Reverse mounting a lens is a common practice for giving macro capabilities and I wanted to give it a try in the wild but doing so can be somewhat tricky as the lens itself often gets in the way as the focal distance is measured in millimeters.  This is what I got from a standard reverse mounted 50mm lens.

The wider the lens, the more dramatic the macro effect becomes but the more light is required and the thinner the plane of focus.

At a full 17mm at f/4.0, the focal plane was thinner than I could make out with my eye.

The longer the focal length of the regular lens the weaker the macro effect is, which can be good when you want more distance to work with a la:

BEES!

The variable focal distance could lead to some odd cases like geometry such that the plane of focus was inside the lens.  200mm and focused at 4 feet near f/11 led to a depth of field thick enough for actual pictures of things.

YOU CAN MAKE OUT BOTH SIDES OF THE PETAL!