Bresser National Geographic 70/400 Mode D'emploi page 15

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Abb. 2
How to insert an eyepiece
Barlow Lens
Connect the telescope tube (8) to the tripod head (Abb. 2). Use the
Fixation screw for the Telescope tube (12) to firmly connect both
parts.
Take the lens cap off the eyepiece holder (2). You can
now place the amici prism (3) into the eyepiece holder
and secure it with the small screw on the connector.
Next, set the eyepiece (5) into the opening of the ami-
ci prism (3). Here too, there is a screw with which you
can screw the eyepiece onto the amici prism.
Note: First, put the eyepiece with the largest focal
width (e.g. 20 mm) onto the amici prism. While you'll
get the least amount of magnification, it will be easier
for you to view things.
Optional: The Barlow lens can be mounted between
the amici prism and the eyepiece to further triple the
magnification.
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