Quote:
Originally Posted by ving
...GSO make good eyepieces that will keep you going for some time. If i were to sugest 3 eyepieces they would be 7mm, 15mm and 30mm. seeing as you have a 1000mm focal length the 7mm by its self should create a usable amount of magnification for planets  |
I'd tend to disagree with Vingo here, and would recommend using a barlowed 15mm plossl instead of a 7mm plossl. Latter will have very little eye relief. But what's too little comes down to personal preference.
Best barlow for high powers IME is the fully baffled Orion Deluxe 1.25". Got mine for $99 from Sirius Optics in QLD. An absolute bargain.
GSO 15mm plossl is okay but not the best of the GSO range. You already have a 25 and 10mm EP (silver-top Skywatchers I presume, which are decent EPs). On minimal budget I'd just add a 15mm, a 2x barlow (+ optionally a extension tube) to make a comprehensive set for all occasions from low to high power.
Few more thoughts for you to consider at your peril:
A 15mm will be very useful for deep sky on its own and on planets barlowed, so you might want to make it a good one. "Ultima" style plossls are the best plossls for general purpose viewing IME. Cheapest of this style EPs are the Antares Elites but need to order from o/s (eg scopestuff). More expensive ones, e.g. Orion Ultrascopic, Parks Gold (try AEC in Adelaide), are a better due to full multi-coatings but Elites with MC are quite good already.
If you want the best for planetary viewing with your scope but still for a reasonable amount of money, then 12mm UO HD ortho (try Frontier Optics qld) with the Deluxe barlow - and optionally extension tube for upping the power when desired, but barlow+ortho combo will give you about 220-230x which is normally perfect.
Televue plossls are also highly regarded by many and having owned a few I'd agree that they are up there with the best. However, for your scope and purposes I would recommend the above mentioned EPs before TV plossl for reasons I'll omit for now lest this post never end.
