Seven Inexpensive Gadgets for your DSLR
You can easily extend the capabilities of your DSLR camera with some of the inexpensive gadgets described below. These are usually available for a variety of brands and formats, do not take up much space in your camera bag and, most of all, are relatively cheap. Search on Amazon or E-bay for great deals on both genuine and generic products. Although the following gadgets are specifically for Nikon cameras, they are usually available for other brands such as Canon, Sony, Panasonic, Pentax and Olympus.
Shutter Experiments 