Aperture!
Hey Photo World here we are on another Fundamental Friday’s episode and I am so excited to bring us back to the basics of Aperture. Many of you already know that aperture plays a big part in depth of field and I am only going to scratch the surface on that piece to the aperture puzzle. Today I am really dialing back and walking us through the basics of aperture. Simply put it is the opening in the lens. Furthermore it is adjustable by you the photographer. There are many cameras out there where you would have a fixed aperture however I am speaking to those of you who are DSLR, hybrid, or mirrorless shooters. Basically those who have the full manual options to make exposure changes. Your aperture is the opening in the lens and the part that allows for that to be adjustable are a set of blades coming together making a larger or smaller hole. The numeric value assigned to each step or Stop are referred to as the F number or F stops.
Example of full stops:
F1.4, f2, f2.8, f4, f5.6, f8, f11, f16, f22, f32, f45, f64
F number… Aperture… blades… the hole in a lens…
What does all this mean?
Well, what aperture is designed for is – regulating how much light passes through the lens and therefore how much or how little of the scene is being projected onto the film or digital sensor. The F number tells us a few things:
1) the smaller the F number (like: f2.8) the bigger the opening in the lens and therefore more light passing through.
2) the larger the F number (like: f22) the smaller the opening in the lens and therefore less light passing through.
3) Aperture effects the Depth of Field – small aperture (large F number) the longer the DOF/large aperture (small F number) the shorter the DOF.
Again and just like Shutter Speed this is one third of the exposure triangle. (the 3 main setting that determine our exposure for an image)
Shutter – how long the picture is taken
Aperture – how much light is passing through the lens
and
ISO - … tune in next week (episode 63) to find out how this triangle is completed!
I also discuss how Aperture effects Depth of Field however I have that topic set aside for a future Fundamental Friday’s episode.
Hey Photo World pros! Comment down below to help out the newer photographers joining the Photo World!
Stay Cool and Happy Shooting!
Rob