The 5x Powermate is TeleVue's most powerful tele-extender, and is most commonly used for planetary imaging applications. TeleVue went beyond the Barlow concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate consists of a negative doublet plus a positive pupil-correcting doublet. This 4-element system provides the magnifying function of a Barlow without its limitations by restoring the field rays back to their original direction, as if the Powermate |
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