Collecting Subjects for Portraits
If you don’t have a portrait model then you can always go out and capture some subjects. If you are a sketcher you are going to have to learn to work fast and discretely. You’ll need a very cool temperament and you’ll have to learn to use your short-term memory because people will get up and disappear in the middle of it. If you want to take photos obviously you don’t want to go around offending people by sticking a camera in their face without asking them. The problem is that if you do ask them you’ll get one of two responses, an uncomfortable decline, or even worse, the opposite, a pose and an awful cheesy grin. The solution could be the zoom lense. This means that you can easily make sure that people don’t even realise that you're taking a photo, particularly in a large crowd. However, beware. The human eye is approximately
equivalent to a 50 mm camera lense. The more you deviate from this
lense length the more the perspective of the image becomes distorted
and the less 'natural' your portrait will look.