HOW TO SHOOT WITH A BIG STOPPER
1 Camera settings and test shot
Focus your shot using AF or manual, and then make sure focusing is set to manual to lock it in position. Next, set aperture priority with your desired ISO and aperture and take a test shot. Apply any exposure compensation as required for a correct exposure and take further test shots. Once you’re happy with the exposure make a mental note of the shutter speed set by the camera.
2 Use an exposure calculator
The easiest way to calculate and time exposures longer than 30 seconds is to use the Lee Stopper App, which is available on both Android and iOS. Once the app is open simply select 6 stops, 10 stops or 15 stops depending on the filter you’re using, and then rotate the wheel on the left to the shutter speed you made a mental note of in step one.
3 Shoot in Bulb mode
Set the camera to manual mode, and if your shutter speed is below 30 seconds set this in manual mode with the ISO and aperture used in step one. If longer than 30 seconds, turn the shutter-speed scroll wheel until set to Bulb on the LCD or top plate. Use the timer in the Lee Stopper App and release the shutter remote button, locking it in place by sliding it. Disengage the button when the timer ends.