Triple Barlow lens in a 1.25 "frame made of low dispersion glass (ED), minimizing the effects of chromatic aberration.
The basic benefit of using Barlow's lenses is that they allow you to limit the number of glasses while providing a large span of available magnifications. For example, having 2 glasses with 30 and 15 mm focal lengths, using the Barlowa 3x lens we get an additional two magnification corresponding to 10 and 5 mm focal length lenses. In addition, the Barlow lens does not change the eye- shadow offset of the eyepiece ( eye relief ), allow you to focus farther away from the tube (when you have a problem with sharpening the image) and allow you to lengthen the focal length when shooting the sky at the focus of the lens by multiples the equivalent of the Barlow lens (2x, 2.5x, 3x, 5x). | • Multiplicity: | 3x | | • Diameter of binding: | 1.25 inches | | • Anti-reflective layers: | FMC |
2 years
HOW TO FIX THE LIGHT TELESCOPIC LENS
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