Tele Vue 2.5X Powermate - 1.25" - PMT-2513 13mm Eyepieces this is a critical difference
Tele Vue 2.5X Powermate - 1.25" - PMT-2513 13mm Eyepieces this is a critical differenceAbout the TeleVue 2. 5X Powermate 1. 25" To understand the TeleVue Powermate, we must first understand the Barlow lens. Barlows amplify the power of a telescope. They can be considered "focal reducers" for eyepieces, or "focal extenders" for objectives. Terence Dickenson, in his Barlow test report in Sky and Telescope, says: "Technology has erased the old objections. A modern Barlow will not degrade your telescope'''s optics. Anyone telling you
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