I = Iris | A to Z of Videography
I – Iris in the A to z of Videography 📸
The Iris in the camera works similarly to the human eye. It can open and close dependant on the lighting conditions therefore controlling the light.
Now the Iris and the aperture are quite different. The aperture is adjusted in accordance with the depth of field, but the aperture also can be used to adjust light settings.
So the difference:
Iris: The Iris is the adjustable opening that can restrict the amount of light that enters the camera. It’s the shutters and springs that open and close.
Aperture: The Aperture is the hole in the opening of the iris. A wide aperture (low F-Stop) lets more light in, while a narrow aperture (high F-Stop) restricts it.
You can also adjust the light through using ISO as well but don’t rely on this to brighten up your images as it can result in grainy images you need to make sure you have the correct lighting whilst shooting.
Now there’s different types of irises and they all work slightly differently so pick the one that’s best for your shoot:
Fixed Iris:
On a fixed iris, the opening that lets the light in the camera cannot be adjusted.
This type can be great for indoor filming as the lighting tends to stay consistent.
Manual Iris:
With a manual iris you can adjust the opening yourself to adapt the amount of light being let in or out. However, this adjustment is typically done during installation when you have easier access to the camera.
This type is typically used the same way as fixed iris as its difficult to change during shoot.
Auto Iris
Auto Irises are motorised, allowing them too automatically adjust.
Auto irises are used in more advanced technology which results in a more expensive camera however they are great when recording in outdoor locations.
P-Iris
P stands for precise. This is because the iris uses both the ability to automatically adjust like an auto iris with controls on the camera to create improved video quality and depth of field.
It’s a lot to take in and there’s many elements to a camera but my best advice is to just play around with your settings to get the best results!
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