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Televue 3x Barlow 1.25 inch (1-1/4 in.)

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Tele Vue 3x 1.25" Barlow 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. Barlows
Concept: I originally designed the Tele Vue Barlow line to complement the high
performance of our eyepieces. Only 2 elements of high index glass were
required to reduce all aberrations to well below the airy disc in an f/4
system. It has taken a good 15 years, but I think we're finally laying to rest
the popular myth of the "degrading Barlow." In a 1997 Sky & Telescope review,
Terrence Dickenson wrote "...Technology has erased the old objections. A
modern Barlow will not degrade your telescope's optics. Anyone telling you
otherwise is using outdated information. Moreover, the highly regarded Nagler
eyepieces and their clones have built-in Barlows - ample evidence that the
lens is not some detrimental intruder." Thanks Terry, I couldn't agree more.
Al Nagler 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 lightloss. Observed performance is aberration free,
even

Main Points

  • Package Dimensions: 5.6 x 2.3 x 1.9 inches
  • Item Weight: 8 ounces
  • Shipping Weight: 8.8 ounces
  • Item model number: Barlow
  • Tele Vue 3x Barlow Lens, 1.25".

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