Very satisfied 482

This is a screw-on lens diameter 58mm objective.
The bundle contains a ring to fit on a 52 mm lens.
It helps greatly expand the field width at the cost of heavy distortion.
The first tests show no big chromatic aberrations (used with Panasonic G3 + 14-42 kit), but rather a loss of sharpness.

I chose it for the price, with the idea to make very wide panoramas, see nice fixtures (using Hugin, for example)
I can not compare it with a real "objective" fisheye, but for 2-3 frames per trips for which I use it fully fulfilled its function.

The only negative for me is the lack of a protective cover for transport to 52mm when the adapter is screwed on this objective.