Televue 2.0x BIG Barlow 2"

Properly designed Barlows do wonderful things: They amplify power, slow the telescope\'s f/# (improving eyepiece sharpness), and give designers the opportunity to compensate for eyepiece aberrations.

Tele Vue Barlows use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f/4 scopes. They even improve our competitor\'s eyepieces and telescopes!

Compromise image quality in any part of the optical chain and you\'ve compromised every part! Tele Vue product design and execution deliver consummate satisfaction. Every Tele Vue Barlow must pass the same rigorous f/4, full field testing as all our eyepieces. All Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories.

Offered in 2x and 3x magnifications, these 1¼\" Barlows perform identically. Simply choose either or both based on your eyepiece collection. Features include parfocal-ization, 1¼\" filter threads, captive lock screws that won\'t fall out and full multicoatings.

Offered in a 2x magnification, the Big Barlow is ideal for Newtonian scope owners. It will be parfocal with both 2\" and 1¼\" eyepieces in this application. Features include 1¼\" eyepiece adapter, threads for 48mm filters, captive lock screw and full multi-coatings.

Note: The Big Barlow is not recommended for use with 2\" diagonals because it\'s length prevents it from being parfocal. With some telescopes, focus might not be reached, particularly when the interface lens is also used with it. A far better approach with no potential problems in any scope or with any eyepieces is to use the 2\" 2x Powermate (PMT-2200), which essentially includes the Pan-Barlow Interface.