This time-lapse image was captured in the parking lot one pleasant summer evening by Jim Foy. The stars appear to move around a central point, when it is actually the earth that is moving. The center point in the image is Polaris, commonly known as “The North Star”.
Work flow for the star trails image:
Borrow fisheye lens from Jim Bastable
Experiment with Nikon D60 DSLR camera to determine the longest time the camera can shoot without the image becoming grainy (due to dark noise)
Start with a ISO 800 setting and set the shutter three stops from the widest opening.
Place on tripod and center Polaris.
Take exposures of 2, 4, 6, and 8 minutes.
Find the longest time period that produces a clean image (may have to adjust the ISO to 400 if they are all grainy)
Then, take as many sub-exposures (Mine was about 1.5 hrs – 4 min subs – if I remember correctly) of that time length at the same ISO and F-stop settings used in the experiment.
I got bored and walked around with my red light in front of the Veasey building. A car drove by as well. Two planes took off and one shooting star. All added mystery to the photo.
Load all the subs into Photoshop (I have an old version – CS2)
Stack each photo with a lighten layer in between each photo.
Merge the layers into one.
Season to taste ( that is adjust the color balance and brightness as you see fit)
Enjoy – this is fun – for some of us that is.
Return Fisheye lens to Jim.