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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Olympus Zuiko Auto-T 135mm f2.8
Filter Size:
Lens mount:
Aperture Range:
Close Focus:
Macro Ratio
Year Introduced:
Tested with...
55mm
Olympus OM
f2.8-f22
n/a
n/a
1977
Eos 6D - Full Frame

Wow! This is a great lens. In typical Olympus fashion it is a pleasure to shoot with. Handling on the 6D is effortless.
Sharp! Sharp from f2.8 up and from corner to corner. This lens is sharp with absolutely no visible falloff in the corners of any kind.
Image rendition is excellent. Bokeh is very natural and quite smooth wide open. Colors are spot on. Contrast is excellent and very consistent. Shadow detail is crisp.
The only negative I could find is a bit of fringing at f2.8 in extreme lighting. Really, it's very minor.
The possibilities with this lens seem endless to me. Cityscapes, landscapes, portraits, studio, macro (just add a few extension tubes), Grayscales images look quite nice thanks to the beautiful contrast of this lens.
See the comparison pic below which was teaken with a Canon 100mm f2.8 USM Macro.
6D

f4

f2.8

Canon 100mm f2.8 USM - f4.5 - 100% crop
Comparison of quality to Zuiko 135mm

f2.8 - 100% crop - extreme corner

f2.8

f4 - b/w

f2.8 - tight crop

f2.8 - 100% crop

f2.8 - 100% crop

f4

f4

f2.8 - tight crop - b/w

f2.8 - 100% crop - b/w

f4 - b/w

f4