Opticron GS 665 - Manual (Page 2)

Getting Started
Your GS telescope will open up a whole range of new and exciting
impressions, whether for general use or specialist study. To focus at
different distances, simply turn the main focus wheel in conjunction
with the 9:1 ratio accurate focus adjuster until the image being
viewed becomes sharp. To minimise image shake caused by high
magnification the instrument should be supported using a suitable
tripod or mount connected via the tripod socket located on the
tripod sleeve. If the eyepiece being used has a fold down or
retractable rubber eyecup it 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. The retractable
lens hood should be extended when viewing in bright sunlight.
Care & Cleaning
To clean outer glass surface of the eyepiece and objective lens, gently remove excess dirt and dust using a compressed
air device or blower brush. Caution. Hard and persistent rubbing of dirty surfaces can cause abrasive scratches on the
surface of the glass which may distort viewing. Breathe on exposed glass surface and then wipe with an optical
cleaning cloth (code 30277) in a circular motion until the surface is clean again. Do not attempt to dismantle the
instrument as this will invalidate the guarantee.
WARNING. Never under any circumstances use a telescope to view the sun. Doing so will cause serious damage to
your eyes.
Whenever possible store in a stable dry atmosphere away from moisture. For extra protection, use the gift box or one
of the optional cases available.
Eyepiece
Rotating sleeve
and tripod socket
Main focus wheel
Specifications & Eyepieces
Retractable
lens hood
9:1 ratio accurate
focus adjuster
Waterproof Cases
Stay-on-the-scope waterproof in Black. Water resistant multi-layer padded cases individually
designed to fit each model. Protects instrument while fitted to a tripod and in use. Includes
removable end caps and adjustable carry strap.
Stay-on-the-scope waterproof in Green (angled models only). As Black models but supplied
with a fully adjustable neoprene carry strap for extra comfort.
Traveller semi rigid case (not illus). Manufactured from water resistant material with central zip
fastener, adjustable straps & loop attachments to carry a tripod.
Specifications 665 665/45 665ED 665ED/45
Product Code 40960 40961 40962 40963
OG Dia (mm) 66.5 66.5 66.5 66.5
Min Focus (m) 3.8 3.8 3.8 3.8
Length (mm) 326 326 326 326
Weight (g) 976 980 1049 1053
* 40934G eyepiece adapter required
EYEPIECES • SDLv2 • HDF • HR/HR2
Product Code 40936G 40810G 40809G 40858G 40860G 40861G 40862G 40930G 40931G 40933G*
Magnification 16-48x 18xWW 25xWW 35xWW 60xWA 80x 16-48x 21xWA 27xWA 18-54x
Field/1000m 41/25 50 47 35 19.5 12.5 42/20 49 39 38/20
Eyerelief (mm) 20-18 22 18 17 15 16 22-17 18 17 18-14