1.2-Element optics are fully multi-coated
2.The Edges of the lenses are blackened to cut down on internal reflections
3.The 1.25” barrel will fit in standard 1.25” focusers and diagonals
4.Internal brass ring that the set screw hits to hold your 1.25″ eyepiece inside for eliminates marks on your eyepiece barrel

SV137 1.25 inch 3x Barlow Lens triple the power of any 1.25 inch telescope eyepiece it’s used with. High magnification for eyepieces to see more details of the moon and other planet
Ideal for high power observation

Provide a high power magnification
SV137 1.25″ 3x achromatic barlow lens SVBony effectively triples the magnification of each eyepiece,allow you look more closely and more detailed of your observation target

Metal body and rubber grip ring
Durable metal for extended product life;Precision machined;sturdy for a long term use.Non-slip rubber grip ring design makes it not easy to drop even with gloves on

Brass compression ring
A brass compression ring just inside the top of SV137 barlow grabs your eyepiece gently but firmly when you turn the screw. Once the screw has been secured in place, the brass ring keeps your eyepiece in the Barlow instead of relying on the tip of the screw itself, protecting the barrel from scratches

Outstanding optics
Double-glued lens set and Full-bandwidth multi-coated lenses for excellent transmission.Fully multi-coated lens made of high index glass deliver sharp, high contrast vistas,can give you excellent aberration correction

Insert Barlow Lens between your eyepiece and your telescope to get the magnification instantly. Eye relief is the distance your eye has to be from the first lens in the eyepiece in order to see the full field of view. When you use a Barlow lens with an eyepiece, you get the magnification, but the eye relief is not affected. This is a good thing, because normally the shorter the focal length of the eyepiece, the less eye relief you have.