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Baader Hyperion 5mm Plossl?

PostPosted: Sun Oct 24, 2010 7:30 am
by 47Tuc
In the September Group Test of Planetary eyepieces the Baader Hyperion 3.5mm and 5mm's optical design is described as "Plossl". Since they each have 8 glass elements, how can they be Plossls?

RE: Baader Hyperion 5mm Plossl?

PostPosted: Tue Nov 02, 2010 10:40 am
by 47Tuc
No reply?...from [i]anyone[/i]?[&o]
I would have thought that experienced astronomers would know the answer: Can an eyepiece with eight elements in 5 groups be a Plossl? I presume the answer is no and therefore the group test has got it wrong.

RE: Baader Hyperion 5mm Plossl?

PostPosted: Tue Nov 02, 2010 10:56 am
by brianb
[quote]Can an eyepiece with eight elements in 5 groups be a Plossl? [/quote]
No, but it can be a Plossl with a built-in barlow / powermate ... the Hyperions certainly have the latter. The actual design is proprietary.