We will now talk about the aperture in more detail. If you read our previous post on The Exposure Triangle you now know that the Aperture is the size of the opening in the lens that lets light pass thru it to expose a picture.
This is a typical aperture scale
BIG/FAST F1.4, F 2, F2.8, F4, F5.6, F8, F11, F16, F22, F32, F45, F64 SMALL/SLOW
I'm not going to bog you down with why they are numbered like this and give detailed info on the construction of lenses. I'm not saying don't learn this but to be honest I don't feel knowing all that is needed. I will always try my best just to give you what is needed to operate your camera and take better pictures.
ok moving on, the size of the aperture is the key factor when most photographer buy new glass, faster is better, simply put. lol just look at the price of some fast glass. the bigger your aperture the less light you need to take a photo.
PLACES AND SITUATIONS WHERE FAST GLASS IS NEEDED:
- Concerts
- Sports Photography
- Shooting at night
- Weddings
- any place that doesn't allow flash photography
- when you want a shallow DOF Depth Of Field
Depth of Field, what's that?
Depth of Field is basically how much of your picture is in Focus.
Ok, well don't I want my entire photo to be in focus?
well nope, not all the time. I know you have seen the photos of flowers in a Field and... Well let me see if i can find some free stock photos I can use to help demonstrate DOF and why it is important.
ok, I'm back and I can't find what I'm looking for so just watch this video on Apertures and DOF.
Video on aperture
Depth of Field Video
We all still on the same page? Ready to move on to Shutters?
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