>>3679886>The output of anything focussed at 50cm or less is unusable. My 4 year old phone does a better jobIt's not a macro lens.
The optical path changes quite a lot when focusing obejects so close.
To get the optical path to be closer to what it's supposed to be, reverse mount the lens, stop it down to f/8 or higher and use the shortest focal length.
Depending on lens and camera, you can get 1:1 to 4:1 macro that way with acceptable quality.
The Canon 18-55 mm kit lens for example is known to be great for that, a cheap reverse-adapter usualy does the job.
Pic kind of related, a part of a microSD card and a hair photographed with an 18-55 mm kit lens reversed and cropped.
