A good quality underwater housing for my Sony would cost around 1500 dollar. But it can be made for about 19 dollar and is very easy to make. Here is how. You will need a 100mm T-piece, an end cap, a screw cap, a circular piece of glass (diameter approx 99mm), some silicone sealant, and some vaseline.
http://www.bettermoviemaking.com/underwater.htm
I started playing around with my flatbed scanner to see if I could capture images of stuff around it, by holding the scanner in my hand and rotating it as it scanned. This allowed the focusing lens in the scanner to pick up some of the light from the surroundings.
http://www.sentex.net/~mwandel/tech/scanner.html
This circuit is used to trigger a camera's electronic shutter circuit when a flash of lightning is present. This circuit would also work for photographing fireworks displays or other events involving flashes of light.
http://www.solorb.com/elect/lightning/index.html
This article describes a motorized, waterproof mount for a miniature video camera. If a suitable waterproof camera is used, this unit can be used outdoors.
http://www.solorb.com/elect/video/cammotor1/index.html
I set about doing some research on the internet for a underwater video housing and found quite a few sites that sold housings but not much on how to build one. However it seemed that a simple cylinder with clear ends would be pretty easy to build. The original plan was to just switch the camera on and put it in the housing, film everything then edit it on the surface.
http://www2.mrc-lmb.cam.ac.uk/personal/pdh/housing/
We are going to show you how to make 3-D photos with any digital camera and some free software. We will also explain how 3-D photography works and as a special treat, we havve got a gallery of 3-D gadget photos to view along with how to make 3-D photos from NASA images.
http://www.engadget.com/2004/08/24/how-to-tuesday-make-3-d-photos/
Using a modified digital camera that can take one picture a second, you can easily build a kite cam and see around your house lawn. The project shouldn’t cost more than $30 for the camera and the parts.
http://digitalcameras.engadget.com/2004/09/21/how-to-take-digital-photos-from-a-kite-part-2-the-kite-and/
This is home-built night vision that was originally a CVS one-time-use video camera. The resolution is awful compared to real NVG tubes. The whole project didn’t cost much more than $35 and uses common cheap AA batteries.
http://www.rpi.edu/~bradfe/NVG2.html
This is how I turned the one-time-use CVS video camera into a re-usable underwater video camera. It is remarkably easy to make this camera waterproof. Go to a camping gear type store or go online and buy the Pelican 1010 case. Make sure you get it in clear with a rubber liner. The camera fits perfectly inside the case with a USB cable on one side.
http://www.rpi.edu/~bradfe/under/under.html
The AdventureCAM project started because we needed a way to hike and shoot video footage at the same time. We are constantly reworking this setup, but the basic configuration is pretty much the same (digital storage, remote camera, remote trigger, backpack).
http://www.rainydaymagazine.com/RDM2006/RainyDayProjects/BackpackCam/RDP_BackpackCam_Neuros.htm