For its purpose almost perfectly

The 30mm macro is my number 3 in Nex7 lineup.
Actually, I did not need it, but because we, and she loves (wife and I m.) Are AT LEAST once a year on the Mainau flower pictures - I thought to myself, "Come, 250, - Euro are ok for it."

My demands on the macro were therefore not as high, but Sony has surprised me with the lens.
The relatively lousy edge sharpness at the Nex7 at open aperture I do not use to the devaluation of the lens, as it does not interfere with the actual use of flowers macros for me.

If you want to also use it as a standard prime lens, then you should stop down to at least 5.6 or 8 in order to achieve good results.

My Pro's and Con's:

++ Feel and build quality
++ Full interior focused (length remains constant)
++ Dimmed color reproduction
Dimmed ++ Focus
Dimmed + vignetting
+ Reasonable price right
o Figure 1: 1 scale only in extreme proximity of the subject
o bulky for a macro short focal length
- Feather at maximum aperture
- Vignetting at open aperture to 5.6

All in all a great value for money tip.
Vielleich Sony still has a slightly longer (60-70mm) macro on the roadmap. :-)