
Telephotography using SLR cameras (digital or film) and
compact system cameras. In this system the camera lens
is substituted for the fieldscope + telephotoadapter or
fieldscope + eyepiece + photoadapter. To convert your HR
fieldscope into a telephoto lens (HR 66 800mm1/f.12, HR 80
900mm1/f.11.3), you will need a 40215 telephotoadapter.
Alternatively connect a suitable push fit photoadapter to
your viewing eyepiece.2A T-mount is required to connect
the assembly to the camera body.
Notes. Focusing is facilitated on the fieldscope. 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.
1This is an approximate figure based on 35mm SLR cameras. DSLR/compact system cameras use different sized image sensors
compared to 35mm so an equivalent telephoto conversion figure must be calculated separately.
2For information on push fit photoadapters visit our Digiscoping & Telephotography pages at www.opticron.co.uk
Digiscoping with digital compact cameras, camcorders and mobile phones
Shooting high magnification photos and video through your fieldscope is possible if you have
a suitable camera, camcorder or mobile phone. To find out how suitable or not your device
is for digiscoping, position it up to the viewing eyepiece and see if an image appears on the
screen. You may have to position the unit a few mm away from the eye lens of the eyepiece
and increase the zoom to get a full frame image.
To find out more about bespoke digiscoping kits and universal mounts and brackets visit the
Digiscoping & Telephotography pages at www.opticron.co.uk or contact Sales on +44 (0)1582 726522.
Telephotography
Camera body 1. Telephotoadapter or
2. Photoadapter +
eyepiece (inside)
T-mount