Kowa Prominar 8.5mm f/2.8 tested at Photozone.
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Photozone (Click here) published the full [shoplink 54790 ebay]Kowa 8.5mm MFT lens[/shoplink] review:
Now while the lens is certainly good, it stays somewhat short of this expectation at least. The center quality is great and the borders are also very sharp at mainstream settings. The extreme corners aren’t quite as convincing though. They are downright soft at f/2.8 and it’s a good idea to stop down to f/4, better f/5.6 where the results are decent. The vignetting is also higher than usual especially at f/2.8. A downright stellar performance is the lack of distortion – probably the best ever measured quality here and we are talking about the native characteristic and not about a digitally corrected result.
The Kowa Micro Four Thirds lenses on eBay:
8,5mm f/2.8 in on [shoplink 54790 ebay]eBay (Click here)[/shoplink].
12mm f/1.8 in [shoplink 50867 ebay]Black (Click here)[/shoplink], [shoplink 50868 ebay]Green (Click here)[/shoplink] and [shoplink 50869 ebay]Silver (Click here)[/shoplink].
25mm f/1.8 in [shoplink 50870 ebay]Black (Click here)[/shoplink], [shoplink 50871 ebay]Green (Click here)[/shoplink] and [shoplink 50872 ebay]Silver (Click here)[/shoplink].