of a DSLR camera with t-ring.
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$229.00
Stellarvue Focal Reducer & Field Flattener for SVA130T with 3" FT Focuser - No Camera Adapters

Stellarvue Reducer/Flattener for SVA130 with 3" Feather Touch Focuser - Camera Adapters Not Included - SFFR72-130-3FT

SKU: STV-SFFR72-130-3FT
  • Designed specifically for Stellarvue SVA130T refractor telescopes with 3" Feather Touch focusers, this Reducer/Flattener provides 0.72x focal reduction.
  • Converts the Stellarvue 130 mm f/7 refractor into a faster f/5 instrument for wide field imaging.
  • Features M82 rear thread and provides 69 mm of backfocus.
  • Does not include the adapters required to achieve proper spacing for your particular camera.
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$649.00
Stellarvue Focal Reducer & Field Flattener for SVA130 with 3" FT Focuser and 42 mm Male Adapter

Stellarvue Reducer/Flattener for SVA130 with 3" Feather Touch Focuser and M42 Adapter - SFFR72-130-3FT-42

SKU: STV-SFFR72-130-3FT-42
  • Designed specifically for Stellarvue SVA130T refractor telescopes with 3" Feather Touch focusers, this Reducer/Flattener provides 0.72x focal reduction.
  • Reduces the SVA130T's effective focal length from f/7 to f/5 for a faster optical system.
  • Includes the adapters needed to achieve the required 55 mm backfocus with cameras using standard 42 mm male thread.
  • Optimally suited for APS-sized DSLR cameras with standard t-rings.
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$695.00
Stellarvue 0.72x Focal Reducer & Field Flattener for SVA130T with 2.5" SV Focuser and 48 mm Camera Adapter

Stellarvue Reducer/Flattener for SVA130 with 2.5" Focuser and M48 Adapter - SFFR72-130-25-48

SKU: STV-SFFR72-130-25-48
  • Stellarvue 0.72x Focal Reducer and Field Flattener made especially for SVA130T refractor telescopes.
  • Converts the Stellarvue 130 mm f/7 refractor into a faster f/5 instrument for wide field imaging.
  • Compatible with 2.5" Stellarvue focusers.
  • Offers 55 mm of backfocus with 48 mm male camera thread using supplied adapters.
  • Without the use of adapters, M69 rear thread enables an approximately 69 mm backfocus.
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$695.00
Stellarvue .72x Focal Reducer & Field Flattener for SVA130T with 2.5" Focuser & M42 Camera Adapter

Stellarvue Reducer/Flattener for SVA130 with 2.5" Focuser and M42 Adapter - SFFR72-130-25-42

SKU: STV-SFFR72-130-25-42
  • Stellarvue SFFR72 Focal Reducer and Field Flattener expressly designed for SVA130T refractor telescopes.
  • Promotes wide field imaging by reducing the effective focal length from f/7 to f/5.
  • Offers compatibility with the 2.5" Stellarvue focuser.
  • Includes an M42 camera adapter for achieving proper 55 mm back focus for DSLR imaging.
  • M69 rear thread provides approximately 70 mm of back focus without using the included adapter.
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$695.00
Meade Series 6000 2" 3-Element Focal Reducer/Field Flattener

Meade Series 6000 3-Element 2" 0.8x Field Flattener - 661000

SKU: MEA-661000
  • This Meade 2” Series 6000 Focal Reducer & Field Flattener helps astrophotographers capture wide-field celestial images via a fully multi-coated three-element optical design.
  • Made especially for reducing the focal length of Meade 80 mm Series 6000 APO refractor telescopes in order to provide a more expansive field of view.
  • Provides a 0.8x reduction in focal length.
  • Cameras attach easily via M42 outside diameter T-threads.
  • Contributes 55 mm of back focus plus an additional 11 mm with the included spacer.
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$249.00
Meade Series 6000 0.8x 3-Element Focal Reducer & Field Flattener - 3"

Meade 0.8x 3-Element Series 6000 Field Flattener - 3" - 661001

SKU: MEA-661001
  • This Meade 3” Series 6000 Focal Reducer & Field Flattener helps astrophotographers capture wide-field celestial images via a fully multi-coated 3-element optical design.
  • Reduces the focal length of Meade 115 mm and 130 mm Series 6000 APO refractor telescopes by a factor of 0.8x to increase the width of the view field.
  • Easy camera attachment enabled by M48x0.75 outside diameter thread.
  • Contributes 55 mm of back focus to your imaging system.
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$349.00

Stellarvue .72 Focal Reducer, Flattener & Rotator with Camera Adapter for SVX130T - SFFRR72-130-48

SKU: STV-SFFRR72-130-48
  • Stellarvue 0.72X reducer, field flattener & rotator for SVX130T
  • This version of the SFFRR72 comes with adapters for DSLR & CCD Camera
  • Requires a 48mm T-Ring for your DSLR
  • Telescope side has M75 male threads
  • Camera side has M69 female threads
  • Back focus is 68 mm for SVX130
  • Works for SV130T with 3" FT focuser but additional adapters are required
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$695.00

Stellarvue .72 Focal Reducer/Flattener with Rotator & Camera Adapter for SVX152T - SFFRR72-152-48

SKU: STV-SFFRR72-152-48
  • Stellarvue 0.72X reducer, field flattener & rotator for SVX152
  • This version of the SFFRR72 comes with adapters for DSLR & CCD Camera
  • Requires a 48mm T-Ring for your DSLR
  • Telescope side has M75 male threads
  • Camera side has M69 female threads
  • Back focus is 65 mm for SVX152
  • Works for SV152T with 3" FT focuser but additional adapters are required
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$695.00

Stellarvue .72 Focal Reducer/Flattener with Rotator for SVX130T and SVX152T Refractors - No Camera Adapter - SFFRR72-69

SKU: STV-SFFRR72-69
  • Stellarvue reducer, field flattener & rotator for SVX130 & SVX152
  • This version of the SFFRR72 does not come with camera adapters
  • Reduction is 0.72X
  • Telescope side has M75 male threads
  • Camera side has M69 female threads
  • Back focus is 68 mm for the SVX130 and 65 mm for SVX152
  • Works for SV130T with 3" FT focuser but additional adapters are required
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$649.00
William Optics 0.72x Reducer/Flattener

William Optics 0.72x Reducer/Flattener 8 - P-FLAT8

SKU: WYO-P-FLAT8
  • This William Optics Focal Reducer and Field Flattener provides f/6 to f/7/8 focal ratio refractors with 0.72x reduction in effective focal length.
  • Features an STM-coated, fine doublet air-spaced designed lens made using only top-notch Ohara optical glass.
  • Provides coverage for DSLR cameras with full size 50 mm clear lens aperture.
  • Uses internal threading and blackening to eliminate all reflections.
  • All standard camera t-rings with M48x0.75 thread are accepted.
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$698.00

William Optics Adjustable 0.8x Focal Reducer & Field Flattener - 2" - P-FLAT6AIII

SKU: WYO-P-FLAT6AIII
  • William Optics 0.8X Focal Reducer/Field Flattener is adjustable for optimum back-focus!
  • Amount of adjustment depends on the WO refractor it is paired with
  • Designed to fit William Optics f/6 to f/7.5 refractors including GT71, GT81, Z103 & Z81
  • M63 threads on scope side & 48mm threads on camera side
  • The Flat6AIII uses fully multi-coated Ohara low dispersion glass
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$198.00

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!

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