A few posts ago I wrote about how to turn your TI calculator into an intervalometer. Well, over the 4th of July weekend (especially ON the 4th) I wanted to play with timed exposures. After a few setting adjustments, I came up with a decent formula for the photo above. Details after the jump.

Here are all the settings of the photo in case you wanna try it:
-Focal Length: 18
-F Number: 3.5
-Exposure Time: 15sec

Obviously you’ll need a subject and an some sort of light source. I’ll be posting more timed exposures in the weeks to come. 

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