"Mark M" wrote in message
news:nIq7d.12629$Hz.9309@fed1read04...

"Annika1980" wrote in message
...
From: "Mark M"

http://www.pbase.com/bret/image/34504445

Why are you shooting at 4f?
Isn't this shot with your 70-200 2.8 L?

1/250 could have been a crispy 1/350 or more at 2.8,
and yes...you'd still have some obvious and nice motion effects...

Can you say "flash sync?"

Ah.
There's no sky visible...

At least you thought to use 2nd curtain synch...



Hi,

saw the reference to 2nd. curtain synch. Could you please explain the
difference from 1st curtain?
I keep on seeing these terms mentioned but have never found an explanation
for them.

Regards

Len