Astromania 1.25" 15mm 66-Degree Ultra Wide Angle Eyepiece - Bundle with - 1.25" High Precision Double Helical Focuser with 0.05mm scalev

• For guider scope or finder scope interface. solution for telescopes or telephoto lenses with sluggish focusing. fixed orientation so no rotation of mounted cameras or eyepieces or field of view with guide star when focusing Upgrade your R and P focuser by adding it to the end of the R and P focuser by using "Astromania M42X0.75 Female to M42X0.75 Female Thread Telescope Adapter - 9mm". note: please make sure that there is M42X0.75 male thread on your R and P focuser Interface: 1.25 inch with M42X0.75 male thread. primary Mirror Interfaces: M31X0.5/M42X0.75. accuracy 0.05mm. Focusing stroke: 10mm. Minimum length: 46mm. Longest length: 56mm Wide 66-deg apparent field offers expansive views of the moon. star clusters. and the Milky Way. generous 13mm eye relief allows comfortable viewing distance and lets eyeglass wearers see the entire field of view 15mm eyepiece offer wide field of view and superior performance. 4-element design deliver sharp image with good color correction and contrast. aluminum 1.25 inch barrel is internally blackened to eliminate light scattering. thread accept 1.25 inch filter