Quantaray 500mm f8 Mirror
Most Quantaray lenses were made by Sigma and some were made by Tamron and Tokina. This lens performs like a Sigma Mirror lens. It is reasonably sharp if you can hold it steady. It has the typical ringed bokeh we see from mirror lenses. Contrast is surprisingly high. While it is not a Zeiss or even a Tamron in quality, it is still far better than any of the off-brands flooding the market.
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Kowa Filter Size Chart
Digital
12mm f1.8 Prominar MFT
8.5mm f2.8 Prominar MFT
25mm f1.8 Prominar MFT
72mm
86mm
55mm
Medium Format
19mm f4.5 Fish Eye
35mm f4.5
40mm f4
55mm f3.5 I
55mm f3.5 II
85mm f2.8
150mm f3.5 I
150mm f3.5 II
200mm f4.5
250mm f5.6
500mm f8
110mm f5.6 Macro
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95mm
95mm
86mm
67mm
67mm
77mm
67mm
67mm
67mm
95mm
67mm
35mm
500mm f5.6 Prominar FL
Kowa Optical Works 50mm f2
95mm
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