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RE: Night Mare
In order to get the movement of the stars, a common technique is to take multiple long exposures, 117 30sec exposures in this case, then stack them together in Photoshop so only the movement of the Earth/stars blends through. Instead of having a single 1hr long exposure which could cause a lot of issues for the final image
ahh... so 117 times taking shot of 30 minutes for each photos then... make more sense... thank you for the explanation there sir...
30 seconds for each shot! All up a little over an hour of shooting