TeleVue 2x Barlow BLW-2125 are designed to amplify power, lengthen the telescopes f ratio (improving sharpness) and help to correct for aberrations. Most importantly for eyeglass wearers, a TeleVue 2x Barlow BLW2125 increases the magnification of long eye relief eyepieces.
TeleVue 2x Barlow BLW-2125 and TeleVue 3x 1 1/4" barlow offer parfocalization (no need to refocus when switching eyepieces) and are fully multicoated. TeleVue Barlows also feature filter threads and captive lock screws.
Specifications for TeleVue 2x Barlow BLW2125: