Nikon MC-DC2 wired remote shutter release cord is primarily made for Nikon D90 and D5000 DSLR camera. MC-DC2 simulates the work of the shutter release button for the DSLR. When you press the shutter release button of your MC-DC2 halfway down, it will focus your subject (provided that your camera is in Autofocus mode) like it does when you press the shutter release button on the camera. It also has a lock feature to hold it down for a long exposure shooting while using the BULB mode. You will have more control over your camera using this cord vs Nikon ML-L3 Wireless Remote Control. MC-DC2 is 41" long and enough for you to move around your camera freely. When you want to shoot long exposure photographs like fireworks shooting or night scene, this cable works best to avoid any camera shake. MC-DC2 also works best when you want to shoot a macro. You can setup your camera on the tripod, check your cable connection and enjoy remote shooting. This unit is small, lightweight, and fits in your camera bag with ease. If you are looking for something to avoid camera shake while shooting, MC-DC2 can be your best friend.
How to use the remote shutter release cord?
Using MC-DC2 wired remote shutter release cord is really simple. When you want to use the shutter release cord, you just have to turn your camera off (if your camera is on) and then plug-in the cable to your camera port (single port on the left side on Nikon D90). Next step would be to turn on your camera and the shutter release cable is ready to use. You don't have to change or adjust any settings on your camera to make this cable work. As soon as you plug the cable in, it starts working as a remote shutter release button.
I bought this cord for Nikon D90 couple of months ago to shoot fireworks. I paid around $35 and it does exactly what it says it does. I am very happy with the purchase.