Yes it’s possible to make portraits without flash as well, but you will need to have a good model, and something to hold here head. Here is 2 example for Becquerel dag, in camera exposure. I used just the sun for lighting. I can’t remember for the exposure time.
I will soon be attempting a Becquerel dag, but with over 10,000 ws of strobe power. I want to attempt a 15 second exposure with two to three full power pops on the strobe…in your opinion might that work?
I used 6 pops (6x 1/250sec) from my 9600ws strobe at 1 meter and f2.8 to get this result on a magenta B-Dag plate. Normally 1 pop is enough on a rose M-Dag plate.