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Sterling plossls fast scopes

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3 replies to this topic

#1 aatt

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Posted 26 November 2012 - 02:27 PM

Has anyone used the Sterling Plossls in F/5 or less? They have won praise on CN
see-- Review of the Sterling series of eyepieces
---by Michael Downs 10/12/10

Anyone like/dislike these in fast scopes? They are dirt cheap! Might be worth picking up a couple in seldom used Fl I am thinking...

#2 dlapoint

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Posted 26 November 2012 - 03:22 PM

I find they work well even at f4.7

#3 M44

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Posted 26 November 2012 - 06:53 PM


I tried 17mm on my Tak FS-60CB (f/5.9) few years ago, I did not like the view, only 30-40% of the FOV was usable.

#4 BillP

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Posted 26 November 2012 - 08:30 PM

Their optical design is similar to TVs using a concave eye and field lens instead of the standard flat surfaces. I did an in-depth comparison of the 20mm Sterling vs 20 TV Plossl and they were neck-in-neck in the transmission department and the off-axis went to the Sterling performing a tad better in my XT10 f/4.7 at the same TFOV off-axis position than the TV. They are a steal. 4mm and 6mm I'm not so thrilled about, ER just too short.


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