The focal length of a camera can make you look fatter because it makes your features seems flat and barrel distortion can make straight lines look curved thus making you look a little plum. However, these same effects can cause other lenses to make you look thinner.
How to avoid the plumped look?
In all honesty, the plumped look is not the fault of the model. This doesn’t have so much to do with the model as it has to do with the photographer. Since the photographer is the one shooting he or she has to take precautions and make preparations like having good lighting, the right equipment, skillful and helpful assistants and a good camera before every shoot. The model just has to show up.
To eliminate or minimize this ” fat look” problem that many skinny models face a fashion photographer should utilize all his experience and put into practice his knowledge during the shoot. The fashion photographer should shoot from the best possible angle since angles can be your best friend or worst enemy. Angles determine if the face will look fuller or narrower. A good photographer knows this and tries to shoot from above.
The distance between the photographer and the model should be just inches apart to not have the model look fat. Perspective has everything to do with it. In photography the closer the camera is to the subject, the narrower the face will appear.
To create the perfect shot a photographer should just be inches away from the model because being too far away can have the model look heavier. That’s why we all seem so heavy in our family photos because they are being taken from a greater distance.
Have the model try different poses and shoot from the best possible angle. Many times you’ll notice celebrity slightly turn their bodies sideway when they pose for the paparazzi, this is because it makes them look slimmer. Positioning your arm on your hip can also make a huge difference.