Moonshed Posted August 8, 2016 Share Posted August 8, 2016 Hi, I am waiting for delivery of my Canon EOS1100D so I can get started on digital photography. I have been reading a lot of what people are saying on this forum and being new to digital I have just got myself confused. If I understand it correctly if a deep sky object needs say 16 mins exposue you break it down to say 8 x 2 min exposures with a 4 min interval between each. I believe this a dual function, it allows the chip to cool down and the camera can take dark frames in the pauses, and because the mount cannot track accurately enough for longer periods. Okay with that. What I don't understand is that if this results in 8 different frames which are then stacked, how does the detail build up? If it is all built up in a single frame then how does that prevent star trails? I am so confused. With the old film camera the shutter was left open for 16 mins collecting all those photons and building up the detail, but this way we have 8 identical frames. What am I misunderstanding? Link to comment Share on other sites More sharing options...
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