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What is Paracorr?


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This is the similar to the Baader MPCC except it increases fl by 1.15x and is more expensive but works with TV eyepieces only. Paracorr is a coma corrector specifically designed for TV eyepieces only.

John.

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Newtonian telescopes can be perfect on axis, but off centre they are all affected by coma and the lower the f-number, the more coma. Paracorr is the Televue trade name for a coma corrector and it works in any newtonian telescope (with a 2" focuser) with any eyepiece where the correct spacing (55mm) from the focus of the eyepiece can be set. The Paracorr has a turntable to achieve this and Televue publish settings for their own eyepieces. For other eyepieces there are methods published online for determining the best setting.

Edited by cs1cjc
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This is the similar to the Baader MPCC except it increases fl by 1.15x and is more expensive but works with TV eyepieces only.

Actually it will work with any well-corrected eyepiece.

There is a positive benefit in the small increase in focal length, it makes life easier for the eyepiece designer - even Al Nagler has difficulty designing an eyepiece that waill work well at f/4, f/4.5 is much easier to work with.

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  • 3 years later...

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