That's a brilliant set of three EPs for your scope. If money is no object then you may also like to consider Nikon SAV Hyper-Wide (HW) 12.5mm that comes with 10mm converter barlow group. One day when I am rich and/or insane I'll buy that EP. Somewhat more sanely priced are the Nikon SAV SWs that are comparable to Pentax XWs i.t.o. performance. See
http://www.kkohki.com/English/kkohkiparts.html
For higher powers, the problem with 4-8mm orthos is very short eye relief. You'll be looking through a tiny pinhole. You're better off adding a 5mm XW to your list. Or you could buy a barlow. (I'd get a barlow in any case. And a few tube extensions, which will allow you to tune the magnification of the barlow. No matter how many EPs you have, the versatility a good barlow offers for little extra investment is hard to argue with.)
Short FL orthos are for hardcore dedicated planetary observers imho. They really need patience and persistence; I could never get the hang of anything under 7mm, and even 7mm was getting uncomfortable. I suggested a 12/12.5mm for your scope because it's ideal for deep sky and you could barlow it for planets.
Quote:
Originally Posted by poncho
Hrmmmm okay okay. Will try have a look at a star party but its tempting
looking at
1. Ethos 13mm
2. Panoptic 27mm 2"
3. Pentax XW 7mm
and then a orthoscopic for planets... wud i need 4-8mm as opposed to the 12/12,5mm?
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