Aperture
I am just starting to learn about photography. I have been trying to understand aperture and I have a question. I think I understand what aperture is and how it affects depth of field.
Ive been watching tutorials and stuff on YouTube about variable and fixed aperture lenses where they talked about a 70-300 f/4-5.6 At 70mm the aperture is 4 and at 300 its at 5.6. The videos also talked about zoom lenses that have a fixed aperture like a 70-200 f/2.8.
Why do I set the aperture on my camera if my lens is already at a certain aperture?
Thanks in advance for your time.
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