When shooting a portrait photo, you will be faced with several challenges that you need to overcome to be able to get a perfect result. There is the matter of shutter speed, which becomes something sensitive especially when you are holding the camera by hand unaided. To eliminate risks of camera shake, you need to settle with a shutter speed that is not higher than the lens’ focal length. A good rule of thumb for this subject would be to stay away from a shutter speed that is lower than 1/60 if you are using a 50mm lens. Of course this is just an example.
And let’s not forget about the matter of determining the proper ISO and aperture for the portraits. Try going for f/5.6 if you are not trying to get it with the slimmest depth of field and you will be shooting something longer than 85mm. You can also make use of strobe lighting for commercial portraits like in Nontonfilm88 website. You can use the fill to its full speed range (ISO). Keep in mind to set the ISO as low as possible in order that the resulting photo appears to be of great quality and has its noise reduced.
You can try to create a lighting setup for a portrait that is of full length. Get large light modifiers or choose softboxes. For lighting coverage that is even and good, set them back from a subject. You can opt for a softbox of 4 x 6 dimension meant for even distribution in the front coupled with another light source coming from behind the subject to better define edges as well as to give the photo some highlights too. You can make use of umbrellas as well. Choose one that has silver linings as it may reflect light that is more contrasting as opposed to a white one. White umbrellas, however, is enough but in order to get more contrast, you should move it a little further away from the subject.