Bausch & Lomb DISCOVERER 78-1600 User's Manual

Bausch & Lomb Sander User's Manual - DISCOVERER 78-1600.
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Discoverer®

15-60x60 Zoom Spotting Scope

Welcome to a world of adventure with your new Bausch &
L o m b® D i s c o v e r e r® Zoom  Spotting  Scope.  The  nature
student and sportsman who takes pride in optical quality can
make no better choice than the Discoverer Zoom 15x-60x
Spotting Scope. The Discoverer is one of the optically finest,
most versatile 60mm spotting scopes in the world. With the
D i s c o v e r e r, the user can scan an area with a wide, bright field
of view at 15 power and instantly zoom in for breathtaking 60
power close-up. The  Zoom  Power  Control  Ring  smoothly
increases or decreases the magnification as desired.  T h e
exterior body contains a unique rubberized surface providing
d u r a b i l i t y, noise reduction and a non-reflective surface.  T h e
following  directions  should  be  followed  closely  to  assure
sharp clear observations.

M O U N T I N G
The Discoverer’s tripod mount provides a convenient means
of fastening to any standard photographic tripod, car window
mount or shooter’s stand. For best viewing results, mount
your Discoverer on a firm support to prevent movement of
the scope. Movement makes the viewed scene appear to
dance or vibrate at high magnifications. Afirm mount will also
help you to locate, track and keep objects in the field of view.

LENS SHIELD
Unscrew and remove the lens caps from the objective lens
and eyepiece. The objective lens shield may be extended by
pulling it out from the end of the scope.

F O C U S I N G
The Discoverer used as a spotting scope will focus from 24
feet to infinity at any power setting with rotation of the Focus
Control Ring.

Make  sure  the  Telephoto  Adjustment  Control  is  turned
counter-clockwise as far as it will go.

The depth of field (visual distance over which the image is
seen in sharp focus), and the area covered, is greater at the
lower powers. However, if the instrument is initially focused at
a low power you may find that additional focus adjustment is
required as power is increased.

Some users may have difficulty re-focusing after zooming
rapidly to a higher power, this can be caused by the eye’s
inability to adjust quickly enough to the new magnification. It
will help to look away momentarily, then resume focusing.

USE WITH EYEGLASSES
By the use of its retractable eyecup, the Discoverer aff o r d s
the user the same eye relief (distance from the eye to the
eyepiece at which a full field of view is seen) with or without
eyeglasses. Turn the knurled eyecup clockwise for use with
eyeglasses  -  counterclockwise  for  normal  use.  Except  in
cases of astigmatism, most users will choose to remove their
glasses since the focus adjustment accommodates for near
and  far  sightedness  and  a  full  sight  picture  is  achieved
without disturbing side light. 

Power

FOV At 1000 yds               Exit Pupil

15x

156’

4.0mm

20x

11 7 ’

3.0mm

25x

93’

2.4mm

30x

77’

2.0mm

40x

58’

1.5mm

50x

47’

1.2mm

60x

40’

1.0mm

DISCOVERER SPECIFICATIONS

Power:  

15x to 60x

Objective Lens:

60mm

Eye Relief:

15mm

Length:

17.5”

Weight:

48 oz.

Eyepiece Lens

Power Control Ring

Focus Control Ring

Objective Lens

Extendable Lens Shield

Tripod Mount

Model #78-1600

Lit. #:  91-0209/03-01

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