Installing & Using The Barlow Lens; Aligning The Finderscope - Celestron PowerSeeker 21007 Instruction Manual

i u
nSTalling and Sing The
Your telescope comes with a 2x Barlow Lens which doubles
the magnifying power of each eyepiece. However, the
greatly magnified images should only be used under
ideal conditions.
To use the Barlow lens, remove the diagonal and insert
the Barlow directly into the focuser tube – Figure 13 after
removing all caps. You then insert an eyepiece into the
Barlow lens for viewing. You can also, insert the diagonal
into the Barlow lens and then use an eyepiece in the
diagonal but you may not be able to reach focus with
all eyepieces.
note: Start by using a low power eyepiece as it will be
easier to focus.
i u
nSTalling and Sing The
Your telescope comes with a 1.5x erecting eyepiece, used
primarily for daytime terrestrial viewing. This eyepiece
corrects the image you see in your telescope so that it's
both right side up and corrected from left to right. Install
and use this eyepiece the same way you do with the
Barlow Lens in the section above. You cannot use the
Barlow lens when using this erecting eyepiece and you
should not use the diagonal.
a f
ligning The inderScoPe
Use the following steps to align the finderscope so that
you can find objects easily at its 2x power.
1. Remove the lens caps from both ends of the
finderscope.
2. Locate a distant daytime object and center it in a low
power (20 mm) eyepiece in the main telescope.
3. Look through the finderscope (the eyepiece end of the
finderscope) and take notice of the position of the
same object.
4. Without moving the main telescope, turn the
adjustment thumb screws located around the
finderscope bracket until the crosshairs of the
finderscope are centered on the object chosen with
the main telescope. Once the crosshairs of the
finderscope are centered on the object chosen with
the main telescope, the finderscope is now
properly aligned.
b l
arlow enS
1.5 e e
x recTing yePiece
Barlow lens
When using the erecting eyepiece, the power with various
eyepieces is:
50 mm with 20 mm eyepiece = 38x
50 mm with 8 mm eyepiece = 94x
40 mm with 20 mm eyepiece = 30x
40 mm with 8 mm eyepiece = 75x
Eyepiece
f 13
igure
f 14
igure
Adjustment Screws
Objective
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