Paracorr-Newtonian for Visual and Imaging to f/3! Part 2

 
At top is a cropped image of the Pinwheel Galaxy (M101) by AstroBin user Luca Marinelli. All rights reserved. Imaged through Teleskop Service ONTC 10″ f/4 Newtonian with Tele Vue Paracorr Type 2 coma corrector and ZWO ASI1600MM Pro mono camera. At right is the Tele Vue Paracorr logo. At bottom are the placement and back focus diagram for the 3″ BIG Paracorr.

In the last blog, we covered the history of the Newtonian reflector, its inherent aberrations, and how Tele Vue’s Paracorr enlarged the “sweet spot” of fast scopes to cover the entire field. We also compared the Paracorr – Newtonian combination against more “exotic” telescope designs for imaging. If you missed it, you can read Part 1 before continuing.

Which Paracorr to Use?
Over the years there have been two optical versions of the Paracorr.  The original Paracorr came in various mechanical designs which developed as we developed new eyepieces. For this BLOG, we’ll focus on the currently available three versions of the Type-2 Paracorr: 2″ Photo/Visual, SIPS, and 3″ Photo models. Performance improvement over the original Paracorr is most noticeable on all Newtonian/Dobsonian telescopes of f/4.5 and faster.

Continue reading “Paracorr-Newtonian for Visual and Imaging to f/3! Part 2”

BIG Paracorr User Profile:
Jay Butler

NGC7000 Cygnus Wall” by flickr.com user Jay W Butler. All rights reserved. Used by permission. Paracorr logo is trademark of Tele Vue Optics, Inc.

From his backyard observatory in Bountiful, Utah, in the western foothills of the Wasatch Mountains, Jay Butler images the heavens with his 10″ f/4 fast Newtonian – equipped with a Tele Vue BIG Paracorr Type-2. Despite the poor seeing – from suburban light pollution and strong updrafts from the valley floor – he’s been able to score a medley of celestial clusters, galaxies, and nebulae that cross his sky.  Continue reading “BIG Paracorr User Profile:
Jay Butler”