Getting Started
Specifications & Eyepieces
Your GS fieldscope will bring a new dimension to long range observation bringing far away subjects into clear and
sharp focus.
1. To minimize image shake caused by the high magnification, the instrument should be supported using a suitable
tripod or mount.
2. Connect the fieldscope to the tripod or mount using the tripod socket located on the underside of the tripod sleeve.
3. Make sure the eyepiece is attached securely. The retractable rubber eyecup should be used in the down position
when wearing glasses. This ensures the maximum available field of view is obtained. Be sure to return the
eyecup to the up position if you or anybody else wants to view without glasses.
4. To focus, locate the subject in the center of the field of view and rotate the focus wheel until the subject comes
into sharp focus. At high magnifications when depth of focus is shorter use the fine focus adjustment for greater
accuracy.
5. If you are using a variable magnification or zoom eyepiece set the magnification to minimum when trying
to locate your subject, only zooming once the subject is centered. With some eyepieces a small amount of
refocusing may be required as the zoom is adjusted.
6. The retractable lens hood should be extended when viewing in bright sunlight.
WARNING. Never under any circumstances use a fieldscope to view the sun. Doing so will cause serious damage to your eyes.
Warranty
Please keep this Warranty Card in a safe place
Model: ........................................................................................................................................................................
Serial No: .................................................................
Purchase Date: ...................................................................
Dealer ........................................................................................................................................................................
Opticron GS fieldscopes are of a very high quality both in their performance and construction and for your peace
of mind we offer a Premier Plus Limited Lifetime Warranty.
The Premier Plus Limited Lifetime Warranty covers all the optical and mechanical components as well as the
outer protective armor, but not accessories such as dust caps, objective lens covers etc. which are covered by our
Standard Warranty.
In the case of accidental damage or defects attributable to faulty parts or assembly we will assume responsibility
for the full costs of repair up to 5 years from the date of purchase. We reserve the right to decide whether defective
parts or products should be repaired or replaced.
For the next 15 years your product is covered for defects attributable to faulty parts or assembly and we will assume
responsibility for those costs only, charging labor costs to carry out the repair.
The Premier Plus Limited Lifetime Warranty does not cover loss, theft or deliberate damage to the instrument.
Registration
It is important you register your new purchase to activate your Premier Plus Limited Lifetime Warranty. To register
your product and activate the warranty please visit www.opticronusa.com/register and complete the form.
Premier Plus Limited Lifetime Warranties are available on new instruments purchased from participating dealers in
North America and are transferable. If you part with your instrument please make sure the new owner has a copy
of your original proof of purchase and re-registers their ownership at: www.opticronusa.com/register
Privacy
Opticron takes your privacy seriously and we do not share personal information with other companies.
Main Features
A Interchangeable eyepiece
(not included).
B Main focus wheel.
C 9:1 fine focus wheel.
D Tripod sleeve with +/- 90˚
rotation and large footprint
tripod adapter socket with
1/4” thread.
E Retractable lens hood.
A
B
D
C
Integrated rubber objective
lens cover.
E
Specifications
665 ED
665 ED/45
Code
Objective (mm)
Close Focus (ft/m)
Length (in/mm)
Weight (oz/g)
40962
66.5
12.5/3.8
12.8/326
37.0/1049
40963
66.5
12.5/3.8
12.8/326
37.1/1053
Eyepieces • SDLv2 • HDF
Code
Magnification
Field (ft/1000yd)
Field (m/1000m)
Eyerelief (mm)
40936G
16-48x
123/75
41/25
20-18
40810G
18xWW
150
50
22
40809G
25xWW
141
47
18
40858G
35xWW
105
35
17
40862G
16-48x
126/60
42/20
22-17
