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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SMC Pentax A 50mm f2
Filter Size:
Lens mount:
Aperture Range:
Close Focus:
Macro Ratio
Year Introduced:
Tested with...
49mm
Pentax K
f2-f22
.45 meters
n/a
1985
Eos M3

I must admit that this is the first Pentax K series lens that I've shot with. I used Ricoh lenses when I was young. I expected this lens to image like a Takumar but it actually doesn't. In some respects it is better but it does have its minor faults.
This lens handles very well on the M3 mirrorless body. It is lightweight and easy to focus using the optional EVF finder. The aperture ring turns freely and it balances very well in hand.
It is tack sharp wide open with excellent contrast. It is sharp corner to corner. I'd say it is sharper than the 55mm f1.8 SMC Takumar. Bokeh is pleasing thru f5.6. Fringing is minimal and color rendition is very accurate but bokeh fringing is noticeable passed f5.6. Keep that in mind if you plan on shooting close-ups with this lens.
So then, what's not so good? Flare. If you shoot in the general direction of the sun you will see a significant loss of contrast across the frame. If you shoot toward the sun you will get sharp, hexagonal flare. The build quality is a but disappointing too. The lens feels cheap.
Would I shoot with it? Absolutely Yes. If used properly this lens is capable of striking images and it feels comfortable.

ISO 400 - f2 - 100% crop

ISO 400 - f4

ISO 400 - f4

ISO 800 - f4

ISO 800 - f2 - 100% crop

ISO 200 - f5.6 - 100% crop

ISO 400 - f2

ISO 100 - f5.6

ISO 400 - f4 - 100% crop
Incredibly sharp

ISO 800 - f2.8

ISO 200 - f5.6 - 100% crop

ISO 400 - f2

ISO 400 - f3.5

ISO 400 - f2

ISO 400 - f2

ISO 800 - f2

bokeh fringe - f2

bokeh fringe - f2.8

bokeh fringe - f4

bokeh fringe - f5.6