Sigma 19mm - why buy the Sony 20mm?

Started Jan 29, 2013 | Discussions thread
Marchellome Junior Member • Posts: 41
Re: Sigma 19mm - why buy the Sony 20mm?

The Sony Ultra-wide adapter works fine on the 20mm pancake and definitely sharpens the corners over the mushy 16mm corners. It basically turns the 20 into a sharper 16. However, the fish-eye adapter doesn't fair as well with corners being even mushier than the 16mm by itself. As Sony stated early on, the converters were designed for the 16mm, not the 20. However, the 20 + UWC set-up gives you a sharper 16 and 20mm AOV than the 16 lens by itself or cropped to 20.

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