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Antares 1.25" 1.5x Barlow Lens with Twist-Lock Adapter and T-Thread # UB1.5STL

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Brand Antares
Part Number UB1.5STL

Product Info

Manufacturer Description

This high performance Antares barlow # UB1.5STL will multiply the power of any inserted eyepiece by a factor of 1.5x. It features a fully-multicoated achromatic design. This short barlow will work in diagonals or reflectors, has has internal darkening and edge-blackened lenses. Suitable for high contrast, medium power applications in any telescope. Threaded to accept standard 1.25" astronomy filters. Made in Canada.

This barlow features an integrated twist-lock adapter / clamping mechanism to securely center and hold your eyepiece. The inner compression ring is made of polypropylene and will not mar your eyepieces. Unscrewing the twist-lock ring exposes a standard male T-thread (M42x0.75) underneath which can be used to couple imaging devices with the barlow.


  • Barrel size: 1.25" / 31.7mm
  • Magnification factor: 1.5x
  • Type: Achromatic
  • Coatings: Fully multicoated
  • Clear aperture = 1.01" / 25.7mm
  • Weight: 5.7oz / 162g
  • Total length: 3.23" / 82.4mm
  • Length of lower chrome barrel: 1.48" / 37.6mm
  • Length of upper black barrel: 1.77" / 44.8mm
  • Filter threads: Yes (standard 1.25" filter threads, M28.5x0.6)
  • 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.


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