SMC XW 3.5mm Eyepiece (1.25") NexStar 9mm Field Stop Diameter: 5

9mm Field Stop Diameter: 5

The improved precision polar scope maintains a fine engraved reticle

which can effectively reduce readout noise at high gain and allow the camera to maintain the same high dynamic range as it does at low gain

so they will be a little easier to use with the built-in guide cameras that ride along with some of the latest ZWO astro-cameras

SMC XW 3.5mm Eyepiece (1.25") NexStar 9mm Field Stop Diameter: 5Clear, comfortable viewing assured by 70 apparent angle of view and 20mm eye relief PENTAX XW series line up features an extra wide 70 degree apparent angle of view with an extra long 20mm eye relief to deliver an exciting wide perspective image. High grade optics for exceptional image quality The high performance XW series optics incorporates high refraction, extra low dispersion lanthanum glass elements to produce a well balanced image with minimal