Hi, I'm the Ellen with Photo Focus with a Studio Tip. Our Studio Tip is how to control light using SIMF oil. Now SIMF oil goes by many different names. Basically it's black aluminum foil. The difference between this aluminum foil and what you have at home, this is very, very sturdy and thick and it's reusable. One of the uses we could use it for is controlling the direction of our light. Imagine you want to throw a beam of light on a certain part of a photo. What you're going to do is create what's called a snooze. So we're going to wrap the sit foil around the speed flash. And then from here, either open the opening a bit larger or stop the opening down and this will control where the light is hitting on the scene. Now that's great if we want to focus in pinpoint light. We could also use it if we want to take a weight light. This is called a flat. So imagine I have a studio strobe and I don't want the light to affect the background here. We're going to take a little bit of the gaff tape and the SIMF oil we're going to create a flat. We're going to take it, wrap it around here and come across. There we go. And now we could position the flag to where the light is not going to affect the background of the subject. I'm Benelli with PhotoFocus. Thanks for watching.