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ASTROPHOTOGRAPHY

by Peter Jenkins FRAS

For Astrophotography there is really only one choice of mount type which fits the bill. An Equatorial (or German Equatorial Mount) is essential.

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Here, in the Northern Hemisphere, due to the rotation of the earth, stars appear to move around the Pole Star (Polaris) – time lapse or star trail photographs show this effect well!

Polaris itself, in fact, appears to describe a small circle as shown so its exact position is dependent  upon your altitude, your latitude and the time of day.

PolarAlign
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Equatorial mounts are often fitted with a built in scope so that they can readily be aligned on Polaris.  The Sky-Watcher EQ8 which I use is not fitted with a Polar alignment scope - I believe that a Polar alignment scope is available as a extra.

 

Note that there are two cable connections to the mount - A 12v power supply (I use Lynx power cables throughout) and a Lynx Astro EQDIR  USB Adapter 

PoleMaster

To align my mount I use a QHY Pole Master which gives a live video view of Polaris and shows the adjustments necessary to Polar Align with very high accuracy.

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