I got this lens for my Panasonic GM-1. At first this lens was underestimated on the internet but once I received it I tested it, this lens delivers very sharp images. I personally find the control and rotation of the lens quite pleasant. Although it's a bit noisy when autofocusing, it does a good job. If you are a student and don't have the budget for f1.7 I would recommend this. A&R photo kindly provides a lens hood and all necessary accessories. which I give 5 stars for good service.