I think a 30mm 1:1 macro lens is a goofy idea. The 50mm macro lens requires you to be within 7.5 inches to get a 1:1 image. A 30mm 1:1 macro lens will require you to get within about 5 inches! At that distance, you'd be blocking your own light.
For macro photography, focal length is your friend.
- The lens is the thing.
- 'Full Frame' is the new 'Medium Format'.
- "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.