Rectilinear test 3
In response to the question of what purpose the Rapid Rectilinear lens serves, I took a series of photos of the same subjects--one with the external rectilinear lens in place, the other using only the internal lens.
Obviously, on my camera at least, the rectilenear lens is required! I was startled by how unfocused the images from the internal lens were, given that plenty of other people are able to take fine photos using only that lens.
My tabletop studio where I take a lot of my macro photos. Note curious cat in the foreground.