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Green Monday - Loads Of Telescope Deals!

Reducers & Correctors

6 Items

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
William Optics Flat4 Draw Tube Adapter for FLT Telescopes

William Optics Flat4 Draw Tube Adapter for FLT Telescopes - AD4-A006-L00GD03

SKU: WYO-AD4-A006-L00GD03
  • William Optics Flat4 Draw Tube Adapter made especially for the 3" V-Power Focuser
  • Provides improved connection and image circle while preventing vignetting.
  • Removal of the 2" nosepiece enables attachment to William Optics GT102 and FLT132 anniversary model refractor telescopes.
  • Not compatible with earlier model William Optics focusers.
$58.00 $46.40
William Optics Blue Flat4 Draw Tube Adapter for 3" V-Power Focuser with GT102 & FLT132 Refractors

William Optics Flat4 Draw Tube Adapter for 3" V-Power Focuser Only - Blue Version - AD4-A006-L00BU03

SKU: WYO-AD4-A006-L00BU03
  • William Optics Flat4 Draw Tube Adapter made especially for the 3" V-Power Focuser
  • This is the blue version of the Flat4 Adapter.
  • Provides improved connection and image circle while preventing vignetting.
  • Removal of the 2" nosepiece enables attachment to William Optics GT102 and FLT132 anniversary model refractor telescopes.
  • Not compatible with earlier model William Optics focusers.
$58.00
William Optics Black Flat4 Draw Tube Adapter for 3" V-Power Focuser with GT102 & FLT132 Refractors

William Optics Flat4 Draw Tube Adapter for 3" V-Power Focuser Only - Black Version - AD4-A006-L00BL03

SKU: WYO-AD4-A006-L00BL03
  • William Optics Flat4 Draw Tube Adapter made especially for the 3" V-Power Focuser
  • This is the black version of the Flat4 Adapter.
  • Provides improved connection and image circle while preventing vignetting.
  • Removal of the 2" nosepiece enables attachment to William Optics GT102 and FLT132 anniversary model refractor telescopes.
  • Not compatible with earlier model William Optics focusers.
$58.00
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.
Free shipping Free shipping
$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
Free shipping Free shipping
$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!

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