Here’s a nice and simple guide on how you can make your own shutter release for your Canon DSLR cameras. Materials and tools that you’ll need:
(1) One – 3/32” Stereo Audio Plug (MUST BE STEREO, NOT MONO)
(2) One – Small Toggle Switch
(3) Two – Momentary Switches (SET TO OPEN)
(4) Wire – Small Gauge Insulated wire w/ at least 3 insulated wires within the main outer insulation. (I used 20’ basic telephone wire and only used 3 of the 4 wires in it.) (length depends on how long you would like your shutter release to reach.)
(5) Wire – Small gauge scrap wire, for wiring switches
(6) One – Project housing or Something to mount your switches on   

Canon EOS 7D is a high-end DSLR camera features an all-new 18.0 Megapixel APS-C size CMOS sensor and Dual DIGIC 4 Image Processors, a new all cross-type 19-point AF system with improved AI Servo AF, ISO 100-6400 (expandable to 12,800), 8.0 fps continuous shooting, New iFCL Metering with 63-zone dual-layer metering system uses both focus and color information to provide accurate exposure even in difficult lighting, Full HD video at 30p (29.97 fps), 24p (23.976 fps) and 25p, a magnesium alloy body that is dust- and weather-resistant and a 3 inch LCD monitor with 920,000 dots (VGA resolution) with a viewing angle of 160°.   Read more »

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The Olympus E-420 is the world’s smallest digital SLR features 10-Megapixel Live MOS image sensor, Autofocus with Live View, Face Detection, Shadow Adjustment Technology, Dust Reduction, Digital Image Stabilization, and a 2.7″ LCD Screen. The camera supports the Olympus FL-50R and FL-36R wireless electronic flashes and it measures 5.1 inches by 3.6 inches by 2.1 inches and weighs 13.4 ounces.   Read more »

The Canon PowerShot SD770 IS is an 10 megapixel point-and-shoot digital camera features 4x optical zoom (35mm film equivalent: 35-105mm) with Optical Image Stabilizer System, ISO 80/100/200/400/800/1600 and a 2.5-inch a TFT color LCD. The camera measures 3.39 x 2.13 x 0.80 in./86.0 x 54.0 x 20.4mm and weighs 4.59 oz./130g.   Read more »