As you advance in your photography know-how, a natural evolution will be your desire to light elements of your photographs in a way that you find more pleasing or creative. One thing that is really necessary to master for this evolution, and a key feature when photographing portraits is fill light.
Fill light is usually necessary when the subject is lit from the back (with the light source in the frame) thus the side facing the camera is generally quite dark (though it can happen in plenty of other situations when a scene is unevenly lit). If you don’t fill in that shadow you’ll often have to overexpose the background where the light source is in order to get the subject exposed correctly. There are several ways to use fill light in a situation like this, each with its own challenges.
How to Use a Reflector for Fill Light
This is probably the cheapest tool to help you get some fill light when necessary. Reflectors utilize available light, meaning they simply reflect the sun back towards your subject. Now, as opposed to a flash, the reflector provides softer light due to the sheer size of its surface. As you probably know by now, the bigger the surface – the softer the light is. You can easily find 40 inch reflectors (in diameter) for around 20-30$, but if you wish you can get even bigger ones for a similar price.
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Another good thing with reflectors is that the brand doesn’t matter much, since there are no “high tech” parts in it – it’s a simple reflective surface, nothing special. The branded ones will maybe last longer due to better materials used, but so far I haven’t seen many reflectors falling apart due to bad build quality, and all of them were no name brands.
The downside, however, is that you often need a third person to hold the reflector since it is often really difficult to hold it by yourself and shoot the photo. Yes, you can set it up on a tripod or something similar, but if it is large enough it can easily get knocked down and get moved by the wind. Additionally, if it is not a strong light source, like the sun for example, the reflector won’t be really efficient: the less light there is, the less light it can bounce back.
How to Use Fill flash
Fill flash is often the best way to go, if you know how to use it of course. Yes, the flash is simple to set up, if you don’t mind the harsh shadows and different color temperature. If you want to match the color temperature however, you’ll have to fiddle with it a bit. Using gels and softboxes/umbrellas will soon become a must as you strive for better quality images, and, of course you’ll want it off camera as well, so you’ll need to bring tripods and so forth.
Fill flash is the way you get best quality images if there is not enough light to bounce back with a reflector. The key thing that you need to remember about the quality of the images when using flash, is that it is an intense precise light due to the high power, but because of the short burst of light emitted it usually increases sharpness by freezing the subject.
Sure, it is a tad more complicated to work with, and more expensive, but if you can afford the cost and the effort the results can be great.
How to Use HSL Recovery in Lightroom
If you don’t have a flash or a diffuser on hand, and you really want to do a portrait like these you'll need to do some post processing. You’ll have to rely on the dynamic range of the sensor and your post processing technique.