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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Nikkor H 28mm f3.5
Eos 6D - Full Frame
It's a NIkkor. I've only taken a few shots with it on my 6D but I don't need to take many to know that its a good lens.
My copy has been factory Ai'd and is in excellent condition. Focus is light yet smooth, just like every other Nikkor from the F era. Aperture clicks firmly in full stop increments. Focus throw is a long 1/2 turn which allows for precise focusing from 2 feet to infinity. It is all metal and glass yet lightweight. It will balance well on any film or digital body. Focusing on the 6D was somewhat difficult because of the long focus throw. Thankfully, it is so sharp that it allows for focus errors.
Sharp isn't a strong enough word for just how sharp it is. Yes, it is a tiny bit soft at f3.5, but at f5.6 it is razor sharp. It's razor sharp corner to corner. At f3.5 there is strong vignetting and extreme corner blur but there is rarely a reason to shoot a landscape wide open. Don't misunderstand me. This lens very usable at f3.5.
Distortion is minimal.
Bokeh is a bit busy past f3.5 but this lens is made for landscapes and architecture. Bokeh is not a concern.
Contrast is excellent at all apertures.
Color rendition is a tad cool but very consistent.
I haven't noticed any fringing but I haven't taken any harshly lit pics. Bokeh fringing shows as a gradual warm to cool shift. This is not a concern because it is unlikely this lens will be used for macro work.
This lens produces excellent b/w images. Set it at f8 and shoot street pics in b/w. I think you'll be pleased with the results.
f3.5 - 100% crop
f5.6 - 100% crop
f3.5 & f5.6
f3.5 - The vignette works well here.
f5.6 - Simple b/w conversion.
Bokeh Fringing Test
f3.5 - 100% crop