Item Type: Telescope Eyepiece <br>Material: Optical glass, plastic, metal <br>Gross Weight: 414g/14.6oz <br>Interface Specifications: 2in <br>Focal Length: 27MM/1.1in <br>Field of View: 52 degree <br>Exit Pupil Distance: 13MM-18MM / 0.51in-0.71in <br>Lens Coating: FMC<br>1、Strong Versatility: This telescope eyepiece has 2 inch standard interface, which is suitable for 2inch astronomical telescopes, and can be purchased additionally with astronomical telescope filters as needed. <br>2、Large View: 27MM focal length, 52 degree large field of view, comfortable viewing, easy to find targets, and can watch a wider range of nebulae, star clusters, landscapes, the surface of the moon, etc. <br>3、Optical Glass: The lens adopts premium optical glass, FMC coating process, small chromatic aberration, high light transmittance, low dispersion, clear image. <br>4、Metal Lens Barrel: The lens barrel is made of premium metal material, which is sturdy and durable, with internal matting treatment to reduce reflections. <br>5、Folding Eye Shade Design: This astronomic telescope eyepiece adopts folding eye shade design, and you will not easy to get tired after watching for a long time.1 x <br> <br>Telescope Eyepiece<p>2 x Dust Proof Cover</p>