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Product Features

  • Focal length;0.16" 4mm;offer high magnifications;look more closely and more detailed at the moon's surface and other planet;perfect for viewing the moon and planets
  • Standard 1.25'' 31.75mm fitting diameter;can be used in any astronomical telescope with a 1.25" focuser;Perfect for broad field lunar observations; medium sized star clusters;and a wide range of cloudy nebulas and deep sky targets
  • Fully coated optics glass eyepieces for excellent image contrast and light transmission;give maximum detail and definition across the entire field of view;highly achromatic;planetary filters enhance details on Jupiter;Saturn;Mars and Venus
  • 4mm lens only weighs 0.09lb; For lenses with the same refractive index; the 62 degree aspheric eyepiece is thinner and lighter than the spherical eyepiece;designed primarily for planetary observation;perfect for deep sky objects
  • Wide angle; 4mm 62 degree aspheric eyepiece can get maximum detail and definition across the entire field of view; Anti-lost design; Eyepiece interface recess portion can prevent the loss;Applicable;watch the scenery;bright celestial observations; nebula and so on


SVBONY 1.25" fully coated eyepiece is perfect for broad field lunar observations medium sized star clusters and wide range of cloudy nebulas;deep sky targets

New to star gazing and didn't know what you need to satisfy your needs;here is something can help you make an educated decision;things to consider:

Make sure that you know your telescope and how to calculate the optimal magnification for the objects you wish to view;the magnification equation:Magnification=objective focal length/eyepiece focal length

Typiy;you do want to exceed 50x per inch of your telescopes diameter or the images will be blurry;for example;you have an 8" lens you get 8x50=400x

So research what the best magnification is for the objects you wish to view

62 degree apparent field of view:
Ultral wide angle for maximum detail and definition across the entire field of view;gets a virtually distortion free image

Fully coated optical lenses:
FMC glass optics increase light transmittance;enhance details on jupiter;saturn;Mars;venus and get high achromatic images

The structure of the optical system:
Aspheric eyepiece designed primarily for planetary observation and perfect for deep sky objects

Standard 1.25" fitting diameter:
Fits for any astronomical telescope with standard 1.25" focuser;perfect for broad field lunar observations

4mm Focal length:
Suitable for lunar observation holes;look more closely detailed at the moon's surface and other planet;perfect for viewing the moon and planets

Watch the scenery;bright celestial observations;nebula;broad field lunar observations;medium sized star clusters;cloudy nebulas and deep sky targets;viewing the moon and planet and so on

Pay attention:Don't look directly into the sun;otherwise it will burn the eyes

Package includes:
1xSVBONY 4mm eyepiece

SVBONY Eyepieces 4mm Telescopes Lens Wide Angle 62 Degree Aspheric Eyepiece HD Fully Coated Lens for 1.25 inches Astronomic Telescopes




Item Weight:0.15 pounds


Item Dimensions:1.57x1.57x2.95 inches

PROP 65 WARNING: This product can expose you to some kind of chemical, which is known to the State of California to cause cancer. For more information, go to

Filed under: Eyepieces & Accessories