I have owned it for 3 years. It was bought in Pattaya. It is practically a regular lens on rm1. A good focal point. It is sharp in the open both in the center and along the edges (in a ravine!) In a jeep, the edges are washed away due to software correction of distortions. It helps a lot on trips, because it takes up little space. And in winter, for pm1 + 17 2.8, there is simply no alternative. fits easily into a jacket pocket. Quite decent glass for the price.
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