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Astroimaging Meeting

Deep Sky Imaging for Beginners will run at the start of the meeting, followed by other topics/activities as notified through the AI email mailing list.

2 May 2018 - Session 2: Basic imaging with a tracking mount

The aim of this section is to get you to take an image with a camera attached to a telescope. This assumes that you have a telescope that is capable of tracking, that is, it has motors which drive the telescope to counteract the Earth’s rotation. Very few telescope mounts are capable of tracking accurately for more than a minute or two, so you will only be taking short exposures. Later on, we will show you how to take longer exposures using a technique known as “guiding”. It is also possible to combine multiple short exposures of the one object to get a better result—a process known as “stacking”, which we will consider in Session 3. We suggest that you take multiple sets of exposures of various objects and save these in order to use them once we have covered Session 3.

Objective: take a picture through a telescope
• exploit the telescope’s magnification
• slightly longer exposure times because the mount is tracking
• DSLR camera (body only); or astroimaging camera
• telescope
• mount (that automatically tracks)
• tripod
• adapter to allow telescope eye-piece to be replaced by camera body
• planetarium software, e.g. Stellarium
• the need for an equatorial mount
•   ”good enough” polar alignment
• experiment to determine maximum exposure times
• camera attachment
• camera settings
• focusing
• field of view
• targets
• piggy-back photos

Previous: Session 1: Wide field astrophotography - 28 March 2018
Next: Session 3: Stacking - 30 May 2018

A full list of dates for Astroimaging Meetings may be viewed at

Visitors are welcome at Astroimaging Meetings. Join the Astroimaging mailing list by sending a request to stating that you wish to join the AI list (we have other lists).

Event Date: 
Wednesday, 2 May, 2018 - 19:30
Epping Creative Centre, 26 Stanley Road, Epping NSW

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