Opticron IS 70 R User Manual

Telephotography & Digi-scoping

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

the camera lens is substituted for the telescope + telephotoadapter
or telescope + eyepiece + photoadapter. To convert IS 70 R models
to a 780mm
telephotoadapter with 40927S close focus adapter. Alternatively
connect a suitable push fit photoadapter to your viewing eyepiece.
A T-mount 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].

1

/f.11.1 telephoto lens you will need a 40215

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

©

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

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

Camera body

2

T-mount

1. Telephotoadapter or

2. Photoadapter +
eyepiece (inside)

IS 70 R Telescopes

User Guide

IS70R0513

Models
IS 70 R

IS 70 R/45

Getting Started

Your IS 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
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.

Eyepiece

Rotating sleeve
and tripod socket

Focus wheel

Retractable lens hood

EYEPIECES • SDLv2 • HDF • HR/HR2

Product Code 40936S 40810S 40809S 40858S 40860S 40861S 40862S 40930S 40931S 40933S
Magnification 16-48x 18xWW 25xWW 35xWW 60xWA 80x 16-48x 21xWA 27xWA 18-54x
Field/1000m 39/25 45 42 33 19 11 41/19 45 41 40/11
Eyerelief (mm) 20-18 22 18 17 15 16 22-17 18 17 18-14

To connect eyepieces; 40810, 40809, 40858, 40860, 40861, 40930 and 40931 use 40925S adapter.
To connect eyepieces; 40862 and 40936 use 40927S adapter. To connect eyepiece; 40933 use 40928S adapter.

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.

Specifications & Eyepieces

Specifications 70 R 70 R/45

Product Code 40996 40997
OG Dia (mm) 70 70
Min Focus (m)
Length (mm) 295 300
Weight (g) 1096 1123

1

40916S eyepiece

1

10 9

EYEPIECES • IS

Product Code 40916S 40918S
Magnification 28xWA 20-60x
Field/1000m 41 28/13
Eyerelief (mm) 17 34-18

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.