ƒ16 is just a starting point. If you want to use ƒ11 then you need to boost your shutter speed to 1/200 (in the case of ISO100). 2.8 is 5 stops brighter than ƒ16, so you need to go up 5 stops on your shutter. In other words, a bright Sunny 16 rule- sunny day is 1/3200 ƒ2.8 at ISO 100. You can use the sunny 16 rule with any aperture you want, not just ƒ16.
I chose this pin because this pin shows me the different types of exposure. I really like this pin because it tells the name of the different types exposure ,and what I'm looking for when I'm using that type of exposure.
exposure cheat sheet (open aperture f2.0 f2.8 f3.5 /less depth of field = good chalk picture fuzzy blackboard picture vs closed aperture/ The more closed the aperture, the more depth of field. (good mountain pictures) closed apertures f/11, f/16, f/22