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Please recommend the best diagonal for this scope

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#1 nimitz69

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Posted 28 July 2021 - 05:10 PM

can folks recommend what they believe would be the best diagonal for this scope:

 

 

StellarVue 80mm ED Doublet Refractor, FL= 560mm, F7

 

 

thx!

 

 


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#2 Scott in NC

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Posted 28 July 2021 - 08:09 PM

Give this review of diagonals a read if you haven’t already seen it:  https://www.cloudyni...omparison-r2877.  It was written a few years ago by Bill Paolini, but is still quite relevant.  

 

Personally, I’ve enjoyed using both the Stellarvue and Astro-Physics 2” dielectric diagonals with my Stellarvue 80mm refractors.


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#3 Polyphemos

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Posted 28 July 2021 - 09:06 PM

There’s also this follow-up article, also by Bill Paolini, discussing the then new Baader Broadband Hardened Silver (BBHS) diagonal:

 

https://www.cloudyni...-diagonal-r3038


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#4 Scott in NC

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Posted 28 July 2021 - 09:16 PM

Thanks for finding that article, Jim.  I had somehow missed reading that one.



#5 nimitz69

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Posted 28 July 2021 - 09:56 PM

Thx guys I’ll check them out



#6 ThusSpokeZarathustra

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Posted 28 July 2021 - 10:39 PM

Not sure if F7 is too fast but, the APM 2" Prism Diagonal is my preference. Much better contrast than my William Optics Dielectric Mirror Diagonal!

 

https://luntsolarsys...adband-coating/



#7 Polyphemos

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Posted 28 July 2021 - 10:41 PM

Thanks for finding that article, Jim.  I had somehow missed reading that one.

You are very welcome, Scott.  The nine pages of comments following the article are also quite illuminating and, as always, Don Pensack and others help flesh things out and contribute their considerable expertise and experience to the discussion.  Great stuff!


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