there are plenty of samples of the 50mm f1.0 where the bokeh is negatively affected by intrusions of the mirror box but you can also see the same problem on f/1.2 lenses to a lesser extent. It makes for ugly artifacts in particular point light sources that creates the "spheres". Similar to "cat's eye", but worse....much, much, worse because the spheres are clipped in unnatural ways with weird angles and geometric intrusions.Yeah, I somehow read that wrong. Still, 1mm means little. Bokeh is complex. I don’t think flange difference is going to make a difference. Again, Leica has been doing this for 100 years. Usually their bokeh is very good, but not always.
https://fstoppers.com/gear/ultimate-lens-bokeh-canon-50mm-f10-5059
yuck.
a broad mount that is closer to the sensor will not have these problems, and I suspect the 58mm f/0.95 will have much less instances of box intrusion. Cat's eye is inevitable however, but that is not as distracting. Nikon engineers also said they picked the dimensions and flange to make designs easier, more telecentric, and/or that require less light bending or arriving at sharper angles on the sensor edges. Some of this may be more evident once there are more high end lenses on the Z mount, as I doubt you'll notice much different on the rather conservative 1.8 primes.
Also in the same interview, they indicated there may be faster glass coming, so maybe that patent for the 52mm f/0.9 is one of those lenses in the roadmap that Nikon didn't write anything on and just left a slot.
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