Verified answer

First of all, set your camera on a tripod. You can get the "streams of light" by hand-holding the camera, but the results will almost certainly be way too blurry for your liking.

Next, on shutter priority mode ("Tv" on your function dial), select a shutter speed of 2 or 5 seconds (your display should say 2" or 5", that is, have a "straight quote" sign to the right of the number). Press the shutter, being careful not to shake the camera; if your touch is too rough you might need a cable release. Review the picture on your display. If it's too light or dark for your liking, make a note of the settings, switch to manual mode ("M" on your function dial), enter the same settings then adjust the aperture accordingly.

I am glad to see that you realize this as "something of great importance", as it truly is, but what concerns me is that you are putting this couples most cherished wedding memories at great risk. Don't do it! The job of a wedding photographer should not be taken lightly. It takes a tremendous amount of experience and knowledge to be able to deliver a quality job. Unlike portrait or engagement photography, you do not get the chance to redo it if the images do not come out...there is only one opportunity to get these images right and it takes a tremendous amount of knowledge and coordination on the photographers part to make it happen. It is my opinion that no one should ever take on a wedding job until they have been a second shooter at a few weddings to gain experience and become familiar with the flow of the day as well as any issues that may arise. If you are looking to break into the industry you should consider joining one of the wedding photography forums. I know the DWF has a mentoring forum where you can learn from your peers. I really do hope that you reconsider or at least tell the couple your concerns and perhaps offer to shoot the wedding for free to gain experience, that is, if they are willing. Good luck!

Is this for your photography class? Can you first guess what setting you need first?

Put the camera on a tripod. This is an absolute must. Set the ISO to low. (Shoot it in RAW so you can color correct it). Use a cable release. Set the shutter speed to a few seconds. Set the aperture to something small.

You will need to underexpose it a bit. If you go by the meter's reading alone, it will be overexposed most likely.

I have a similar shot here http://www.flickr.com/photos/little_pooky/25207151...

You will also find this interesting http://www.flickr.com/photos/little_pooky/23738768...

This, as well http://www.flickr.com/photos/little_pooky/32990177...

camera: Canon EOS Digital Rebel XTi

Exposure: 30

Aperture: f/18.0

Focal Length: 18 mm

ISO Speed: 1600

These are exposure settings of the first photograph in question.(taken from exif data)

When you do it ,try to bring down the ISO by either increasing the exposure time or opening the aperture a bit more. ISO 1600 might show on the print.

this is long exposure lighting. you need to set your shutter speed as low as possible (without overexposing - sometimes it helps to lower the ISO) and set your camera on something steady (a camera stand works best) Do not move the camera at all when the picture is being taken, the slightest movement will ruin the effect and blur the picture. best of luck. try using this website if my advice doesn't help.

http://tutorials20.com/misc/long-exposure-basic/

Look in your manual (or online) for Rear Curtain Flash Sync ( Second Curtain Sync ).