What Is A Diaphragm In Photography

The diaphragm is the part of a camera lens which is made up of a series of metal blades which create a hole. The opening regulates the amount of light which reaches the image sensor. Commonly it is also known as an iris diaphragm due to its similarity to the human iris. The blades are …

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What Is TTL In Flash Photography?

TTL stands for ‘through the lens’ and in photography it is referring to through the lens metering. Metering is basically another way of saying how the camera measures the light in a scene. So putting the two together, basically TTL metering is how your camera will measure the amount of light coming through the lens …

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