What is this ?
Old canon lense 28mm as retro with a 2*converter at my Nikon D300.
Size of the objekt 4mm. So, as full frame, it is a macro 6:1.
The range of sharpness is about 0,5 mm. Light was a maglight.
A retroring you can get for 25$ for every camera.
So don't throw away your old lenses.
I want to show, what is possible with little money.
Hope it is interesting for you.
Yes, a peppercorn. Full frame !!!!!!