TeleVue  2x 2" BIG Barlow lens 

Product description

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!

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, which essentially includes the Pan-Barlow Interface.

Specifications
Capacity
Magnification factor
2
Connection (to the telescope)
2"
Coating of optical system
multiple
Number of lenses
2
Ring clamp
yes
General
Weight (g)
340
Type
Barlow & Erecting Lenses
Type of build
Barlow Lens


Product safety
Manufacturer: Tele Vue Optics, Inc., 32 Elkay Dr., NY 10918 Chester, US, www.televue.com
Responsible person: NIMAX GmbH, Otto-Lilienthal-Str. 9, 86899 Landsberg am Lech, DE, info@nimax.de