What is a glass for a camara?

&what are good ones for a nikon d60

"Glass" is a slang for "lens."

Good ones include any of the fixed aperture zooms (usually with an f/2.8 maximum aperture, but sometimes f/4.0) or the better prime lenses, with an f/1.4 or f/2.0 maximum aperture.

The "good ones" are the zooms that cost upwards of a thousand dollars and the primes that cost around five hundred or more.

A handy all-purpose lens that is good for the D60 is the 18-200 zoom. It's not horribly expensive at around $700, either. I ahve really enjoyed the newer 28-300 zoom. You give up the widest part of the lens, but I enjoy the tele end more.