Quote:
Originally Posted by glend
John, the problem with 4 & 5 mm eyepieces in general is that you will rarely be able to use them. The problem is 'Seeing' conditions usually do not suit these high powered EPs. If you lived out inland at a dark site with really good Seeing, then they might be useful. But your in Brisbane, and i doubt you could ever get a great image out of them there. For most folks a good 9mm EP, like a Televue Nagler is a better investment. You can use it in most conditions and if you ever do run into anazing Seeing you can stick on a 2x barlow to take it to 4,5mm power.
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I use my zoom eyepiece most of the time. In my Orion XT8i that would be my Baader Hyperion 8-24. Excellent eyepiece. Gives me 50 to 150X and everything between. Drop in a 2X barlow and I have 100 to 300X.
I am in the USA, New York City area, so my conditions may be different from yours. I do most of my observing under 200X and the seeing will rarely support over 250X.
In addition to the Zoom I also have Explore Scientific 82 8.8, 6.7 and a Meade 5000 82 degree 5.5. All excellent.
I have a 4.5 but rarely use it at 266X.