I was reading a post, the other day, by a fellow blogger, about extension tubes. You can read the post here and you can also take a look at his blog Filmosaur.
Back in 1989 I bought my first “decent” camera, a Nikon FG20. I was about to go to college and I wanted to step up from my father’s Yashica Minister D, which I still have. I must have taken about a zillion shots with the Nikon.
At one point we were experimenting with macro photography in college and my teacher told us that we could get something called an inversion ring. 25 years ago, on the dark ages before the internet, extension tubes were a thing for professional photographers. They were very expensive and it would take about 6 months to get them to Portugal. That was a whole semester.
Even inversion rings were hard to find and also expensive. We were students and, of course, always broke, so my teacher told us to just take the lens of the camera, to flip it around and to press it steady against the camera body. Doing the same thing the inversion ring would do but… without it.
So, these are my very first ever macro shots, holding a Nikon 50mm lens against the camera body.
My fellow Fimosaur, this is the kind of magnification you get using a 50mm lens.
Cooking Film 
Cool! I need to try this.
These are excellent. You can also buy a cheap coupling ring and mount a reversed lens (normal or, better, wideangle) on the camera’s normally-mounted lens. The setup is a bit bulky, but it doesn’t wobble all over the place.
Thank you Alessandro, things do change over the years… I’m getting old my friend 🙂
So am i. But then again, do you know anyone who is getting younger? 😉
ahahaha indeed! In science we must trust 😉