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Tele Vue 2x Powermate, 2" Image Amplifier Review

I've owned a few barlows in 40+ years of observing, but the Powermate beats them all and exceeds expectation. "OMG", crisp and transparent imagery with every occular used! It greatly improves field distortion in my f/6 Orion refractor, making photography possible with the scope and lenses I already own.

Tele Vue 2x Powermate, 2" Image Amplifier Feature

• Vignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized.
• Telecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays). This is ideal for Hydrogen-alpha filter use such as with Daystar models.
• High performance for image amplification, CCD or film (some of the finest Earth-based planetary imaging is being done with Powermates).
• Flexible for visual and imaging with all types of telescopes and eyepieces. Essentially Parfocal, and with nearly constant magnification regardless of image distance behind top surface (except 5x model which increases 1x for every 35mm of image distance increase).
• Higher magnifications are possible with high optical performance compared to "doubling up" Barlows.

Tele Vue 2x Powermate, 2" Image Amplifier Overview

This model is nearly parfocal (unlike the Big Barlow / Interface combination), so it can be effectively used in our 2" diagonals. Its performance is excellent with every 1¼" or 2" eyepiece we make (yes, even the 31 Nagler Type 5!). Both the 2" eyepiece holder and the special 2"-1¼" low-profile adapter use brass clamp rings for secure, non-marring operation. And it also has a very unique feature: you can unscrew the 2" eyepiece housing and screw on a special T-ring adapter for solid, compact attachment of CCD or camera equipment.

Tele Vue 2x Powermate, 2" Image Amplifier Specifications

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*** Product Information and Prices Stored: Jul 24, 2010 01:30:03

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