4
For Alt-Az mounting, Tele Vue recommends the Gibraltar or
Gibraltar5 due to their sturdy legs. You will receive the necessary
attachment hardware and complete mount assembly instructions
with the mount. Tele Vue makes various adapter plates for popular
German equatorial mounts. Please consult your dealer.
The bottom of both mount ring systems have ¼-20 holes to
accept mounting studs or screws. The thread size in the accessory
groove is #10-32. Telescope balance in both systems is achieved
by unlocking the “bat handle” screws and sliding the tube fore or
aft. Once repositioned, retighten the bat handle screws.
3.0 Visual Observing Set Up
In order to use the scope visually, the 2.4” diameter of the draw-
tube needs to be reduced to 2”. This is achieved by installing the
included 2” Accessory Adapter. Note the three grooves with holes
machined 120° apart. The grooves will help index the holes in the adapter to the thumb screws in the
end ring. This will ease installation in the dark.
To install the 2” accessory adapter,
loosen the three end ring lock screws sufficiently
to remove any accessory that may be in place,
but do not retract them fully into the focuser body.
By allowing them to protrude into the body, they
act as locators. Insert the 2” Accessory Adapter
into the end of the focuser. If it does not go all the
way in, rotate the adapter. When the grooves in
the adapter align with the protruding screws, the
adapter will seat fully into the focuser. Tighten the
three screws a few turns so they enter the holes in
the adapter. The lock screws will now act against
the brass clamp ring in the 2” Accessory Adapter.
Slip a Tele Vue 2” Everbrite diagonal into
the focuser and tighten the lock screws. You will
now be able to reach focus with any Tele Vue
eyepiece.
IMPORTANT CAUTION: When replacing the orange plastic plug into the 2” Accessory Adapter, push
it in far enough to seat. Do not use the lock screws to clamp the plug in place as the clamp screws will
distort the brass clamp ring in the 2” accessory adapter.
3.1 Eyepieces
With its highly corrected wide, flat field and fast f/ratio, the NP101is puts eyepieces to the test. This
scope demonstrates the superiority of Tele Vue eyepiece performance and, with a range of 10x to 270x
(if the atmosphere allows) there is a magnification for all purposes. See chart at the end of this manual or
call Tele Vue for recommendations. In general, we suggest choosing low and medium power eyepieces
in ratios of field stop diameters. For example, factors of 1.4 or 2.0. When choosing higher power eye-
pieces, use ratios of magnification. (See reference chart in “Choosing Your Eyepieces”)
3.2 Finders
We particularly recommend using the Starbeam reflex sight (part# SFT-2003), which attaches to the Ring
Mount or Tube Rings. The case has a cutout for the Starbeam. The Quick Release Universal Finder Bracket
(QFM-1008) can hold a traditional 50mm finderscope and also attaches to the mount ring channels.
Lock Screws threaded
partially in to use as
guides for inserting
the 2” Accessory
Adapter.
RS4-8004 - Slotted for accessories, three
¼-20 tapped holes for attachment.
