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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Osawa 24-43mm f3.5-4.5
Filter Size:
Lens mount:
Aperture Range:
Close Focus:
Macro Ratio
Year Introduced:
Tested with...
67mm
n/a
f3.5-f16
n/a
1:6
1984
Eos M3

Osawa produced lenses until 1984. Some of their lenses were quite good while others were quite average. It's trial and error to find a good one.
This lens is a bit too complicated for its own good. Focus throw is quite short. Focus and Zoom rings are heavily dampened, too heavily dampened. The aperture ring is also dampened too heavily. Adjustments on this camera are slow to make. The lens has a macro mode which engages by poulling the zoom ring down at 43mm. This procedure is actually easy to do. After testing the lens I understand why macro mode is friendly to use.
Image quality outside of macro mode is average. It's soft at f3.5 and doesn't tighten until f8. Contrast is quite low thru the entire zoom range and at all apertures. Fringing is noticeable at f3.5- thru f5.6 and color rendition is flat. There is noticeable vignetting at 24mm. They seemed to mfg this lens to be average at all settings, except macro.
In macro mode the lens comes into its own. At f3.5 it is soft but it tightens up at f4 and actually gets sharp at f5.6. Contrast is also much better in macro mode. At f11 it is quite sharp, but bokeh is a bit distracting.
Bokeh fringing is low but seems to be present at all apertures. It is likely that bad coating is responsible for this color shift.

ISO 800 - f4

ISO 200 - f8 - Macro 1:6

ISO 200 - f5.6 - Macro 1:6

ISO 200 - Macro 1:3 - F3.5, F5.6 and F16

ISO 200 - Macro 1:6 - 100% crops - F3.5 and F5.6

bokeh fringe - f3.5 - click to view

bokeh fringe - f4 - click to view

bokeh fringe - f5.6
- click to view