Originally posted by lister6520 The shutter speed can be taken way up to the maximum and it still works but power falls off very rapidly as you increase shutter speed. For instance At 1/1000sthe GN is reduced from 58 to less than 10.
It is also strobing the flash, increasing the duration and really does nothing to help freezing motion in dark environments. It is useful for shooting in bright environments where you would need to reduce ambient light as much as possible and you are already stopped down.
The Metz 52 af-1 is a fairly slow flash with a duration of 1/125s at full power, but at 1/4 power it is 1/2000s, which is more than enough for freezing something like a moving dog. This even means at full power you are wasting light by using a shutter speed faster than 1/125s.
Here is what I would do for this shot:
Set the camera on a tripod at f8 and a low ISO, then get the shutter speed for the ambient dialed in without the flash or dog, this will vary depending on how much of the background you want to show. This could be 10 seconds, it really doesn't matter, slower is actually better.
Setup the flash with some form of manual remote trigger, could be optical, could be radio, could be a cable that you touch two wires together to make the flash trigger. Put the flash where you want it on manual and set the power somewhere to start, 1/4 would be a good starting point.
Have your dog stand in place where you will want to take the picture, this is so you can dial in exposure of the flash. Take an exposure and pop the flash by hand at some point during the exposure. Assess the output, if you like the light leave the power where it is, if not adjust it until you like it.
Now you're setup for the actual image. Trigger the exposure of the camera, release the dog and trigger the flash by hand when the dog crosses the point you want.
Last edited by elliott; 11-17-2013 at 03:47 PM.