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It's a server/compression problem. I can't play anything about 2K on Vimeo but have tried 5K on YouTube.vimeo @ 4k never seems to play smooth for me though unless it completely buffers in the full clip. 2012 mac pro 12 core / 64gb / Titan X 12gb / 42.5" Dell 4k / High Sierra. anyone else have issues with Vimeo and 4k? i can play 8k clips on youtube no problem.
david
NorBro - did you ever run an IQ test of 4k60 FF vs crop? I'm guessing FF looks like low-quality 4K and crop looks like 5.1K oversample but I'd love to know
Most of the reports I have seen so far suggest that the EF to RF speed booster performs pretty much the same with respect to autofocus as with using EF lenses on an RF camera using a standard adapter.My only issue with using a speedbooster (aside from an unacceptable purple veiling flare I once experienced under really strong backlighting) is the autofocus. I doubt the metabones will maintain AF performance but I'd love to be proven wrong. Also, Canon may come out with their own speedbooster which would allay my concerns.
Most of the reports I have seen so far suggest that the EF to RF speed booster performs pretty much the same with respect to autofocus as with using EF lenses on an RF camera using a standard adapter.
And this would make sense given what we know so far about how EF lenses work on RF mount cameras. This is from a Canon information page about EF vs. RF lenses:
"When you put an EF lens onto the adapter, the EOS R understands that an EF lens is attached. So there's no need for translation between one lens protocol and another – it speaks to the EF lens in its native language, meaning no lag in communication speed for AF, real-time Digital Lens Optimisation, and accurate real-time focus distance information, which is displayed in the viewfinder."
https://www.canon-europe.com/pro/stories/rf-versus-ef-lenses/
This would mean that unlike most of the other speed booster models (such as EF to Micro 4/3 or EF to Sony E-mount), the EF to RF speed booster does not have to do any lens protocol translation because the camera communicates with the lens using the EF protocol.
The EF lens mount has 8 electrical pins whereas the RF lens mount has 12 pins. And while I don't think anyone has fully reverse engineered the RF lens protocol yet (or at least no one has published specs for it), the prevailing wisdom so far is that the additional 4 pins on the RF mount are used to control additional functionality on RF lenses. For example, these pins are likely used for the new control ring on RF lenses (which can be configured to control aperture or other camera settings), to configure the focus ring direction behavior (which is configurable on RF lenses), and to communicate IS information (for advanced lens IS + in-body stabilization). But when using EF lenses on an RF camera, the original 8 EF lens pins are most likely used in a direct pass through configuration in the adapter, to allow the camera to communicate with the lens directly using the EF protocol.
This tickled me
I don't but I'm not very normal with video production-101 instructions.
This will probably sound crazy, but I haven't shot a white source to obtain a white balance in like 8 years. I mainly would use external recorders and LUTs to see how people looked while scrolling through Ks. Sometimes a proper white balance will not be proper for your post-production workflow/vision.
Also, IMO, what's more important is how your camera sees under certain lighting because no perfect white balance will save you if your camera can't handle a variety of emissions.
This tickled me
This tickled me
I don't but I'm not very normal with video production-101 instructions.
This will probably sound crazy, but I haven't shot a white source to obtain a white balance in like 8 years. I mainly would use external recorders and LUTs to see how people looked while scrolling through Ks. Sometimes a proper white balance will not be proper for your post-production workflow/vision.
Also, IMO, what's more important is how your camera sees under certain lighting because no perfect white balance will save you if your camera can't handle a variety of emissions.
This is a good side by side comparison of the R5 and the C200, that goes over the following:
1) Canon R5 8K Raw vs Canon C200 4K Raw
2) Canon R5 4K MP4 vs Canon C200 4K XF-AVC
3) Canon R5 120fps Slow Motion vs Canon C200 120 fps Slow Motion
4) Canon R5 Image Stabilization
5) Canon R5 Overheating
Granted it is to be expected as it is an 8k full frame sensor vs 4k super 35, but the detail from the R5 is pretty stunning in comparison.
https://www.youtube.com/watch?v=W8E30IxSiDo