A Barlow lens offers an easy, economical way to increase the magnification of an eyepiece.
A 2x Barlow lens doubles the magnifying power of an eyepiece by doubling its effective focal length. For example, an 10mm eyepiece used with a 2x Barlow lens would have the magnifying power of a 5mm eyepiece. It is like having two eyepieces in one! If you are looking for an affordable way to achieve high-power viewing of the moon, planets and even close-up views of terrestrial objects.
Designed to fit into a standard 1.25" eyepiece tube.
A very useful accessory.
x2 Sky-Watcher 1.25" Economy Barlow (Single Lens) Product Code 475
x2 Sky-Watcher 1.25" Deluxe Barlow (Double Lens) Product Code 364
x2 Sky-Watcher 2" Super-Deluxe ED Barlow (with 1.25" adaptor) Product Code 966
NB. The x2 'TAL' Barlow and The x3 'TAL' Barlow Lenses are now discontinued.