Quote:
Originally Posted by obsidianphotos
Nice image Mike.  Each has it's own application. And I use both long and loooooooooong exposures for startrails equally, depending on the conditions and what my goals are from the imaging session |
Quite right! The best approach.
Quote:
Originally Posted by obsidianphotos
That's what I do. Stick the camera in the boot where the temp is closer to ambient, and let it click away.
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I used to do that for deep space stuff years ago but I've just been forgetting to take darks lately.
Quote:
Originally Posted by obsidianphotos
Being completely self taught- trying to determine the right exposure at night used to really confuse me and more often than not I would just guess (and more often than not get it completely wrong) until I read a great little ebook called "Seeing The Unseen" by Alister Benn. It was a lightbulb moment. Now I take a high ISO, 30 second test shot and just work it out from there based on the histogram of the test shot. As an example: Test done at ISO 6400, 30 Seconds and F/2.8. Histogram shows that I am underexposed by one stop. I want to shoot at F/5.6 to get more depth of field. F/2.8 to F/5.6 is two stops (running total 3). And I want to shoot at ISO 400 instead of 6400, which is 4 more stops for a total of 7. 30 seconds times 2, times 2, times 2, times 2, times 2, times 2, times 2 = 3840 seconds or 64 minutes to get the right exposure (I hope my math is right- doing this in my head)
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Ah thanks - good point. There's a method to the madness. I've seen Alister's book but not read it - will have to have a look.