Another macro image, titled "How'd you get into the bottle, cap?"

How'd you get into the bottle, cap? by simple.joy, on Flickr
It was shot with a Steinheil Optronic lens (no focal length mentioned, but it might be around 50-60 mm and it has a maximum aperture of f/2.8). This simple triplet lens was used in a so-called Oscillophot, which was a camera meant to capture images of an oscilloscope. Doesn't make any sense? Well, wait until you hear about some of my stranger lenses. 😂
Why would you adapt this thing, you ask? Here's another image, but just meant to show some of the bokeh-qualities (or probably lack thereof in many people's eyes 😉) of this peculiar piece of glass:

Wide open by simple.joy, on Flickr
So please don't go and criticise the lighting in this one... 😱 of course there had to be some compromises.