Standard 2" barrel adapter allows camera connection to vast majority of
astronomical telescopes.
2" barrel adapter can cause vignetting (partial shielding of detector corners),
especially if a fast optical systems is used with the G3-11000 camera with
24
×36
mm CCD detector. Also T-thread (M42
×0.75)
or Praktica (M42
×
1)
adapters cause even bigger vignetting. G3 cameras can use threaded adapter
with 2.156-24UN thread, designed for TeleVue Paracorr PSB-1100 coma
correctors (thread diameter is approx. 55 mm). Standard adapters for Canon
EOS or Nikon do not cause vignetting even with large chip.
Illustration 9: G3 CCD camera connected to telescope focuser
Photographic lens or some small refractor is the best optical system to start
experimenting with the camera. If you are using some bigger telescope at home
for the first experiments, make sure the telescope can be focused to relatively
nearby objects in the room.
It is better to start experimenting at night, because it is very easy to saturate the
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