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.
- Additional Information
SKU TE-BLW-3125 Barrel Size 1.25" Magnification 3X Manufacturer Tele Vue Warranty Lifetime Warranty
- Included Items
- 3X - 1.25" Barlow Lens
- Protective Caps
- Five Year TeleVue Warranty
- Questions & Answers
Product QuestionsI 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?Question by: spiderbrad58 on Nov 3, 2014 5:36:39 PMYes, assuming you have the 1.25" to T2 mount adapter as you noted and you have enough extension tubes between the scope and the barlow (or are using a 2" diagonal) to bring it to focus, this will work to increase the magnification and f/stop of the telescope it is attached to by approximately 3x with a DSLR or CCD camera (changing the barlow to camera distance will affect the magnification). A TeleVue Powermate will have a flatter field than this barlow, but it comes in 2.5x and 5x in 1.25", not 3x.Answer by: Chris (Admin) on Nov 6, 2014 9:26:19 AM
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