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Message: <blockquote data-quote="Neil" data-source="post: 3181745" data-attributes="member: 1568">Most of the long time digiscoped shave tried lots of combinations over the years. The Panasonic 20/1.7 is a short pancake lens which is very bright. This means you can get fast shutter speeds at low ISO. An advantage when Digiscoping moving subjects. According to DxOMark the Sigma 30/2.8 is very sharp. I only use it on subjects that are over 50 metres away. The 20/1.7 is on my camera 80% of the time. Not all lenses are created equal but the 20/1.7 is the best value for money in my bag. Quality of light and distance are a more important variables these days than the differences between cameras and attachment methods. Neil</blockquote>