Reducers, Extenders & Correctors

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Grid List

Set Descending Direction

1-12 of 155

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  2. 2
  3. 3
  4. 4
  5. 5

Coma Correctors and Accessories is home to the Televue Paracorr, which is short for "parabola corrector".  All parabolic mirrors used in Newtonian reflecting telescopes are limited in field sharpness due to coma.  If you're not sure of what "coma" means, take a look at the edges of your eyepiece field of view and see if star images look blurry or dragged.  Not all eyepieces will exhibit these characteristics, but with the new ultra-wide fields of view, it exaggerates the mirror's parabola.  A Paracorr is a universal corrector that tightens and intensifies star images on all f-ratios from f/3.5 to f/8 without adding any false color or spherical aberration.  You no longer have to constantly shift a Dobsonian to keep objects centered for sharp viewing.  For imaging, this is a bonus since astrophotography shows the whole field.  Coma Correctors and Accessories is also home to multi-purpose coma correctors which add no additional magnification.  All the adapters needed to make these little gems work either for visual or photographic purposes.

 

 

 

Focal Reducers, Field Flatteners, and Extenders all serve their own purposes.  A focal reducer comes with an extension tube that reduces your focal length - the length your focuser must travel to achieve a sharp image.  A focal reducer and field corrector lens makes it possible to have a dual focal ratio instrument.  A Focal Reducer/Field Flattener reduces the main telescope's focal ratio and reduces photographic exposure times by up to 50% and can be used for visual work when the user desires a wider field of view.  A telecompressor is a three-element optical system designed to provide a wide field of view for small to medium format CCD cameras.  Focal Reducers, Field Flatteners, and Extenders is also home to the extender, which works like barlow for visual use and as a tele-extender for photographic purposes.  OPT also carries webcam extenders and large field correctors, which optimize edge of field performance for imaging applications.

A critical role in astronomy imaging is the proper hardware to mount the camera to the telescope.  Here at OPT, we recognize your needs and carry a full line of Optec Mounting Hardware that includes: IFW/TCF/MAX Mounts and Accessories, NextGen CCD Mounting Plates, Original Max/Wide Field Mounting Plates, and Pyxis Mounts and Accessories.

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