TeleVue 4x Powermate PMT-4201 is a compact, high power, fully corrected image amplifier. Tele Vue Powermate line consists of a negative doublet plus a positive "pupil-correcting" doublet. TeleVue Power Mate 4-element system provides the magnifying function of a TeleVue Barlow without its limitations by restoring the field rays back to their original direction, as if the TeleVue Powermate were not there. The result is a pure magnification increase.
TeleVue 4x Powermate features include 1 1/4" adapter, brass clamp rings and filter threads. TeleVue 4x Powermate accepts TeleVue PTR-4201 T-Ring Adapter.
Specifications for TeleVue 4x Powermate PMT4201: