Posted 07 May 2013 - 04:42 AM
As I was "saying" to "Unidentified 130" just this morning, perhaps use the "eyepiece money" you have available to you to invest in a Baader Zoom; a very popular unit amongst many "Nexstarers" here, representing a wide range of quality eyepieces rolled into one.
My feeling is that with one of these EPs, you would not need to invest further in a Barlow lens nor very probably a focal reducer/corrector, leaving perhaps a little over for such items as a dew shield for example. (Obviously, I don't know your budget).
As to what you may expect to see with your Nexstar 8iSE, forget limiting Magnitude 14 and all that, similarly, and as discussed earlier, limiting upper magnifications etc. Just bear in mind that your main "limiter" will be the seeing conditions and transparency of the sky itself on any night you venture out with your 'scope.
But perhaps to give you an idea.
Put it this way, you won't be able to see Pluto at its ca, Magnitude 14 ! You will however be able to pick up Neptune at its Magnitude ca.8 but only as a small pale blue disc. Likewise Uranus at Magnitude ca.5 as a pale green disc. You will not however see any detail on either.
Moving though to Saturn and with the rings open as they are currently, you should be able to resolve the Cassini division but not Encke's. The sphere itself should also give some subtle cloud banding on a good seeing night.
Jupiter's markings are much better defined so these should present your 'scope with no problem in picking them up. The Great Red Spot will also be visible to you (when on view), as will of course the four Gallilean satellites and the shadows they cast on Jupiter's disc as they transit the planet.
By simiar token, the dark markings on the surface of Mars will be apparent and of course views of the moon's craters etc. are there to be enjoyed.
Moving on to, say, globular clusters, you should expect to resolve many individual stars within most of them using something like a 10 -13mm EP. Galaxies and nebulae on the other hand, will appear in general as "Faint Fuzzies"; the usual description given !
Does this help ?