mpgxsvcd

Lives in United States USA, NC, United States
Works as a Jack of all Trades
Joined on May 17, 2004

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Total: 2155, showing: 1 – 20
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How does Sony get away with calling 8 BIT footage HDR when true HDR footage needs to be 10 BITs at the very least?

Link | Posted on Apr 10, 2018 at 14:25 UTC as 6th comment | 1 reply

Please, please, please bring this to the United States.

Link | Posted on Mar 27, 2018 at 16:06 UTC as 63rd comment | 1 reply

Canon will keep producing underwhelming cameras until people stop buying them. Please don't buy this camera. There are MUCH better options out there.

Link | Posted on Feb 26, 2018 at 14:33 UTC as 29th comment | 8 replies
On article Canon EOS M50 Review (1296 comments in total)

A 2.56x crop in video makes a system without ultra wide lenses almost useless for video. You can't even use the excellent dual pixel AF in 4K video mode. This camera is just absurd at this price.

If it were $250 it would at least be reasonable as a super budget camera. There are so many better options than this camera.

Link | Posted on Feb 26, 2018 at 14:29 UTC as 254th comment | 3 replies
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: I am having difficulty opening the 14 BIT RAW files from the GH5s. What programs can open them right now?

DNG Converter does support the GH5s now. Thanks for that. That is just what I needed.

Link | Posted on Feb 16, 2018 at 20:31 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)

I am getting some really interesting results with my GH5s. It appears that ISO 160 is the base ISO for CineD Low with ISO 1600 being the base ISO for CineD High.

However, both HLG and Vlog-L are giving different results. HLG and Vlog-L appear to be ISO 320 for Low and then ISO 3200 for high. ISO 1600 is good. However, ISO 3200 is slightly better.

Now this is actually a scientific test. I am recording dark frames at these ISOs. This is a process that has been used for quite some time in astrophotography. This eliminates the possibility of shot noise because the body cap is on the camera which lets zero light in.

Instead this process isolates just the read noise and allows us to see the true gain for each individual ISO value.

Link | Posted on Feb 10, 2018 at 04:08 UTC as 24th comment
On article Panasonic Lumix DC-GH5S Review (589 comments in total)

I am having difficulty opening the 14 BIT RAW files from the GH5s. What programs can open them right now?

Link | Posted on Feb 9, 2018 at 03:57 UTC as 26th comment | 4 replies
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: In the GH5 the HLG mode is reported as "Limited" when you examine the video file on a computer. Also the camera itself even shows that the Luminance Level is limited to values of "64-940".

Is the GH5s different? Does it show full range "Luminance Level" in the camera and when examined with a computer? Your review states that HLG can do a value of 1024 for the brightest highlight for the GH5s. Is that accurate?

I stand corrected. I have evidence that would suggest that in HLG mode ISO 400 is the base ISO for Low and ISO 3200 is the Base ISO for High. Both are simply outstanding but the ISO 3200 is exceptionally intriguing. I simply cannot figure out how they are making ISO 3200 virtually noiseless.

Link | Posted on Feb 8, 2018 at 21:03 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: In the GH5 the HLG mode is reported as "Limited" when you examine the video file on a computer. Also the camera itself even shows that the Luminance Level is limited to values of "64-940".

Is the GH5s different? Does it show full range "Luminance Level" in the camera and when examined with a computer? Your review states that HLG can do a value of 1024 for the brightest highlight for the GH5s. Is that accurate?

Richard, for not being familiar with Resolve you did an unbelievable job with this review. You taught me several things I didn't know about Resolve and also tested a few things in ways I hadn't thought of. Excellent job with this review. Keep up the great work.

I am still testing my GH5s that I got this morning. I can confirm the ISO 160 as a Base ISO. However, my testing did not confirm ISO 800 as a base ISO in CineD with ISO High. It is higher than 800. Probably even higher than ISO 1600.

It is crazy! ISO 1600 on the GH5s is a lot better than ISO 200 on the GH5 with CineD. Simply astonishing.

Link | Posted on Feb 8, 2018 at 19:15 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: Barry Green’s white paper on Vlog-L(From the Panasonic Website) defines the upper limit as exactly 4 stops above middle grey. That is a value of approximately 730. However, you define the upper limit as 768 for 10 BIT Vlog-L. Which one is correct?

https://www.panasonic.com/content/dam/Panasonic/cb/en/Business/AVCCAM/2015/AG-DVX200/VOL.%206%20-%20ENGLISH.pdf

I confirmed what you reported in the review last night. Vlog-L is definitely 128-768 in 10 BIT form with Resolve. I think Barry's White Paper did some rounding to make it sound less complicated than it really is.

Panasonic probably just figured that no one would examine it this closely so they posted it as is on their website. In the end it would only really matter for "correction LUTs".

Link | Posted on Feb 8, 2018 at 15:08 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: In the GH5 the HLG mode is reported as "Limited" when you examine the video file on a computer. Also the camera itself even shows that the Luminance Level is limited to values of "64-940".

Is the GH5s different? Does it show full range "Luminance Level" in the camera and when examined with a computer? Your review states that HLG can do a value of 1024 for the brightest highlight for the GH5s. Is that accurate?

I did some testing with the GH5 last night and HLG is definitely recording in a “Limited” space. However, I believe Davinci Resolve displays it as “Full” data levels if the clip is tagged with either “Auto” or “Video” in the “Clip Attributes” screen. If you choose “Full” for the HLG clip in the “Clip Attributes” screen then it will display the proper clipping points of 64 and 940.

I think Resolve is the issue there. It almost seems like they have it backwards or that they assume you want to see a “Limited” video as “Full” if you select “Video” in the “Clip Attributes” screen. That seems confusing to me but it may be what other people are more comfortable with.

I will confirm that the GH5s works the same way when I get mine in a few minutes. However, based on the data you have provided I am pretty sure it does.

For now I am going to manually set all HLG clips to "Full" in Resolve so that it displays as 64-940 like it actually is.

Link | Posted on Feb 8, 2018 at 14:46 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: In the GH5 the HLG mode is reported as "Limited" when you examine the video file on a computer. Also the camera itself even shows that the Luminance Level is limited to values of "64-940".

Is the GH5s different? Does it show full range "Luminance Level" in the camera and when examined with a computer? Your review states that HLG can do a value of 1024 for the brightest highlight for the GH5s. Is that accurate?

Thanks for checking. My GH5s comes tomorrow so I can look into it more then.

Link | Posted on Feb 8, 2018 at 02:39 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: In the GH5 the HLG mode is reported as "Limited" when you examine the video file on a computer. Also the camera itself even shows that the Luminance Level is limited to values of "64-940".

Is the GH5s different? Does it show full range "Luminance Level" in the camera and when examined with a computer? Your review states that HLG can do a value of 1024 for the brightest highlight for the GH5s. Is that accurate?

No rush. Thanks for checking. Ultimately it isn't that big a deal for how the video looks. However, when designing LUTs for HLG it could make a significant difference.

Link | Posted on Feb 7, 2018 at 16:34 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: Barry Green’s white paper on Vlog-L(From the Panasonic Website) defines the upper limit as exactly 4 stops above middle grey. That is a value of approximately 730. However, you define the upper limit as 768 for 10 BIT Vlog-L. Which one is correct?

https://www.panasonic.com/content/dam/Panasonic/cb/en/Business/AVCCAM/2015/AG-DVX200/VOL.%206%20-%20ENGLISH.pdf

Yes, it is not that big a deal. Ultimately, the camera still captures essentially the same dynamic range. However, it is good to know what is the true value and I am sure Richard can get that answer for us.

Thank you for all of your work on this, Richard. This really was a thorough review. That helps us all tremendously. My GH5s arrives tomorrow. :)

Link | Posted on Feb 7, 2018 at 16:32 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)

Barry Green’s white paper on Vlog-L(From the Panasonic Website) defines the upper limit as exactly 4 stops above middle grey. That is a value of approximately 730. However, you define the upper limit as 768 for 10 BIT Vlog-L. Which one is correct?

https://www.panasonic.com/content/dam/Panasonic/cb/en/Business/AVCCAM/2015/AG-DVX200/VOL.%206%20-%20ENGLISH.pdf

Link | Posted on Feb 6, 2018 at 15:39 UTC as 31st comment | 4 replies
On article Panasonic Lumix DC-GH5S Review (589 comments in total)

In the GH5 the HLG mode is reported as "Limited" when you examine the video file on a computer. Also the camera itself even shows that the Luminance Level is limited to values of "64-940".

Is the GH5s different? Does it show full range "Luminance Level" in the camera and when examined with a computer? Your review states that HLG can do a value of 1024 for the brightest highlight for the GH5s. Is that accurate?

Link | Posted on Feb 6, 2018 at 15:33 UTC as 32nd comment | 10 replies
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: Are you certain that ISO 160 isn't clipping the highlights early in RAW mode? It may have less noise than ISO 400 but the highlight clipping would retard its ability to capture dynamic range.

Panasonic explicitly states that ISO 400 is the base ISO for the GH5s in low ISO mode on their spec sheet for the camera.

There was a lot of interesting information in the GH5s manual. It does appear that ISO 160 and ISO 800 are the "Base" ISO values for the GH5s. Using any other value besides those will limit dynamic range.

Now that doesn't mean you should never use anything but ISO 160 or ISO 800. However, you need to make that decision to give up dynamic range in favor of other advantages.

If the scene you are recording does not exceed the dynamic range that the camera can capture then giving up some dynamic range shouldn't be a big deal.

Not everything you record has an extreme amount of dynamic range. Even scenes where the highlights are clipping may not have that much dynamic range unless there are also some EXTREMELY dark portions as well.

You did an excellent job with this review by the way @Richard Butler. There is a lot of great and very complicated information that you have given us.

Link | Posted on Feb 6, 2018 at 15:05 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)
In reply to:

mpgxsvcd: Are you certain that ISO 160 isn't clipping the highlights early in RAW mode? It may have less noise than ISO 400 but the highlight clipping would retard its ability to capture dynamic range.

Panasonic explicitly states that ISO 400 is the base ISO for the GH5s in low ISO mode on their spec sheet for the camera.

@Richard Butler, thank you for that explanation. It sounds like the GH5s is different than the GH5 in that respect. With the GH5 the "Native" ISO values are also the "Base" ISO values. Anything below the "Native" ISO values on the GH5 was an extended ISO.

That doesn't appear to be the case with the GH5s. It has many real ISO values below the lower "Native" ISO value and then some extended values below that. I suspect those extended ISO values clip the highlights early like on the GH5. Did you check that?

There are going to be an awful lot of people with the GH5s who are exposing properly but using ISO 400 or 800. That will severely limit their dynamic range as opposed to using ISO 160, correct?

Link | Posted on Feb 6, 2018 at 11:53 UTC
On article Panasonic Lumix DC-GH5S Review (589 comments in total)

Are you certain that ISO 160 isn't clipping the highlights early in RAW mode? It may have less noise than ISO 400 but the highlight clipping would retard its ability to capture dynamic range.

Panasonic explicitly states that ISO 400 is the base ISO for the GH5s in low ISO mode on their spec sheet for the camera.

Link | Posted on Feb 6, 2018 at 04:14 UTC as 39th comment | 3 replies

That kind of sounds like a dictatorial government. Doesn't it?

Link | Posted on Jan 17, 2018 at 14:08 UTC as 19th comment | 6 replies
Total: 2155, showing: 1 – 20
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