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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

2K disadvantages ?

M

Marcos Luger Diaz

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Hi There, my first post but long time reader.

in a few weeks I will be having my second RED shot, probably will pull some high fps. So, other than the narrower field of view, and the smaller resolution, is there any downside on the image quality ? It won't hit the big screen, it's just a music video. As for lenses, the rental will provide me the RED's 18-50 and 50-150. For example, reading the Scarlet forum, I have understood that when using 35mm glass on the 2/3 sensor, you not only get the crop factor, but that "portion" of the lens won't be that good for an 3k image. Does something similar happens when shooting RED One at 2k ?

thanks in advance !


marcos
 
When shooting in 2K you get a center punch of the sensor. In essence you will double the focal length on your lenses. so your 18-50 now becomes a 36-100 and the 50-150 goes to a 100-300. That would be the only down side if you needed the wider 18mm focal length. Other than that I love shooting in 2K. Been doing it for over a year and counting .....
 
It depends what your finishing resolution is.

You will find that there is more noise in the image in 2K than in the other modes if you finish to 1080p. If your MV is going to be finished in SD, then you're fine.

Assuming you're finishing 1080, then if you don't mind a little noise and you're shooting all of the footage 2K (or are prepared to add a little noise to 3K and 4K footage), no worries. If not, you should try to shoot your images with a slightly higher fill level than you usually would for your intended look, and crush the blacks a little in post. Testing wouldn't be a bad idea, either! ;)

Hope that helps,
Dom.
 
Yeah, I don't get that.

I mean I get it, but I don't understand WHY there is more noise just because we are using a smaller portion of the sensor?
Can anyone explain this?


Greg
 
Glossing over lots of maths, physics etc and putting it simply, you're using less of the sensor which equals less photo sites. You capture less photons, the signal-noise ratio gets worse.

Think of your final image as being hungry for light. You just reduced the size of it's dinner plate.
 
Marcos Luger Diaz said:
... probably will pull some high fps. ...
Click to expand...

I have reread your post over and over, and other than the high fps, I see no reason why you should be shooting in 2K.
(maybe I overlooked something)

But, if you are concerned about the noise in the pictures and possibly in the renders - why not shoot 4K (except for the high fps scenes) - especially if you have a Red One and the right lenses to do so ?
I might be wrong, but if you end up not liking the noise in your footage and plan on de-noising it - why not only do that to the high fps scenes instead of all of your footage.

Sorry - wasn't meant as a rant, just something to think about.

Good luck with shooting and please let us see the result!
 
Other than your overcrank stuff. Red is meant to be shot 4k so shoot it as much as possible.
 
I have found that the 2K mode with daylight situations has very little noise and resulted in a much cleaner image than I was even expecting. We were going to finish at 720P after shooting 2K, but now I think we'll do 1080 because it looks so good.

We were also shooting for day for night, protecting all highlights from clipping, so the bulk of our image is underexposed a bit as far as normal skintones, and it all still looks fantastic.

The main reason we chose 2K over 4k/2k for highspeed was to use a lightweight S16 zoom lens. Otherwise, shooting 4K when you can is usually the best practice, as stated above.
 
I think it also depends on the subject filmed.

I've seen highspeed shots of sport (skiing) shot in 2k wich looked ok. But it was intercut with stady landscape shots at 2k wich looked messy. If you need details in your picture like a landscape or an other "looking around picture" I would not recommend to shoot 2k...

Patrick
 
Hi ! thanks for your answers.

sorry, it's a fact I will be shooting high fps, don't know yet the exact speed, so there is a chance to go 3K.

Noise doesn't bother me in this case, will be shooting mostly in day light, the change of the focal length I was aware. The case is, I have the feeling that some how you sacrifice the "magic" of 35mm (both lens and sensor) when going 2K. Anyway I will have to change the format when shooting high fps. The question now is if I should stay at 4K for the rest of the video.


still one month to go, but will post the results as soon as is finish. And once again thanks for the answer, this place is a great source of information.


Marcos
 
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