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Barlow lens
Dear Friends,
I've a simple made home refractor telescope with the details below:
1- The large lens of 10 cm dia. and 35 cm focal length.
2- The smal lens of 1 cm dia. and 1 cm focul length.
I'd like to increase the amplification power of the telescope using a biconcave lens which got it from taking apart of a compound lens , the diameter of this biconcave lens is 3 cm.
Please advice me if this lens is suitable to be used as a barlow lens and also, advice me how to compound it with eyepiece to make a barlow lens?!..
Waiting for kind help
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