Accessory Kit
What is a good assortment of eyepieces to have for my telescope?
It came with a 25 mm and a 10 mm eyepiece. It isn't a very expensive telescope to begin with so I don't want to spend hundreds of dollars on eyepieces. Is this a good set:
http://www.telescope.com/control/celestron/celestron-accessories/celestron-1*25-inch-eyepiece-and-filter-accessory-kithttp://www.telescope.com/control/celestron/celestron-accessories/celestron-1*25-inch-eyepiece-and-filter-accessory-kit
Get one or two good ones rather than a set of closely spaced matched cheaper ones.
Since you don't describe your inexpensive telescope, I cannot begin to advise on a particular eyepiece for particular use. I can say in general:
1) Wide field are very good for use on star fields. The more expensive ones have wider views at the same power. 52-55 degree Plossl types ($50-60 each) are okay. Better are the extra wide angles of 65, 72, 82 degrees. The price goes up fast, into the hundreds of dollars. Newest ones are 100 and 110 degrees, and cost more than some whole telescopes.
Or, a more moderate eyepiece of longer focal length (32 mm and greater) will give lower power, but wider view even with the lower angle number. There is a practical limit to that, however. Either you run out of focuser tube diameter (1.25 is more limiting than 2 inch, but that will limit as well) or you make the exit pupil (where all the light comes out of the telescope system just outside the eye lens and where your eye's pupil must be placed) larger than 7mm and you waste light. What eyepiece limit that is depends on your scope. Cannot advise with no information on your scope. Read about how to calculate exit pupil vs scope lens/mirror diameter vs magnification vs focal length on the Internet.
2) High power ones will show smaller fields unless wide angle design. An inexpensive way to get high powers without very high cost is a Barlow lens. Buy the best brand ones for higher cost, because they do perform better. And, the eye relief (distance from eyepiece to exit pupil) will remain unchanged. Regular short focus eyepieces are harder to use because of short eye relief and tiny exit pupils. Most nights, the air is to disturbed to use very high magnifications, so this area is a minor consideration. And more than 60x per inch of scope aperture is empty magnification (bigger, fuzzier blobs) in all but the highest grade optical systems. People say they can get up to 100x per inch, a theoretical limit of optics, but that is very unusual.
There are many review sites on eyepiece selection. Cloudynights.com, Astromart, Ed Ting, and Todd Gross all do wonderful reviews.
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Accessory Kit
