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Visual on stars


lav2566@yahoo.com
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As a star goes out of focus, its light is spread into a larger and larger circle. Eventually, the circle of light can become larger than the field of view. In this case, the field appears uniform. So, yes it needs to be close to focus in order to see the star.

If the telescope drawtube has a graduated scale etched or printed on it. I would suggest using the Moon to get your initial focus and remember the scale setting for future sessions. You would need to repeat this for every setup. For example for every combination of camera and focal reducer or Barlow or barrel extender. It is handy to keep it in a document on the desktop of your laptop. Be sure to back it up along with other laptop data.

Once you are close to focus, even a bright star like Capella will be small and dim on BYE's LiveView screen because of the short exposure duration of the LiveView frames. In Frame and Focus you should set the exposure to a Tv value of 2 seconds (NOT BULB with a 2 second duration) and set the ISO close to or at the camera's maximum. This will cause the camera make the star as bright as possible.

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