How to: Photographing with mixed light

by Urs Recher

In this image, the focus was on creating dynamics through intentional motion blur while keeping the model Mia (@miaa.cv) perfectly sharp. I deliberately chose modifiers with narrow light spread to illuminate only clearly defined areas - this allowed precise control over which parts were lit by flash and which by continuous light.

As the (flashing) main light, I used a Pulso L lamp in a Flooter (1). The large Fresnel spot was focused to the maximum and additionally equipped with barn doors to further narrow the beam angle. This way, the lamp illuminated only Mia, and only minimally the dried flowers directly next to her.

Next, I positioned another Pulso L lamp (3) with a P70 reflector and a tight honeycomb grid so that it illuminated the flowers placed slightly in front of Mia unevenly. I paid special attention to ensuring the light did not reach the model, so as not to cause motion blur there. A third Pulso L (4), also equipped with a P70 reflector and honeycomb grid, was used selectively to light some flowers behind Mia as well as subtly light the background.

All Pulso L lamps used so far were controlled via a Satos 3200: the Flooter in flash mode, the two P70 units in continuous-light mode. On the Satos display, it looks like this:

For the Flooter, I selected the shortest possible flash duration at this power level. As shown on the display, it was 1/18,900 s. Both continuous-light lamps were set to slightly warmer color temperatures: 5200 K and 4000 K.

To bring out the dried flowers that were slightly too blurry in the first test image, I additionally illuminated them - very subtly - from above using a Siros L compact unit (2), also set to a short flash duration. In the background, I added more flowers, which I illuminated with an LED F160 (5), also equipped with a P70 reflector and honeycomb grid.

The motion blur was created by slightly moving the camera during the exposure - the extremely short flash duration of the Flooter main light still ensured a perfectly sharp portrait.

The photograph was taken with a mirrorless full-frame camera using a focal length of 105 mm. At ISO 64, the aperture was f/4.0 and the shutter speed 1/2 s.