One advantage of the Sirui 18mm lens on the iPhone SE2020 is the amount of foreground you can include in your landscape images. By limiting the sky to the top third of the image, you can create landscapes with a lot of foreground detail and an interesting perspective. Of course the same advantage applies whether you are using the Sirui, or the ultra-wide lens built into your phone, or even an ultra-wide on a mirrorless or DSLR style camera. Sirui 18mm lens on the iPhone SE2020 with the Moment thin case. Native Camera App on Auto.