CHDK part 1: Pushing your Camera to its Limits
179DISCLAIMER: If you push your camera too far, there is a slight (.01%) chance that you could permanently damage your equipment. Always stay within reason.
In this video, I show you how to use the CHDK firmware extension to push your camera's photo taking capabilities to it's limits. I show you how to override the photographic features of your camera, such as the shutter speed and ISO, so that you can get the perfect shot. As always, experiment with your camera. Some cameras accept a long exposures better than others, so I wouldn't recommend going straight to a 10 min. exposure. Test it out with your equipment to find out what works best for you.
Some info.:
-any override aperture value will work
-Any shutter speed value will work (even the 1/100k)
-exposures over 300 seconds may cause random white pixels to appear in your image.
-For long exposures, the time it takes to take a photo is twice that of the exposure time. Ex: A 100 second exposure takes 100 seconds to take and another 100 seconds to process for a total of 200 seconds of unusable time.
-Any ISO value that is less than or equal to your camera's max ISO will work. (any higher and your camera will crash, but it should re-boot without ill effects.)
-ISO values less than 80-60 will be treated by your camera as ISO 80-60. (values vary with camera model).
-Don't be stupid and do a 10 min. exposure at f/2.7 ISO 3200 in broad daylight. You might fry something in your camera.
And as always, use common sense!
LINKS TO STUFF:
-CHDK Download page: http://mighty-hoernsche.de/
-How to install CHDK: http://www.youtube.com/watch?v=Deas7JX1qZM