If you have ever read a photography article or book about getting sharp pictures you would know that there is always a section about using remote shutter releases. The IR remote shutter releases are more popular online while professionals rely on using the good old cable ones. So I went online to find out what a simple cable and plug with switch would cost? The cheapest one was for 900INR which is a lot to ask for just a piece of wire. I can do better. So I decided I would make my own.
The cable release typically involves getting a connector the brings out the contacts of the release button. From these, three contacts are going to be used- Focus, shutter release and common. In case of Canon EOS t2i and related models, a pin connector is used. The schematic for the canon t2i is given below.
When the common terminal is short circuited with the corresponding pin then the appropriate action is performed. What we did was to use a simple push switch which was most appropriate for handheld use and bought it from the local spare part vendor because cost was the first constraint here. We then added a smaller push button by gluing it to a convenient location where it will be easily usable.
I also added a simple burg strip using super glue and made the connections to the switches and proceeded to add connectors to the cables as necessary. I am not going into the details of the other connectors as they are irrelevant. I wanted to be able to use the same cable to connect a microcontroller to control the shutter for an intervalometer project but that I will cover in a different post.
A little soldering later, the result was a cheap sturdy cable that can be used with the T2i at a fraction of the cost.
Please leave a comment if any specific details are required.