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Old 25-06-2007, 10:33 AM
PeteMo (Pete)
Bagdad astro nut

PeteMo is offline
 
Join Date: Nov 2006
Location: Chelmsford, UK
Posts: 156
Pentax XF12 Users query (Steve H - Janoskiss?)

I'm looking at the 12-13mm eyepiece range and am drawn to the Pentax XF 12mm and Hyperion 13mm as they are both $215. I already have the hyperion 8mm and love it. Quite a few people, like our own Steve H, rave about the Pentax and report that it has an excellent light throughput with 6 elements to the Hyperion's 8 elements.

My main concern about the XF range is that Pentax state that this a bird watching eyepiece for spotting scopes, yet Frontier Optics tout it as a Planetary Eyepiece. Is this also OK for Deep Sky, Nebulae, Clusters and dare I ask Galaxies?

Am I correct in treating the XF as an XW with only a 60 degree Apparent Field of View, with an excellent bank to buck ratio compared to the more expensive wider angled Pentax sibling?

The scope will be an F4.72 SkyWatcher/Saxon 10" dob, which is why I picked on Steve.
TIA
Pete
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