Sorry to drag this on, but i think i have a simple way to explain the aspect ratio, and the wider FOV. If you have a smart phone, take a picture in 16:9, then take a panoramic, this is a dramatic example but, you will see that the panoramic has a much wider FOV obviously but you will also notice that the height of the panoramic picture is much less so and you have black bars. This is basically because, in order to fit the whole picture into the screen it needs to be zoomed out because of the width of the X axis but the y axis is the same as in the 16:9 so as you zoom out it seems to shrink. If you zoom back in to fit the y axis onto the screen without the black bars you lose the right and left edges of the x axis... I wish i was good at graphic design so i could just show you with a picture or diagram, but as i said before, the 3 first pics in your OP show that.







