Which eyepiece would be good for my scope?

Question

I have a 5 inch newtonian and I'd like to know which of these eyepieces would be good for it ?

http://www.burgessoptical.com/EPs/Planetary.html

Answer 1

They'd probably all work, but the shorter focal lengths offered are so short that they would probably make the magnification of your telescope too high. (Excessive magnification is one of the big problems in successful use of small telescopes.) You'd probably be happiest with a 25 mm focal length as a first eyepiece.

Answer 2

Any of those would be good, except possibly the 2.5mm. That one would probably produce too much magnification for your scope. It's impossible to make a specific recommendation without knowing the focal length of your scope and what sort of observing you hope to do.

In general, I'd look to start an eyepiece collection with eyepieces approximately 1, 2, and 5 times your focal ratio. So it's an f/5 scope, 5, 10, and 25mm eyepieces (or 10, 25, and a good 2x barlow). Which one of the Burgesses to buy first depends on what you like to observe, also. Go for a shorter focal length for planets and double stars, or a longer one for deep space objects.