What speed film do you used to capture star trails?

I've taken pictures of "star trails" before but I can't remember the speed of the film that I used, just that I used a 28mm lens and f/2.8 for about 2 hours. Also if anyone can suggest alternate settings and the film speed to be used with it I'd appreciate it.What speed film do you used to capture star trails?With film speeds you have to remember that there is a trade off in getting a faster film. With the faster films you will be able to notice more grain in your photographs. So it all boils down to what you plan on doing with your star trail photograph. If you just want something to show star trails for say homework, then I would suggest Kodak's 800 ASA max film. If on the other hand you want something to use for a project AND hang on the wall, I would suggest Kodachrome slide film, either the 64 ASA or the 200 ASA. Part of the Art of learning photography is the experimentation. I really recommend that you get a few different speeds of film and experiment with the settings, taking notes as you go. In normal photography, you are capturing a moment in time with the available light in doing so. With star trails, you are just capturing the light and it's movement. Vivid colours are not a necessity here. Look at Black and White films. The idea here is to minimize the grain, so, the lower the ASA the finer the grain and larger enlargements possible. Play with your settings, try a larger lens, actually I do not do astro photography with anything smaller than a 300mm super fast lens, but that depends on what you are shooting. Kodachrome has a nice spectral response in the 400 nm to 700 nm range, that is why I recommend it. But like I said, the Art of learning photography is the experimentation. So get your variety of films, your camera, tripod and cable release and go experiment. Take notes, compare, learn. Don't forget the ability to push your films and don't forget about film fogging due to ambient light pollution during extended exposures. F/2.8 is a good start, just remember that if you increase your f/stop by twice you increase your exposure time by twice, remember the faster the lens the better you are. If this is something that you might enjoy doing full time then you can learn about hyperizing your filmWhat speed film do you used to capture star trails?
I use the bulb setting on my canon and let it sit for about two hours as well.What speed film do you used to capture star trails?it will take at a lot longer than that. Some cams have a bulb mode, which will hold the shutter open as long as you hold the button down. you're going to have to play with it more and find what you like bestWhat speed film do you used to capture star trails?
35mm



脝What speed film do you used to capture star trails?I use either 50 or 100 ISO speed film; you don't really need fast film for these shots. Set the aperture on your lens as far open as possible (f2.8, f3.5). Open the shutter on the bulb setting of your camera with a locking cable release with either a mechanical or electronic release. For the exposure time, the longer the better! The longer you leave the shutter open, the longer the star trails will be. I've found that somewhere between 4 to 6 hours is optimum.

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