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TeleVue - BIG Paracorr Type-2 for 3" Focusers

  • TeleVue - BIG Paracorr Type-2 for 3" Focusers
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Product Description

TeleVue BIG Paracorr Type-2 for 3" Focusers

The TeleVue Big Paracorr Type-2 for 3" focusers, designed by Paul Dellechiaie, extends the Paracorr type 2's optical benefits for imaging applications by amateurs and professionals using CCD formats as large as 52mm diagonal and paraboloids as fast as f/3.  Back focal length has been extended to 80mm to allow for additional accessories to be placed in the optical path. The 5.1" length optical assembly is topped with a "stop" flange having 3.40"-24 pitch threads to mount camera adapters and spacer tubes (available later).

Optimizing the Coma Correction by Using Paracorr's Tunable Top

Experienced astro-imagers know that all Newtonian / Dobsonian telescopes can benefit from using a Tele Vue Paracorr (Parabola Corrector) to eliminate coma in the image. One aspect to optimizing this correction is the distance of the eyepieces focus point (field stop location) to the last surface of the Paracorr lens (within a small +/- tolerance).  Typical eyepieces used with fast Newtonians can have field stop locations differing by as much as half an inch.  To accommodate for the differences, TeleVue developed the "Tunable Top".   The "Tunable Top" permits optimized aberration control for all Tele Vue eyepieces and many others, by simply loosening a screw and rotating the Tunable Top. The eyepiece barrel height raises and lowers, allowing you to maintain the proper field stop to Paracorr lens distance.

VIP-3010 3" BIG Paracorr Type-2  features:

  • weight 1.5 lbs.
  • barrel fits 3" focusers
  • eyepieces accepted 2" or 1¼"  (requires adapter  & tunable top)
  • mag. (Barlow) effect 1.15x
  • Back Focus 80mm
  • Base to flange 5.125"
  • Flange specs 3.40" x 24 TPI


Name TeleVue - BIG Paracorr Type-2 for 3" Focusers
Manufacturer TeleVue
Model TEL-VIP-3010
Backfocus Distance 80mm

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