Dismiss Notice
New Cookie Policy
On May 24, 2018, we published revised versions of our Terms and Rules and Cookie Policy. Your use of AstronomyConnect.com’s services is subject to these revised terms.

More Views

Antares 1.25" 3x Barlow Lens # B3S

No Reviews (0 Reviews) Read Reviews Write Review
Brand Antares
Part Number B3S
Availability available

Product Info

Manufacturer Description

This high performance Antares barlow # B3S triples the power of any inserted eyepiece. It features a fully-multicoated achromatic design, internal darkening and edge-blackened lenses. Suitable for high contrast, high power applications in any telescope, although it is best suited to Newtonian/Dobsonian reflector telescopes because of its rather long length. Not threaded to accept standard 1.25" astronomy filters. Made in Canada.


  • Barrel size: 1.25" / 31.7mm
  • Magnification factor: 3x
  • Type: Achromatic
  • Coatings: Fully multicoated
  • Clear aperture = 1" / 25.3mm
  • Weight: 3.2oz / 91g
  • Total length: 4.48" / 113.9mm
  • Length of lower chrome barrel: 1.55" / 39.4mm
  • Length of upper black barrel: 2.94" / 74.6mm
  • Filter threads: No
  • End caps: Yes (2) but subject to change without notice
  • Country: Made in Canada

Note that the use of any optical element like barlows and focal reducers changes the focus point of your telescope, requiring additional in-focus or out-focus travel. The exact amount of focus travel required will depend on the optics and mechanics of your specific set-up (telescope, diagonal (if used), barlow, and eyepiece). Hence, be aware that you may not be able to reach focus with all eyepieces or in all configurations with a given barlow.


Not yet rated. Be the first to Write a Review