But if all you want is a wired remote control, then you can follow the instructions on this page, and replace the light trigger with a simple switch.
There are three issues when remotely triggering the Nikon D70 or D50 :
The switch is made from a small sheet of copper foil bought at a hobby shop
or salvaged from some old electronic device. From this cut out a shape
like a table-tennis bat, with the pad slightly smaller
than the size of the remote battery, and the handle long enough to reach
out of the remote control.
Now solder a wire on to the end of the handle and insulate one side of the
foil with tape. On top of this tape you need to fix another wire,
which has the last few millimeters of insulation removed.
You can fix either with glue or with another piece of tape that covers only
part of the wire, with the uninsulated part sticking out over the insulated
surface of the foil.
The idea is that you now have a sandwich that you can slide into the remote control on top of the battery, with the naked side of the copper foil facing up and the taped-on wire pressing against the negative surface of the battery. If the wires you use are thick, you may need to cut a nick in the battery holder in order to close it.
In order to trigger the camera, you must now both press the remote button, and short-circuit the two wires on your new switch, so if you put a small clamp on the original remote switch, you can trigger just by shorting the new one. If you are using my trigger, you achieve this by connecting the two new wires to a 3.5mm jack and plugging this into the trigger socket.
The following pictures may make things clearer :
An alternative way to use the D70 remote control as a simple cable release using fibre optic cable can be found at : Fibre optic cable and the D70 remote
External links :
In case you can't afford $15 for the Nikon remote, here are a couple of thorough web pages on how to build your own :
© Mark Harris 2006, but feel free to distribute without changes.