Technique for 30 exposure?

Can someone direct me to where I may learn proper techniques in various lighting situation?
I search the forum, but did not find anything based on my search criteria.

Kind of a confusing question. Maybe more specific?

here's a great site for Flash -- http://strobist.blogsp​ot.com/

There is a very good book called "Understanding Exposure" by Bryan Petersen. $20 or so. A very good starting point that explains ISO, Aperture, Shutterspeed, F-stops, etc.

Ah crap, I did not have the word "second" in my title!
Specifically, I am asking about 30 second exposure methods. Sorry about that.

Not really sure what you're asking. A 30 second exposure is no different than a 1 second exposure, except for the amount of time it takes, obviously! You don't usually go out with a 30 second exposure in mind, it depends on what's appropriate for the level of light you have.

If you're asking how to do a long exposure like that in bright light, then you need ND filters to reduce the amount of light. e.g. I have a B+W 10-stop filter that allows long exposures during the day.

blackcap wrote in post #5499872
If you're asking how to do a long exposure like that in bright light, then you need ND filters to reduce the amount of light. e.g. I have a B+W 10-stop filter that allows long exposures during the day.

Thank you!

and any long exposure requires a Tripod ... and many other factors to help reduce vibration in you camera .. e.g., Manual mode, mirror lock-up, etc. You will likely have to set your camera to "BULB" mode as well ... and use a shutter-release cable/device.

Curious what you are shooting that requires a 30 sec. exposure? That is a very long exposure, IMHO.

Cody21 wrote in post #5502086
Curious what you are shooting that requires a 30 sec. exposure? That is a very long exposure, IMHO.

Motion blur of clouds during the day is one reason. Also I hear a long exposure like that can make people/cars disappear (as long as they are moving, of course), which could be useful in touristy places.