photographing in hard sunlight, with or without flash
This is one of the toughest lighting conditions to deal with. Where I can, I try and position my subjects so that they are in shade, or at the very least their backs are to the sun. This way they are looking away from the bright light and less likely to squint and frown, and they will also have more even shaded light on their faces, with rim lighting around the sides.
But where you can’t position people and you have to deal with the lighting situation as it is, you have a few options:
You can get lucky with the angle so the features and details of most of the people are shaded, providing you with fairly uniform light on the essential parts of what you want to capture. Some parts of the scene will blow out, but hopefully nothing really relevant.

With this photograph, no flash was used. However, I did work things in my favor by shooting in the RAW format so that I have much more control over the image in post-production. I can more easily hold detail in the highlights while bringing up detail in the shadow areas.
(The examples in this posting assume that you are a solo photographer without the team of assistants to hold up large scrims and fill lights, but that you have to make do with what you have – a camera with a speedlight mounted on it.)
But if you’re stuck with full sun where part of the subject is in shade and the rest in sun, you have two options:
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