Telescope Eyepieces are interchangeable parts that enable you to use your telescope at a variety of powers suitable for different applications. The more eyepieces you own, the more versatile your telescope.
Most telescopes include one or more eyepieces. Typically, the main eyepiece will have a 25mm focal length since this focal length offers optimum magnification and field of view for general viewing.
For a well-rounded selection of eyepieces, we recommend eyepieces with focal lengths of 5mm, 10mm, 15mm, 25mm, and 32mm as a good foundation.
Instead of acquiring these eyepieces individually, many optics manufacturers offer an assortment of eyepieces in one package. This is the easy, money-saving way to start your telescope eyepiece collection.
A good rule of thumb is to use eyepieces that are of comparable quality to your telescope. So if you own a state-of-the-art telescope, it's wise to spend a little extra on well-crafted telescope eyepieces to enjoy your telescope's full potential.