January 2012
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Tips and techniques for photographing star trails (contd) ..

Tip 941 (Lens can get fogged up): In many cases, you may under-estimate the cold conditions that you will face. In such cases, it is important to ensure that your lens does not get fogged up. You can use some Grabber Hand Warmers for this purpose. These can do a great job of ensuring that the lens does not get fogged.

Tip 942 (Width of lens determines the amount of time needed): A star trail is formed when the star apparently begins to move in the night sky. This in turn is dependent on the focal length of the lens, with the wider the lens, the more time it takes for the star to show an apparent movement in the sky. Some of this measurement is something that you will have to find out for yourself by experimenting with different focal lengths.

Tip 943 (Capturing star trails can be boring): When you are trying to capture star trails, remember that such photos can take a large amount of time. I have known people struggle to stay awake when such photos are being taken, and some of them nod off. Now, what you should do is either have company or take some other material to ensure that you have something to do while the photo is being taken.

Tip 944 (Using minimum ISO): When setting the camera for the shoot, be sure to set it to the lowest ISO possible (100 in most cases). This reduces to a minimum, any noise in the final photo.

Tip 945 (Find the position of the poles): Keep in mind that the earth rotates around the poles (north or south), and so the stars will seem to form trails around the point where the poles are located. If you trying to position the curve of the star trails in your photos related to some object in the image (such as a building, or tree, or something else), then you need to be sure that you know where the poles are located in the sky. Use a Planisphere Star & Constellation Finder for this purpose.

Some video tutorials from Youtube:

During The Shoot Episode 1: Star Trail Photography

Star Trails Photography

How to Photograph Stars and Meteor Showers

Aputure Timer Camera Remote Control Shutter Cable The Photoshop Darkroom: Creative Digital Post-Processing
Wallmonkeys Peel and Stick Wall Decals – A View of Star Trails

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