Jump to content

Blackmagic Pocket Cinema Camera 4K


Yurolov
 Share

Recommended Posts

3 minutes ago, webrunner5 said:

Yeah but I wonder if this PK4 is going to have all that distortion, vignetting stuff under control electronically like the big boys do?

Well, the distortion and vignetting is on the edge of the frame, but if you cropping the edge of the frame out anyway, and using only the middle of the sense, it doesn't matter if you have vignetting. the 8mm fisheye was made for APS-C cameras, so there won't be any vignetting on an MFT camera anyway :) I would test when the camera arrives, but I sold the lens a while ago.

Link to comment
Share on other sites

9 minutes ago, Anaconda_ said:

Well, the distortion and vignetting is on the edge of the frame, but if you cropping the edge of the frame out anyway, and using only the middle of the sense, it doesn't matter if you have vignetting. the 8mm fisheye was made for APS-C cameras, so there won't be any vignetting on an MFT camera anyway :) I would test when the camera arrives, but I sold the lens a while ago.

Yeah that makes sense. Boy a lot of questions and very few concrete answers on this thing. He said she said thingy. I sure hope this thing is not a Turd LoL. This thing is going to be one of those, I told you so, or Holly Crap it is great! ?

I think it will end up being both to different peoples expectations. This isn't going to be a camera you give your Mom for Christmas!

What.gif

Link to comment
Share on other sites

1 hour ago, Anaconda_ said:

I really hope the answer refers to shooting 120fps.

I was under the impression normal 1080p (up to 60p) was no sensor crop, so 1.9x 'relative to Full Frame 35mm'

1385347165_ScreenShot2018-08-22at07_11_56.thumb.png.cc8ad6a23e26523909f04dba34c77103.png

Look at the question though. They're talking about raw HD. All 4k Blackmagic cameras that I've used crop from the sensor when using a lower resolution in raw (since they don't downsample in raw), and downsample instead (meaning no crop) in Prores. Grant Petty said HD was downsampled in one interview.

Link to comment
Share on other sites

4 hours ago, IronFilm said:

Raw HD must by definition be cropped. 

This is true for all cameras. 

(unless it is a native HD sensor)

FS700 Raw output does not have a crop when shooting 2K @240fps despite it having a 4K sensor. Although it is known that Sony does a small amount of processing on its RAW out. 

 

Link to comment
Share on other sites

29 minutes ago, Tone1k said:

FS700 Raw output does not have a crop when shooting 2K @240fps despite it having a 4K sensor. Although it is known that Sony does a small amount of processing on its RAW out. 

 

I guess I should have been more comprehensive in my response:
Cropping/skipping. (in a way... skipping is still "cropping"! Just spread out across the whole sensor what you are cropping out)

Link to comment
Share on other sites

48 minutes ago, kye said:

Column / line skipping perhaps?

If so, the moire should confirm it pretty easily..

Yes, there is a little moire in certain situations when shooting 2K@240fps.

For the most part it's not an issue and with 4k up to 120p, I rarely use the 2K feature but personally I prefer Sony's implementation to a 4x crop. 

Link to comment
Share on other sites

5 hours ago, Tone1k said:

Yes, there is a little moire in certain situations when shooting 2K@240fps.

For the most part it's not an issue and with 4k up to 120p, I rarely use the 2K feature but personally I prefer Sony's implementation to a 4x crop. 

I prefer the crop. Line skipping introduces a ton of issues and drops the overall quality. With cropping all you have to do is simply use a wider lens. Plus for some reason Sony's implementation of it tends to exaggerate the moire, but I guess you could argue that's more of a OLPF issue... 

Link to comment
Share on other sites

3 hours ago, Joek said:

I prefer the crop. Line skipping introduces a ton of issues and drops the overall quality. With cropping all you have to do is simply use a wider lens. Plus for some reason Sony's implementation of it tends to exaggerate the moire, but I guess you could argue that's more of a OLPF issue... 

In use, it's really not an issue 95% of the time and saves having to switch to stupidly wide lenses. 

Link to comment
Share on other sites

44 minutes ago, Savannah Miller said:

5DIII uses pixel-binning.  That generally does not artifact like line skipping does.

True. Though I find the image quality still isn't as sharp as it could be when using it in 3x crop mode. But binning does theoretically average out a lot of the noise, so in a way I suppose the image is cleaner. 

Link to comment
Share on other sites

11 hours ago, webrunner5 said:

It has a 5" screen and does ProRes, Raw internal. What would a recorder bring? Now yeah a high nit one would be nice.

Basically @photographer-at-large wants a BMD VA with a brighter screen. 

 

5 hours ago, Joek said:

I prefer the crop. Line skipping introduces a ton of issues and drops the overall quality. With cropping all you have to do is simply use a wider lens. Plus for some reason Sony's implementation of it tends to exaggerate the moire, but I guess you could argue that's more of a OLPF issue... 


In an ideal world you would be able to pick from either option:


Line skipping when you want to not bother about needing to change lenses .

And cropping for when you think moire might be an issue in that particular scene. 

Link to comment
Share on other sites

1 minute ago, IronFilm said:

Basically @photographer-at-large wants a BMD VA with a brighter screen. 

 

Yeah but how bright is the screen going to be on the PK4? I find 4K VA too much money now for what you get, and 7" to boot. You know it will be even more if it has a better screen. And the 5" one at only 1080p ain't making it in this day and age, and it is pretty expensive also.

Link to comment
Share on other sites

3 hours ago, Savannah Miller said:

5DIII uses pixel-binning.  That generally does not artifact like line skipping does.

Pixel binning isn't really raw now is it. As that is processing being done. 

1 minute ago, webrunner5 said:

Yeah but how bright is the screen going to be on the PK4? I find 4K VA too much money now for what you get, and 7" to boot. You know it will be even more if it has a better screen. And the 5" one at only 1080p ain't making it in this day and age, and it is pretty expensive also.

How quickly we get greedy and lose wider context!

With all the tools the BMD VA, even without the recorder built in, the BMD VA is still a pretty sharply priced screen!

And with the built in recorder that just makes it even more of a killer deal. 

Before the BMD VA came out then even 1080 recorders still were fairly pricey. So when you look back, the BMD VA looks like even more of a killer deal. 

And even 1080 still is handy for a number of folks, for instance:
1) various 1080 camera owners: C100 / F3 / etc
2) for on set playback to check shots, you can use this in the video village to get playback on the spot without needing to get the camera crew to do it for you
3) for on set proxies to be made immediately for later use after wrap

Link to comment
Share on other sites

  • Yeah but for 200 bucks more you can buy the Atomos Ninja V and it does 4K 60P and BT2020, and it is 1000 nits. Seems like a better long term deal to me. Sure no SDI port but how many people Need that and they are adapters to do that workaround.

         Hey all this stuff is changing fast as hell. Sure some of the older stuff works with the older stuff. But you are behind the curve as soon as you buy that stuff. Then in a year or two you can't give it away.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...