Universal Focal Reducers

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Arcturus 1.25" Focal Reducer for Eyepieces and Cameras 0.5x

.5x Focal Reducer in 1.25" Filter Format Perfect for webcams and CCD cameras, this reducer screws into your CCD camera nosepiece, eyepiece, or any barrel or adapter that accepts 1.25" filters. Reduction varies from .3x to .6x depending on placement in the system. Fully coated optics, black anodized aluminum ring. Filter thread barrel extensions can be used as spacers to adjust the distance between the focal reducer and imaging chip. Two models provide 1" and 0.475" spacings. Black anodized aluminum, 1.25" outside diameter.


Our price: $49.95 (€43.46)
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Arcturus 2" Focal Reducer for Eyepieces and Cameras 0.5x
For larger format imaging, these reducers screws into your CCD camera nosepiece, eyepiece, or any barrel or adapter that accepts 2" filters. Reduction varies depending on placement in the system. Fully coated optics, black anodized aluminum ring. Has male 2" filter threads, does not have female threads on the other side. Made in Canada.
Filter thread barrel extensions can be used as spacers to adjust the distance between the focal reducer and imaging chip. Exension sold separately, not included with reducer.

Our price: $59.95 (€52.16)
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Ioptron 2 inch Field Flattener

The iOptron field flattener reduces the normal field curvature inherent in all refractors to provide you with images that are sharply focused out to the very corners of your 35mm or large format CCD imager frame. Stars look sharp and point-like all the way across the field.

 

This 2” iOptron field flattener is designed for iOptron’s Versa 108 ED refractor, but also is compatible with most f/5 to f/7 refractors


Our price: $220.00 (€191.40)
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Orion Universal Field Flattener for Refractors
* Eliminate field curvature in short, optically fast refractor telescopes with this handy 38mm clear-aperture, fully multi-coated field flattener
* Designed for use with 400mm to 650mm focal length refractors with f/5 to f/7.5 focal ratios
* Optimizes your fast refractor telescope for astrophotography
* Preserves focal length attributes of the attached refractor telescope while flattening the field of view
* Requires 55mm of refractor telescope backfocus, weighs 7.5 oz.

Our price: $139.99 (€121.79)
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Orion Variable Field Flattener for Short Refractors
  • Corrects field curvature in short refractor telescopes to produce an optically flat imaging field for optimized imaging performance
  • Designed for use with 400-660mm focal length, f/5-f/6 refractor telescopes
  • Adjustable 55-80mm lens-to-sensor range accommodates many different cameras without requiring spacer rings
  • Rigid lock mechanism ensures zero flexure
  • Features a 2" tapered barrel which securely fits 2" telescope focusers, and includes interchangeable standard T-thread (M42) and wider-format M48 camera attachment adapters

Our price: $199.99 (€173.99)
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