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Using your Opticstar Camera
For the more serious observations and tracking of night sky objects you will greatly
Tracking
Alternatively you may wish to use you astro-camera to aid tracking during long
exposure photography when us
c
ase the video camera needs to be attached to the main optical tube of your telescope
and
pr perly aligned before use.
o
You may also want to deploy this arrangement to take video footage of the night sky
w
ith
your video camera while taking advantage of your telescope's tracking
capabilities.
A
ttaching Lenses to the Opticstar Video Camera
Your Opticstar camera comes equipped with
that supports various types of lenses. Standard and ZOOM manual Lenses can be
easily attached to your camera as can automatic lenses. When using automatic lenses
a control cable supplied with the lens will connect it to the camera.
Special care has to be taken when purchasing lenses that are best suited to your
O
pticstar camera. That a lens will fit it does not necessarily mean that this particular
le
ns will perform well with your camera. As a matter of fact performance may be
d
eteriorated by a factor of 2 to 4 times. Opticstar provides lenses that best match your
c
amera's architecture, CCD type, CCD size and functions.
In
general the format size of the lens must be preferably equal to or greater than the
fo
rmat size of the camera that is used with. If the lens used is of smaller size
p
eripheral parts of the image will be cut-off (tunnel vision effect). For example:
o A 1/2" lens on a 1/2" format camera will produce a rectangular image with
maximum field of view (optimum).
o A 1/3" lens on a 1/3" format camera will produce a rectangular image with
maximum field of view (optimum).
o A 1/2" lens on a 1/3" format camera will produce a rectangular image with a
somewhat reduced field of view.
o A 1/3" lens on a 1/2" format camera will produce a rather compromised
image, not recommended (worst case).
ing your telescope with a digital or film camera. In this
a standard female C/CS screw mount
© Opticstar Ltd 2003, 2004
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