Meade 2080 - Viewfinder: Model 2080

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speaking, the lowest usable power is approximately 4X per
inch of telescope aperture, or about 32X in the case of the
8" aperture Model 2080, about 40X in the case of the 10"
Model 2120.' During the daytime, when human eye pupil diameter
is reduced, the minimum practical power with the Model 2080
is increased .to about 60X, or to about 75X with the Model
2120; .powerslower than this level should be avoided during
daytime observations. A reasonable.magnification range for
daytime terrestrial observations through the Model 2080 is
from about SOX to 190Xi through the Model 2120, from about
100X to 200X.
Accessories are available both to increase and decrease the
operating eyepiece power of the telescope. See the sections
of this manual on "The Barlow Lens" and "Wide Field Adapter
S.ys tem. "
THE VIEWFINDER: MODEL 2080
The standard 6 x 30mm Viewfinder is shipped in its mounting
bracket with each Model 2080 telescope. Mounting screws for
-the viewfinder bracket have been threaded into the top of
the main telescope's rear cell, at the hole-positions where
the viewfinder bracket will be seated. S~e Fig. 2A.
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To attach the viewfinder, remove the 2 viewfinder mounting
screws from the rear-cell, using one of the he~ wrenches
provided with the telescope; place the viewfinder-with-
bracket over these mounting holes, and then replace the 2
mounting sc.rewsto securely attach the viewfinder bracket
to the rear-cell. Tightening these mounting screws to a
"firm feel" is sufficient; avoid over-tightening, which
might cause the rear-cell threads to strip.
WARNING: Never use set 'screws on any part of the optical
tube assembly, except those factory-supplied set screws
included with the basic telescope or with optional acces-
sories.. Longer, ~on-standard set screws may protrude too
far into the optical tube and cause serious damage to the
primary mirror.
The 6 x 30mm Viewfinder has been factory pre-focused at
infinity. Should this focusing need adjustment for your
eyes, loosen the knurled collar at the objective lens-end
of the viewfinder (see (3), Fig. 2A), enabling rotation
of the objective lens cell, forward or backward, for precise
focusing. Then tighten down the knurled collar against the
objective lens cell, to lock the focus in place. Note that
no focusing is possible, or necessary, at the eyepiece-end
of the viewfinder.