Recording Blur

Recording Blur

• Large aperture   =  low f.stop   = narrow depth of field.

•Small aperture  = high f.stop   = wide depth of field

Narrow depth of field:

Wide depth of field:

Shutter speed means timing and duration of opening and closing of the shutter curtain at the back of the camera. A fast shutter speed will freeze action while slower speed creates blurring effect. 

Slow shutter speed:

Fast shutter speed:

WHAT IS SLOW SYNC FLASH?

Slow sync flash is just a fancy term for using your flash with a slow shutter speed. It helps you keep your subject

sharp while capturing motion or a dark background.

•You see, with a normal flash photo, the shutter is only open for a fraction of a second, so the flash is firing for most of your exposure.

•With a long exposure, your camera's shutter is open for much longer than the flash is firing - perhaps even several seconds.

•You can choose whether you want to fire the flash at the start or end of the exposure.

•Firing the flash at the start of the exposure is known as "front curtain" or "1st curtain". Firing it at the end is known as "rear curtain"

Recording Blur Experiments
These images showing slow sync flash photography were taken in a studio with studio lighting. The images that are showing blur were taken with a longer shutter speed to capture the blur and the freeze frame image is taken at at faster shutter speed. 

As well as recording blur in a studio I also recorded blur outside. To capture the blur outside I had to use a longer shutter speed, I found the best one to use was 1/15 which worked well with f/25 and ISO 200. The blur was captured well in both pictures because only the moving vehicle/person is blurred.