Lens apertures may seem confusing but with a little practice you'll be an f-stop master.
What is aperture in photography?
The Exposure Fundamentals Behind Great Filmmaking
16 Unusual Lenses Every Photographer Should Try
Difference between T-STOP and F-STOP
Mastering the F-Stop: A Guide for Photographers Who Don't Love Math
What Is the Difference Between an F-Stop and a T-Stop?
NAB 2017: The Latest and Greatest Camera Lenses
Understanding Lenses: Aperture, F-Stops & T-Stops - The Beat: A
What Is the Difference Between an F-Stop and a T-Stop?
F/4 vs. F/2.8: What's the Difference and Why Does it Matter?