If you own a telescope, you must know what is a Barlow lens. It’s invented by Peter Barlow (1776-1862), an English writer on pure and applied mathematics. Barlow lens is a concave lens which is place between the primary mirror of telescope and eyepiece to increase the magnification of the eyepiece which is currently used.
A 2X Barlow lens is widely found in the market. It doubles the magnification of your eyepieces, thus it’ll double your collections of eyepieces. It saves your money! When you choose your Barlow lens, you must select the Barlow lens which is same with your eyepieces in barrel sizes. For my LX90, it uses the 1.25″ format of barrel size.
If you can manage to buy a Barlow lens with better coating, go for it! It’s because if the light transmission of the Barlow lens is bad, increasing the magnification just doesn’t worth it.
Where to put the Barlow lens? It’s quite simple to use the Barlow lens indeed. First, install the eyepiece holder. Afterthat, drop in the Barlow lens and following by the eyepiece. Then, you got it!
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