Join Brent Winebrenner for an in-depth discussion in this video Applying concepts: Scenario one, part of Lighting for Photographers: Flash Exposure.
Okay, so now we're playing. Just keep that kind of a distant look because I think that's really working.…So, in the last movie we established exposure on the background and on our model.…I'm shooting at f/5.6, and that decision is what drove my flash to subject distances and…my Power Ratio settings on the flash.…So I am happy with my exposure on the subject at this point.…She is normally exposed, and I've got nice colors on the background.…
So, now we're going to modify the key light to soften it and really start creating pictures.…Okay, the last thing we're going to do I think on this setup is we'll pull the diffusion…flat in, and we're going to light her softly through the diffusion flash, because…what I want to do is get her evenly illuminated from top to bottom.…All right, I am going to kick the power of those two background lights down even further…and then when we put the diffusion flat up, we will have a little less contamination from…this light, so we're going to knock this down another stop.…
Even with today's automatic flash systems, there are good reasons to understand how flash exposure really works. Brent details these concepts in this course. The course describes how to calculate the true power of your flash and how to modify its output to match your needs, a technique that can extend battery life, reduce recycle time, and provide exposure control that is more predictable than fully automatic modes. The course concludes with several shooting scenarios during which Brent explores the creative use of gels, reflectors, and other light modifiers.
- Understanding exposure basics
- Reviewing aperture, ISO, and shutter speed
- Adjusting strobe power and flash to subject distance
- Finding the guide number of a strobe
- Making calculations based on ISO
- Understanding power ratios