Welcome to this mini photography tip to help you with your camera and to get better photos!
If you want to catch up on all the tips in detail and in one hit then sign up for one of my photography workshops, there's one for everyone, click on the link below then scroll through all the different workshops I have available. From an educational workshop to a photography experience, I am always there to guide you to ensure you get the best photos and improve on your photography journey.
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This photography tip is about aperture.
Every lens has a variable aperture designed to control the amount of light it lets through to the sensor (or film) on your camera.
The size of the aperture is annotated by an "f number" or "f stop" e.g. f4, f7.1 or f11. The smaller the f number the bigger the aperture. Below is a good diagram to show that. The size of the aperture is set by a number of aperture blades which varies from lens to lens.
Aperture makes up one of three components of the "exposure triangle" which control and set "correct exposure". If any one of the three are changed, at least one of the other components must change also to maintain correct expsoure. See diagram below.
Aperture has two main functions in photography. One is to control exposure by letting a set amount of light in and the other is for depth of field.
Depth of field put simply is the distance either side of the focus point that is in focus. A large aperture (f2.8) will have a shallow depth of field and a small distance either side of the focal point. A smaller aperture (f16) will have a lot larger distance either side of the focal point leading out to infinity (depending on aperture) so generally the vast majority of your photo will be in focus. There are other factors which this depends on also like the focal length of your lens, but typically for say a landscape shot taken with a wide angle at f16 your whole photo will be in focus if your focal point is set right. There are apps for checking and setting depth of field which are handy tools. A good one I use is called Lumariver DoF.
Here's another good diagram which shows depth of field.
I hope you enjoyed this photography tip. Feel free to ask any questions here or send me a message or email.
Till next time, happy shooting.