Exposure in dental photography
This article is part of chapter 1 of the Book “Layers” By Dr. Jordi Manauta and Dr. Anna Salat, available in September 2012 by Quintessence Books. The difference between a beautiful picture and a terrible picture reside most importantly on the lightning.
Regardless the camera, objective or flash brand, every modern “reflex” camera comes with a lightning exposure regulator.
Our suggestion on the equipment is to have a reflex camera capable of communicating with a TTL flash, of course a TTL flash (point flash or ring flash depending on anterior or posterior) and a 105mm objective.
We will do an easy exercise to optimize and understand the lightning in our pictures, this task requires a 10min exercise with the camera and a model or a patient.
We should start programming the camera at f32 (diaphragm), 1:1.5 (focal distance) and 1/200 (speed).
Then we will take 25 to 50 pictures depending on the camera.
The camera should be set at -3.0EV (flash compensation) and take a picture, then move to the next step -2.7EV, take another picture, then at -2.5EV, -2,3EV and so on, until we reach +3.0EV.