I'm trying to take pictures of star trails with my Nikon D3100. I have a shutter release and I set it to take 150 45s exposure photos. For some reason it wont take the 45s photos back to back, it seems as though the camera has to take some time to save the photo. I was wondering if there was any ways to get around that. When I get every other photo my star trails look like dots rather than lines. Help would be greatly appreciated, thanks.
Added (1). I can't do longer than a 45s exposure because otherwise my sensor will overheat and I get 'hot pixels'. I use an image stacking program to get the star trails.
How do you change the noise reduction?
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