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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Pentacon Filter Size Chart
Pentacon (various mounts)
Prakticar 28mm f2.8 MC
auto 29mm f2.8
30mm f3.5
electric 50mm f1.8
Auto 50mm f1.8
Prakticar 50mm f2.4 MC
50mm f1.8 Multi Coating auto
Prakticar 70-210mm f4.0-5.6 MC
AV 80mm f2.8
100mm f2.8 auto
AV 100mm f2.8
auto 135mm f2.8 MC
Prakticar 135mm f2.8 MC
150mm f2.8
200mm f4
200 mm f4.0 Auto MC (6 blades)
300 mm f4
500 mm f5.6
49mm
55mm
49mm
49mm
49mm
49mm
49mm
52mm
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49mm
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60mm
55mm
--
58mm
58mm
95mm
118mm