I’ve always wanted to take pictures through a microscope so I can see what tiny screws and coins look like when magnified, but I don’t have the money to purchase that kind of equipment. DIY!
Searching on the Internet revealed I could get some really high magnification without any significant expense if I mounted an SLR prime lens backwards onto a telephoto lens. I had both the lenses, but they were for an older Canon film camera, and smaller in diameter than the lens on my Nikon D3100.
I quickly came to the conclusion of lining one up with my point-and-shoot and using the optical zoom as the telephoto component. The results were astounding!