Continuing on unusual/uncommon lenses, the good old "fish-eye" lens. There are two kinds. The first kind, the circular fish eye is what most people think of. The image covers a circle inside the image sensor, getting light from 180 degrees in all the axes.

Here is an example of that where I took a picture using such a lens.

#photography #fisheye #lens #auxiliarylens #fuji #Spiratone #camera #fujiXT20 #fuji_xseries #naturephotography #artphotography

This picture is called "Dendrites", 2021