Originally posted by Dr_who First off i hope your not looking thru the viewfinder with a powerful lens/telescope looking at the sun.
Depending what your trying to achieve you'll probably need a hydrogen filter if you want to photograph the surface of the sun. If you just trying to capture the sun shape and some sun spots the filter they use for viewing solar eclipses should be sufficiant.
++1 to that, use live view if directly shooting the sun, even with filters. Live view can never generate enough light to harm you. Also, be very careful about filters -- if they only block visible light and not UV and IR too it is actually easier to destroy your eyes.
Indirect shooting is easier and safer. Use a scope, tele lens or even a pinhole viewer to project an image on a surface (e.g. a sheet of paper or a wall) and shoot that. Don't focus the light to a point, you want an image of the solar disk. Focussing to a point is a good way to start a fire, especially when projecting onto paper.