Exposure Lock (AE-L Button) is the abbreviation stands for Automatic Exposure Lock. It is useful using automatic and semi-automatic shooting modes. Where has this information been all my photographing life? So freaking helpful it's not even funny.
This pin is similar to the first pin, it has those fine white lines that show the proportion of the bird. I like how it shows the original image and then it transforms into a pixelated bird. Low poly, looks like a fun or frustrating exercise to do.