Tele Vue Eyepiece Barrel Extension (2") Celestron 52308 Comfortable Headrest

Comfortable Headrest

The microstep select (MS1 and MS2) pins of the A3967 are broken out allowing adjustments to the microstepping resolution

and tight spaces

even when sharing the drive with others

5x ( with the PF-65ED ) Angle of View 1

Tele Vue Eyepiece Barrel Extension (2") Celestron 52308 Comfortable HeadrestThreads on to 2" Filter Threads Adds Path Length Made in the USA With certain eyepiece telescope combinations, it may be necessary to add this Tele Vue Eyepiece Barrel Extension accessory to achieve necessary path length for proper focus or lack of interference. This eyepiece barrel extension threads on to a 2" eyepiece's filter threads, and can make some eyepieces parfocal with other eyepieces ( the Nagler 12mm becomes parfocal with the Nagler 17mm &