Ryan Constantino Posted October 22, 2018 Share Posted October 22, 2018 Hello, I recently purchased the GH5 vlogL upgrade from Adorama, and came across this negative review in the comments section of the product page: ....Although V-log provides more dynamic range, it causes so much noise that you have to crush the shadows in post resulting in a loss of dynamic range, so really there is no gain there. the only way to fix the noise is by overexposing your footage, but this just results in some very bad banding and macroblocking issues due to the highlight compression done in camera. These issues could've been resolved by matching V-log to the highlight and shadow values of the camera's color space which is 0-255 or 8-bit but instead, since Panasonic wanted the profile to match VariCam, they threw away highlight and shadow information resulting in only a 30-190 or 7.32-bit color space. So every time you shoot V-log you're only getting 7.32-bits instead of 8-bits and most likely lots of noise, macroblocking, and banding..... I still have a lot to learn with regards to Log recording methods and am curious if what this reviewer is saying holds any truth? From my experiences with VlogL so far, it seems like it's stretching what the GH5 sensor can do. Anyone know more about this? Adorama link: https://www.adorama.com/r/ipcvl-reviews Link to comment Share on other sites More sharing options...
Daniel Klockenkemper Posted October 23, 2018 Share Posted October 23, 2018 Panasonic uses the same activation codes for the GH5 as for the GH4. The review you've quoted is true for the GH4, which could only record 8-bit internally, as well as for the 8-bit recording modes of the GH5. If you choose a 10-bit recording format on the GH5, V-Log-L will use the range from 128-768 out of a possible 1024. So while it's still not the full 10-bit range, there are 640 possible code values in 10-bit V-Log-L compared to the 160 code values in 8-bit V-Log-L (or compared to the 256 total possible values in any 8-bit recording format). This is a significant improvement for color grading, and will reduce the types of artifacts that the review you quoted describes. Link to comment Share on other sites More sharing options...
Ryan Constantino Posted October 26, 2018 Author Share Posted October 26, 2018 That's interesting, thank you for your response, so then do you know if there is any difference between 10bit vlogl and 10bit Cinelike D for example? Link to comment Share on other sites More sharing options...
Premium Member Tyler Purcell Posted October 26, 2018 Premium Member Share Posted October 26, 2018 I've used the GH5 on 10 bit 4:2:2 mode quite a bit and the microblocking is insane even on 1080p. I have no idea how anyone uses these cameras to create a decent image. Coming off a Blackmagic Pocket cinema camera which has zero microblocking ever, the GH5 seems like a toy codec wise. Everyone I know who gets a decent image from one, is using an external recorder. Link to comment Share on other sites More sharing options...
Ryan Constantino Posted October 26, 2018 Author Share Posted October 26, 2018 Interesting, yes that's exactly why I'm using it with a Ninja V. I wanted to go direct to prores. I'm hoping this combination along with 10bit vlogl will get me a good image. Link to comment Share on other sites More sharing options...
Christopher Santucci Posted November 2, 2018 Share Posted November 2, 2018 Cine D is far cleaner than vlog in that camera. Link to comment Share on other sites More sharing options...
Chris Burke Posted November 6, 2018 Share Posted November 6, 2018 I've used the GH5 on 10 bit 4:2:2 mode quite a bit and the microblocking is insane even on 1080p. I have no idea how anyone uses these cameras to create a decent image. Coming off a Blackmagic Pocket cinema camera which has zero microblocking ever, the GH5 seems like a toy codec wise. Everyone I know who gets a decent image from one, is using an external recorder. Is this mitigated with the GH5s? So if an external recorder is used, there is no problem or less of one? Considering this camera for micro budget doc. Might have to look elsewhere. Link to comment Share on other sites More sharing options...
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