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I insisted my star trail shots were fine until a guy at the club zoomed in and showed me the dotted lines
For about two years I was stacking night sky photos in a way I thought was clever. I would take 30 second shots, then use software to blend them together, and I was proud of the results. Then last March at our astronomy club meeting in Boise, a guy named Dale asked if he could look at one of my files on his laptop. He zoomed in to 200 percent and pointed at the star trails. Instead of smooth arcs, they looked like tiny dotted lines with gaps. He said, your interval between shots is too long, you are losing the sky between frames. I felt my face go red. I had been telling people for two years that my method was the best way to keep noise down, and I was quietly messing up every single wide field shot I posted. Turns out my camera was set to a 2 second delay for mirror lockup, which I did not need for this at all. Has anyone else had a setting quietly wreck their photos while they blamed something else entirely?
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