The Calumet Universal Cable Release when combined with one of the Calumet Camera Adapters (sold separately)* will allow you to avoid camera shake that is common when pressing the shutter release with your finger. The cable release focuses & releases the shutter in one stroke & also features a convenient sliding lock for timed exposures. It's 39" cord is coiled making it easy to store. * This cable release requires one of the following adapter plugs for use with your DSLR: Camera Adapter for Canon with N-3 Plug (CF0061) Camera Adapter for Canon with 2.5mm Plug (CF0063) Camera Adapter for Nikon with 10-pin Plug (CF0066) Camera Adapter for Nikon with DC-1 Plug (CF0068) Camera Adapter for Sony (CF0070)