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Quadruplet List

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#1 damarks913

damarks913

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Posted 20 October 2021 - 08:53 PM

In looking up quad refractors, there are so many "off-brands", which may or may not be an off-brand to the rest of the world.

 

So how many different badges have a quad?

 

I'll start:

 

Sharpstar

Meade

TS

Astrotech (discontinued)



#2 rexowner

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Posted 20 October 2021 - 09:09 PM

I blv the Long Perng 62mm f8.4 is a quadruplet Petzval.

http://www.longperng...?act=view&no=24

"4 elements in 2 groups"

 

Orion sells this as a "Travel Refractor", but doesn't emphasize the design.


Edited by rexowner, 20 October 2021 - 09:10 PM.


#3 rexowner

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Posted 20 October 2021 - 09:12 PM

And of course, the APQ JENA dream refractors:

https://apq.de/en/polychromats.htm


Edited by rexowner, 20 October 2021 - 09:14 PM.

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#4 Lagrange

Lagrange

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Posted 20 October 2021 - 09:15 PM

William Optics - 51mm and 71mm RedCats

 

TeleVue - NP101 and NP127

 

Takahashi - FS60Q, FSQ-85 and FSQ-106

 

APQ Jena - 150mm Polychromat


Edited by Lagrange, 20 October 2021 - 09:20 PM.

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#5 Psychlist1972

Psychlist1972

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Posted 20 October 2021 - 10:58 PM

Askar has Quintuplet Petzvals. FRA400/500/600




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