Originally posted by Dewman Beautiful shot, Jorgario. Amazing color and sharpness. For a guy who's only been into photography for a year and a half, you're producing some wonderful imagery. Very nice bokeh and your DOF is perfect. Nice composition and lighting, too. Bravo.
Reversing rings can be found on eBay for less than $5.00 and they're quite easy to use. Like all different facets of photography, it will take a little experimentation, but it's pretty simple, actually. I would suggest that you try it on a bright, sunny day. Good luck and please, show us your photos.
Reversing rings are the best. As a rule of thumb, the magnification (which is fixed - the focusing system does nothing) at the registration distance (mount to sensor) is in inverse proportion to the focal length of the lens.
A 28 mm on full frame (film) example was when a co worker had a dispute with a jeweler who had resized a ring and basically trashed it. She asked if I could help. I mounted the M 28/3.5 reversed on a 49-52 step up with a 52mm reversing ring on my KX (film, guys). Measurements give this rig about 2.1X measured on the slide or print without magnification, a bit more than technically correct because of the extra thickness of the step up ring. We printed an 8x10 showing the gouges he had done. In small debts court she held up the print and the jeweller caved.
The formula works out pretty closely to the ratio of the lens to 55mm. Adding a bit of extension will increase it.
When using reversing rings, you run out of depth of field right away. There isn't any to speak of. This is a rig that needs stands, lights and tripod. To get enough depth of field to show the file marks in the gouges the lens was stopped down to f/22 while using portrait lights at 45° from either side with the ring held in a vise.