Tele Vue 3X Barlow - 1.25"

Tele Vue 3X Barlow - 1.25"
Item # TE-BLW-3125
2 Questions(s)

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  • The Televue 3X Barlow Lens - BLW-3125 uses only multi-coated high-index optical glass.
  • Superior contrast and exceptional light transmission.
  • Televue Barlow Lens - BLW-3125 offers 3X magnifying power!
  • Accepts all 1.25" focusers, diagonals, eyepieces and accessories.
  • Weighs 7 ounces and measures 5" in length.


Televue 3X Barlow - 1.25"

If you don't compromise optical quality when it comes to your telescope's eyepieces, why should you compromise with a barlow lens? Thanks to Televue's innovative 2-element design, now you can get superb sharpness that matches the performance of Tele Vue eyepieces. The Televue BLW-3125 3X Barlow is an achromatic system, but the design gives better color correction over its competitors at the edge of field. Optically corrected down to f/4 for use with fast f/ratio reflectors, the Televue BLW-3125 3X Barlow is parfocal with TeleVue Plossls under 32mm, and provides excellent performance with any scope type.

The Televue 3X Barlow - 1.25" is fully multi-coated, with blackened lens edges and internal anti-reflection threading for excellent contrast. Its 3.75" length allows the Tele Vue 3X Barlow to be used in star diagonals and what's more, the barrel is threaded for standard 1.25" filters. As a unique feature, the Televue 3X Barlow has a safety groove. Have you ever dropped a thumbscrew in the dark? No more. The Televue BLW-3125 has a captive thumbscrew which helps hold the Barlow in place should the focuser thumbscrew accidentally loosen!

Because the Televue 3X Barlow - 1.25" measures 5" in length, it is marginal for use in star diagonals. With physically long eyepieces, this doesn't create an optical problem, but be aware an inexpensive diagonal may not keep the combination secure. The weight of a large eyepiece and this barlow can cause the diagonal housing to become loosened in the visual back and allow it to shift or turn without warning. Proper prior knowledge can avoid these problems.

As Al Nagler says:

"Televue's Barlows were envisioned as magnification windows. Multi-coated high index glasses assure optimum aberration correction, exceptional contrast and virtually no light loss. Televue Barlows achieve their design goals even when tested by the fastest scopes. They even improve our competitor's eyepieces and telescopes!"

Televue 3X Barlow - 1.25" Features

  • Internal safety groove and captive thumbscrews!
  • Blackened lens edges and internal anti-reflection threading.
  • Parfocal for most TeleVue Plossl eyepieces.
  • Five year TeleVue warranty.
Tele Vue Part Number: BLW-3125
Additional Information

Additional Information

Barrel Size 1.25"
Magnification 3X
Manufacturer Tele Vue
Warranty Lifetime Warranty
Included Items

Included Items

  • 3X - 1.25" Barlow Lens
  • Protective Caps
  • Five Year TeleVue Warranty
Questions & Answers

Product Questions

Does this barlow unthread at the base of the eyepiece holder and the chrome barrel, like the Televue powermate series, there by allowing a DSLR camera to be directly attached with the proper T-ring and adaptor? And would this lash-up work in conjunction with a PST Coronado scope for focus and full disk of the sun??
I want to use a barlow for magnification for my t-mounted camera on a 900mm refractor - is this one suitable, assuming I need a t-mount adaptor on the end?
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