16
USING 1.25-INCH EYEPIECES
BASICS FOR YOUR
ZHUMELL DOBSONIAN TELESCOPE
1.
The 1.25-inch is the most commonly used eyepiece format. The
measurement of 1.25 inches is the diameter of the eyepiece tube,
measured on the chrome side.
2.
The eyepiece holder and Crayford focuser come already attached to the
optical tube, next to where the finderscope is mounted.
3.
Remove the plastic dust cover from the eyepiece holder.
4.
Loosen the silver thumbscrew closest to the eyepiece hole. (It is part of
the 1.25-inch adapter. More on this adapter in the 2-inch
eyepiece section.)
5.
Take out your 1.25-inch eyepiece. Remove the plastic covers and pull
up the rubber to use the eyecup.
6.
Slide the chrome end of the eyepiece into the eyepiece holder.
7.
Tighten the bottom thumbscrew to hold eyepiece in place.
8.
View through the eyepiece and focus as needed. (See focusing section.)
9.
To remove the eyepiece, loosen the silver thumbscrew.
10.
To remove, loosen the thumbscrew and pull the eyepiece out of
the focuser.
11.
Use the plastic dust covers to protect the eyepiece and focuser
during storage.
