I talked with the Canon rep today. He checked in with their engineering department and he had not heard anything back yet. He's supposed to call me Wednesday (8/28) with an update.
Nikon 300 PF shows minimal vertical blurring on the 1 pixel level, without IBIS, for shutter speeds at around 1/125 s. The problem has been reduced, but not completely eliminated as per about a year ago. I haven't followed recent developments however. Don't know about the situation when you are using IBIS. If there is ghosting at the 3, 10 or 20 pixel level, this is most likely a different problem with different causes. From the information, IBIS implementation would be a prime suspect - as far as I know, IBIS is neither designed for supertele lenses nor for counteracting shutter impact.
AcuteShadows wrote:
Nikon 300 PF shows minimal vertical blurring on the 1 pixel level, without IBIS, for shutter speeds at around 1/125 s. The problem has been reduced, but not completely eliminated as per about a year ago.
No, the problem body and lens samples showed completely unusable results. It's not 1 pixel, it looks like the lens had been vigorously shaken during the exposure. Basically these images are blurry at any display size. However, not all 300 PF sample and camera body sample combinations show this effect as strongly as those who have an unlucky combination. I have used one 300 PF which showed this problem really severe but my own copy only has only mild softness at critical speeds in some situations, nothing to be too concerned about.
Anyway EFCS on the D850 (and likely Z6/Z7) solves the issue when suitable modes are used, and leads to a marked improvement in sharpness (even with well-behaved PF lens samples).
