Andy Coulthurst wrote:Given the lens is originally intended for B4 - I am also impressed.
There are some definite fringes - and there is rolloff from both the lens and adapter - and there is a loss of definition to the corners. It certainly appears to resolve better than HD.
Yes Canon and Fujinon continue the tradition of their old marketing tricks - SD, HD, 4K and 8K nominal lenses. A lens is not like an OLPF, cutting off at some arbitrary resolution. Canon used to wheel out the great Larry Thorpe to justify scientifically you spending 3 x on a HD or 4K lens, without so much as an MTF chart in sight to prove it - I hope he's well and still going strong. For the 4K UHDxs CJ12e 4.3B, for example Canon state "Thanks to the precision of its high-grade components and assembly, the lens achieves high 4K lens camera performance even when the built-in 2x extender has been engaged." - how is that even possible? Is it then an 8K lens, really?
8K Eng lenses required the need to go to a 1.25" mount, not because of the limiting capabilities of resolution from 2/3" lenses but because the the 9x6mm sensor would necessitate a pixel size of around 1.1microns, which is impractical on all fronts, professionally.
I should start by testing the J16 I have at hand, since that seems to clearly exceed SD rez and even HD to my unscientific eyes. Then I'll try and rent a HJ21 and one of these adaptors.