Soft light versus hard light and when you want each
Okay. Last couple lessons we talked about finding a window and figuring out which direction it's coming from. Today we're talking about a different question: is that light soft or hard, and which one do you actually want.
This one trips people up because they assume soft is just "better" and hard is a mistake. Not true. They do different jobs. You want to know how to get either one on purpose, not stumble into whichever your window happens to be doing that day.
What soft light actually is
Soft light is light that's been spread out before it hits your subject. Think of an overcast day. The sun is still up there, blasting away, but the clouds are acting like a giant diffuser and scattering that light across the whole sky. So instead of one small hard source, you've got light coming from a huge area, and it wraps around your subject instead of carving into them.
Shadows under soft light are gentle. They fade out instead of having a hard edge. Skin looks smoother, wrinkles and texture get minimized, and it's very forgiving of blemishes, under-eye circles, that kind of thing. This is why a north-facing window on an overcast day is basically the beginner's best friend. Big soft source, no direct sun blasting through it, very hard to mess up.
What hard light actually is
Hard light comes from a small source relative to your subject. Direct sun on a clear day is the classic example. One point of light, high contrast, shadows with crisp defined edges. You'll see a hard shadow line where the light stops and the shadow starts, almost like someone drew it with a ruler.
Hard light isn't a mistake. It's dramatic. It shows texture, shows structure, gives you contrast between light and dark that reads as bold rather than soft and pretty. Think about the difference between a magazine beauty shot and a moody black-and-white portrait of somebody's grandfather. Both good. Very different light.
How to actually make each one at home
For soft light: find a window that doesn't get direct sun, or shoot on an overcast day, or hang a sheer curtain or even a bedsheet over a sunny window to diffuse it. That's it. You're just breaking up the source so it's bigger and less concentrated. I've done this with an actual bedsheet clipped to a curtain rod more times than I can count. It works.
For hard light: put your subject in direct sun, or right in the path of unfiltered window light with no diffusion in front of it, and don't fight it. Let the shadow be a shadow. A lot of beginners see a hard shadow on someone's face and panic and try to fill it in with a reflector or move the person somewhere else. Sometimes that's right. Sometimes the hard shadow is the whole point of the photograph and you're accidentally erasing the thing that made it interesting.
When you actually want each one
Soft light for: most family portraits, most headshots, anybody self-conscious about skin texture, anybody you want to look approachable and relaxed. This is your default. If you don't know what you're going for yet, default to soft. It's the safer choice and it's genuinely hard to get an unflattering result out of good soft light.
Hard light for: portraits where you want mood, character, texture. An older subject with a lot of life in their face. Somebody who wants to look strong or serious rather than soft. Black-and-white work especially loves hard light because you're relying on contrast to do the storytelling instead of color.
My honest opinion, and your mileage may vary here: I default to soft light for almost everything I shoot because most of what I photograph is family and neighbors who want to look like themselves on a good day, not like a magazine spread. I'll reach for hard light on purpose maybe once every ten sessions. That's a personal preference, not a rule, so don't let me talk you out of trying hard light just because it's not my first instinct.
A quick caution
If you're shooting someone in direct hard sun, watch their eyes. Squinting is the number one thing that ruins an otherwise nice hard-light portrait, and people squint without realizing their face is doing it. Turn them slightly so the sun isn't straight in their eyes, or move them to open shade at the edge of that hard light instead of dead center in it. And if it's summer and you're doing this outside for more than a few minutes, that's real sun on real skin, so keep an eye on how long you're keeping people out there, especially kids.
This is actually the exact lesson I wish I'd understood before I paid for a private lighting session years ago. I talked the instructor down to an hour for what he'd originally quoted me for forty minutes, which felt like a personal victory the whole drive home, and then we spent almost the entire hour on this one concept: soft versus hard, and why you pick one on purpose instead of accepting whatever your window happens to be doing. Would've saved me some money to just know it going in. So now you know it going in.
Before next time
Find one soft light setup and one hard light setup in your own house or yard, and just notice the shadow difference on your own hand. You don't need a subject yet, just the noticing.