Canon 93517 - Manual (Page 29)

29
Enjoy your telescope in a completely new and fascinating way — use your brain to
its full capacity rather than speculating on the next, larger size telescope.
The Stereo Binocular Viewer (#93690) allows you to adapt two eyepieces to the
telescope for simultaneous viewing (i.e., like binoculars). The result: a fantastic three
dimensional effect when observing many celestial objects. The Stereo Binocular
Viewer greatly improves contrast and definition on lunar, planetary and solar subject
matter as well as on deep sky objects.
Using both eyes to view through a telescope is a new, relaxed and thrilling way to at
last enjoy your observing time. When both eyes are open, your eye muscles are
relaxed and you do not suffer from eyestrain.
To demonstrate just one of the effects you will see, compare an eye chart when
examining your eyes. Cover one eye and read the chart to the smallest line you can
see clearly. Now remove the cover over the eye, relax for a few seconds and then
examine the chart with both eyes open — you can see more detail than with one
eye. In addition, the brain corrects for small defects (aberrations) of the eyes when
given the information from both eyes.
Beyond a 50 foot distance, pupils are nearly parallel and prevent real stereoscopic
viewing. However, since our brain “knows” (due to near distance experience), we
identify distant objects as three dimensional. The more experienced the observer, the
more this effect will be apparent.
The optics are precision aligned and MgF
2
coated. Interpupillary adjustment reaches
from 53mm to 76mm. The optical head has a 60° viewing angle for a comfortable
viewing position. Full 360° head rotation is provided, together with 2" sleeve and
1
1 /
4
" drawtube to fit 2" Focuser and 1 1 /
4
" Visual Backs of all Schmidt-Cassegrains —
and also Focusers of Refractors.
The removable 1 1 /
4
" drawtube features a camera T-2 thread on the Binocular side and
1 1 /
4
" Filter Thread on the entrance side, to accept Celestron 1 1 /
4
" Eyepiece Filters.
Utilizes 1 1 /
4
" eyepieces (not included). Must use two eyepieces of equal focal length
and design type. Made in Germany.
S
TEREO
B
INOCULAR
V
IEWER