I was adviced that need to set my external speed lite flash angle up to 60 deg with omni when taking long exposure (2sec). It is to brighten my object face before camera taking background (I am using prosumer nikon CP 8700 and nikon SB28-dx).
I was wondering why must be tilted up ? can't just fire at 90 deg with omni?
Any purposes or diffrent in picture?
BTW, I heard about curtain so what is 2nd curtain compare to 1st curtain?
Pls help me to clear my doubt and share your experience.
Thank you in advace