Tele Vue 4x Powermate, 2" Image Amplifier

Tele Vue Barlows: "An Optically Perfect Window " Properly designed Barlows do wonderful things. First, they amplify power while retaining the eyepiece's eye-relief. Second, they slow the telescope's f/#, which improves eyepiece sharpness. Third, the designer can introduce compensations for eyepiece aberrations. The 4x Powermate Barlow is a 4-element parfocal, compact amplifying lens system. POWERMATE consists of a negative achromatic doublet plus a positive "pupil-correcting" doublet. While it looks and functions like a Barlow, your eyepiece will operate with pupil locations where the designer intended, avoiding mismatch problems. POEWRMATE optimally mates its power to your eyepieces. No additional "interface lens" is needed, since POWERMATES have it built-in. In addition to full multi-coating, POWERMATE includes other Tele Vue special touches such as a safety undercut on the chrome barrell, and captive lock screws that can't fall out. Tele Vue's 100% QC program at f/4 insures that POWERMATE will add dramatic power (and NOTHING ELSE) to your favorite eyepieces. If, for example, you own a 22mm Panoptic, you'll have the power of a 5.5mm with the 4x POWERMATE! The 2" 4x POWERMATE is threaded for 48mm filters. Dobsonian/Newtonian owners using Tele Vue's Paracorr coma corrector should place the 2.5x or 5x POWERMATE (or Tele Vue 2x or 3x 1-1/4" Barlows) into the Paracorr's 1-1/4" adapter (i.e., between the Paracorr and the eyepiece). For 4x POWERMATE (or Tele Vue 2x Big Barlow), first insert the 4x POWERMATE into the focuser, then the Paracorr into the 4x POWERMATE

SUPERIOR IMAGE QUALITY - Experience exceptional image clarity and contrast thanks to Tele Vue's advanced optical design minimizing aberrations and distortions for true-to-life views. VERSATILE COMPATIBILITY - Seamlessly integrates with 2" telescope focusers and includes a 1.25" adapter ensuring compatibility with a wide range of eyepieces and telescope setups. ROBUST CONSTRUCTION - Built to last with high-quality materials and precise engineering the Tele Vue Powermate ensures durability and reliable performance for years of astronomical use. OPTIMIZED LIGHT TRANSMISSION - Benefit from fully multi-coated optics that maximize light throughput delivering brighter and sharper images even at high magnifications for optimal viewing. SECURE EYEPIECE MOUNTING - Features brass clamp rings that gently secure your eyepieces preventing marring and ensuring a firm centered hold for stable and precise focusing during observations.