Opticron ES User Manual

Telephotography

Telephotography using SLR cameras (digital or film). In this system

the camera lens is substituted for the telescope + telephotoadapter or
telescope + eyepiece + photoadapter. To convert your ES fieldscope
into a telephoto lens (ES 80 950mm
you will need a 40215 telephotoadapter. Alternatively connect a
suitable push fit photoadapter to your viewing eyepiece.
is required to connect the assembly to the camera body.

Notes. Focusing is facilitated on the telescope. Camera may need to be operated in
manual mode with shutter locks disengaged where necessary. The high magnification to
aperture ratios result in slower shutter speeds compared with conventional telephoto
lenses so choose an IS0 setting of 400. For 35mm SLRs 400 ASA film is recommended. If
possible use a cable release or remote control to reduce camera shake when operating
the shutter.

1

This is an approximate figure based on 35mm SLR cameras. D-SLR cameras use
different sized image sensors compared to 35mm so an equivalent telephoto conversion figure must be calculated separately.

2

For information on push fit photoadapters visit our Telephotography pages at www.opticron.co.uk

Digi-scoping with digital compact cameras and camcorders

5x. To get the best results you will also need to fit a low magnification wide angle eyepiece to your telescope or use a zoom
eyepiece set at minimum. To find out more about bespoke digi-scoping kits and universal mounts and brackets visit the
Telephotography pages at www.opticron.co.uk or contact Sales on [phone].

Shooting high magnification photos and video through your telescope is possible if you have a suitable
camera or camcorder. To find out how suitable or not your camera is for digi-scoping, position it up to the
viewing eyepiece and see if an image appears on the screen. You may have to position the camera a few mm
away from the eyelens of the eyepiece and increase the zoom to get a full frame image.

The most suitable cameras are those with a lens diameter of 20mm or under and zoom range no greater than

Opticron

©

2013. All equipment and specifications illustrated are subject to change without prior notification.

1

/f.11.9, ES 100 1250mm1/f.12.5),

2

A T-mount

T-mount

Opticron, Unit 21, Titan Court, Laporte Way, Luton, Beds LU4 8EF UK.

Camera body

1. Telephotoadapter or

2. Photoadapter +
eyepiece (inside)

ES Telescopes v3

User Guide

ES0513

Models
ES 80 GA SD/45
ES 80 GA ED/45

ES 100 GA ED/45

Getting Started

Your ES telescope will open up a whole range of new and exciting
impressions, whether for general use or specialist study. To get the
sharpest picture turn the focus wheel slowly 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. These mounts are connected to the telescope
tripod adapter socket located on the base of 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. Make sure it is retracted before
fitting the integrated rubber objective lens cap.

Rotating sleeve
and tripod socket

Eyepiece

Focus wheel

Retractable
lens hood

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.

Specifications & Eyepieces

Specifications 80 SD/45 80 ED/45 100 ED/45

Product Code 40895 40890 40893
OG Dia (mm) 80 80 100
Min Focus (m) 6610
Length (mm) 390 390 497
Weight (g) 1484 1591 2800

EYEPIECES • SDLv2 • HDF •HR/HR2

Product Code 40936E 40810E 40809E 40858E 40860E 40861E 40862E 40930E 40931E 40933E
Magnification 80 20-60x 23xWW 32xWW 44xWW 80xWA 100x 20-60x 27xWA 34xWA 23-69x
Magnification 100 27-80x 30xWW 42xWW 58xWW 107xWA 134x 27-80x 36xWA 46xWA 30-90x
Field/1000m 80 33/20 45 36 28 16 10 35/16 41 33 29/15
Field/1000m 100 26/16 33 27 20 12 7 29/12 32 25 23/11
Eyerelief (mm) 20-18 22 18 17 15 16 22-17 18 17 18-14

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. As Black models but supplied with a fully adjustable
neoprene carry strap for extra comfort.

Traveller semi rigid case (not illus). Available for 80mm models only. Manufactured from water
resistant material with central zip fastener, adjustable straps & loop attachments to carry a tripod.