Founder Optics Bino-One Binoviewer, Eyepieces & Hard Case - BOV1.25 Astrophotography Mounts Speers-Waler Eyepiece is a superb

Speers-Waler Eyepiece is a superb quality eyepiece with a focal length of 25 mm and an AFOV of 74°

Diopter adjustment allows for refinement of image to correct for any differences in strength between the users own eyes

Optical Tube not included

even in short focus telescopes

During the final primary mirror collimation

Founder Optics Bino-One Binoviewer, Eyepieces & Hard Case - BOV1.25 Astrophotography Mounts Speers-Waler Eyepiece is a superbFounder Optics Bino One Binoviewer & 2 Eyepieces The Founder Optics Bino One Viewer is an amazing binoviewer designed for 3D views! Enjoy viewing comfort and spectacular views through this innovative binocular viewer, designed to connect to a wide array of spotting scopes or telescopes! Two 12. 5 mm Alien 55 FOV eyepieces are included, but you can switch the eyepieces out for a change in magnification whenever you like by just adding another set when