Quote:
Originally Posted by mental4astro
There is a forth option - the 5mm Baader Hyperion. It is the only Hyperion that is a good optical match with Newtonians. I've used it in my 8" f/4 dob, and it is superb. Good eye relief, great wide AFOV at 68deg, nice flat field, no pincushion and sharp all the way across the field of view. With the 8" f/4 dob, I've also pushed it with a 2X barlow to get 360X on Saturn - blooming excellent image. Conditions were excellent to be able to push things this far, and this eyepiece was up to the task.
New they come in well under your $200 limit, and even better second hand.
I have a 10mm XW, which is great in my fast Newt's, but not in my C8, so I'm not all that happy with it as I can't use it for my lunar sketching. Yet when conditions allow it, I can use the 5mm Hyperion in both my Newt's, and the C8 for sketching. That leaves me very pleased with it.
Mental.
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Thanks Alex, yes I've had the 5mm Orion Stratus, very similar to the Hyperion (I've owned the 8mm Hyperion also - a nice eyepiece) but found that the 5mm was almost unusable unless I was at a dark site or when conditions were especially good. When you get sick of the XW 10mm give me a shout and I'll take it off your hands for a good price
