The SV138 is made of high-quality prisms, which greatly improves the transmission of transmitted light compared to other glass materials, enriching the saturation and contrast of image colors.

Wide 45 degree angle makes you view correct image from telescope stand and just look down with a comfortable angle.

Correct upside down and left-right reversed image easily, which allows view things during daytime in correct position.

Suitable for most refractor astronomical telescopes;Not recommended for use in Newtonian reflector or Dobsonian reflector telescopes.

When you fix the eyepiece, the eyepiece is more evenly loaded and will not cause accidental scratches on your expensive eyepieces.

CNC Manufactured, aluminum alloy housing and stainless steel cover.