Blackmagic Forum

Apologies if this has already been covered but I wasn’t seeing it and don’t have access to the camera

What is the RS when shooting in s35 mode on the 6k FF and also I believe it becomes around 1.5x but if someone could confirm that would be great

Thanks so much!

Texaco87 wrote:Apologies if this has already been covered but I wasn’t seeing it and don’t have access to the camera

What is the RS when shooting in s35 mode on the 6k FF and also I believe it becomes around 1.5x but if someone could confirm that would be great

Thanks so much!

I may be wrong, but I believe it is around 12ms. I once used it as an excuse to switch from a Pocket 6k Pro to 6K FF. I can use a lightweight APS-C zoom with Image Stabilization and shoot in s35 crop on the 6kFF and get decent footage when I need it.

Wait Adam, so if it’s 12ms that makes the 6kFF seem like a really great proposition

So what’s the catch haha

Texaco87 wrote:Wait Adam, so if it’s 12ms that makes the 6kFF seem like a really great proposition

So what’s the catch haha

wait, there's a sticky thread that gives readouts:
6kFF/ Pyxis
4K 6:5 36 4832 x 4032 Full Height 25.08ms
4K 4:3 50 4096 x 3072 Super 35 19.10ms
4K 17:9 60 4096 x 2160 Crop 15.13ms

Although it doesn’t seem to be a recording option, 4K 2.4:1 framing for your deliverables would be about 12msec.

Is that faster than the G2/Pro?

Okay Rick here’s a dumb question-

When you say it’s not a recording option are you saying it’s not possible with the 6kFF?

If that’s true that’s rather unfortunate, because that would be a very compelling use case and reason to buy that camera

The only recording 4K options listed for Pyxis;

4096 x 3072 (Super 35 4:3) up to 50 fps
4096 x 2160 (4K DCI 17:9) up to 60 fps

I imagine 4K 2.4:1 guides will be available so you can compose for that and 2.39:1.

I like to see

rick.lang wrote:The only recording 4K options listed for Pyxis;

4096 x 3072 (Super 35 4:3) up to 50 fps
4096 x 2160 (4K DCI 17:9) up to 60 fps

I imagine 4K 2.4:1 guides will be available so you can compose for that and 2.39:1.

S35 on the 6K FF camera is high quality better than the Pocket 6K. I wish there is crop and zoom in options on the 6K FF so you can properly fill the monitor.

I’m about to reinstall our Rawlite filter in to our BMMCC (OG) after cleaning the sensor in hopes that the 2 small white dots I saw in our footage was somehow just dust and not dead pixels.

If they are dead pixels, it will be slightly devastating, and also time for a new camera.

Part of me wants to try to track down a BMMCC with no FPN and no dead pixels but I think I’m well past the “fool me twice shame on me” territory.

The new BMCC6K FF interests me greatly, but I’d be even more interested if the 4k 2.4:1 s35 mode was possible.

The wild card will be a sigma fp, but of course the workflow and purpose built nature of the 6kFF is undeniable

A tale as old as time haha

I did a focal length comparison between the Meike 18mm in s35 mode and an APO Microprime 25mm in full frame and the 25mm looked wider.

I LOVE the APS-C Canon 17-55mm f2.8 IS for its size and weight and feel.
I have no issues shooting with it in s35 mode on the 6kFF with a Viltrox adapter set to "A" mode.

Texaco87 wrote:… The new BMCC6K FF interests me greatly, but I’d be even more interested if the 4k 2.4:1 s35 mode was possible…

Sleep on it, but if that’s a primary concern, consider this:

The cinematic digital version of Widescreen is 4096x1716 with an approximate aspect ratio of 2.3869:1 which is always referred to as 2.39:1. The camera shoots 4K DCI 4096x2160 so you have 222 lines of resolution to reframe the height in post either up or down from the midline. Once you buy-in to reframing, it is a good tool to have as many of our (perhaps hastily shot) clips will look better reframed in the reflective calm of editing your film. You aren’t really wasting 25% more media, it’s just there to take advantage of in the edit.

But if you want to deliver 2.4:1 for personal aesthetics, you just crop an additional 5 lines off the top and bottom on the Timeline or Deliver page of DaVinci Resolve.

I’m shooting 4K DCI on the BMPCC4K to deliver 2K 2.39:1. Now that’s serious oversampling but it’s my choice made with each clip, to reframe the 4K shot to get by best frame or downscale it in post to capture that extra width and improve the detail.

So I’m sold on shooting more area than you ‘need’ and I’m not as smart as David Fincher who knows exactly the right content for every take. If I owned a 6K camera, I’d be shooting 6K regularly to deliver 4K, and leave it up to the ‘editor’ in me to adjust that clip to match to the clips before and after. I find editing the most work in the overall process and edit is the best place to make a good first impression.

Hey Rick,

Thanks so much for the detailed reply!

To be honest, the only reason I’m wanting that particular deliverable is for the significantly reduced RS. In terms of aspect ratios, I have no artistic or aesthetic preference.

The image quality is the thing pulling me towards the FP.

the only reason I’m wanting that particular deliverable is for the significantly reduced RS

But you DO have reduced RS if you frame the 4K DCI for 2.39. The RS per frame is determined by two factors: the total vertical readout speed of the entire sensor, and the image area you decide to fill your frame with. So, if the RS of your DCI 2160 frame is @15ms then the 2.39 portion of that frame has an RS of @11-12ms.

For comparison, an Alexa in anamorphic 4:3 mode has an RS of @9+ms, so your 4K DCI 2.39 spherical frame on a 6K FF is only 2-3ms more than an Alexa anamorphic for the same 2.39 frame.

Texaco87 wrote:…
I’m wanting that particular [2.4:1 capture for my] deliverable is for the significantly reduced RS…

The image quality is the thing pulling me towards the FP.

That’s a good reason depending upon what and how one shoots. I did consider the fp and fp L as well so good luck with that analysis.

Tamas Harangi wrote:But you DO have reduced RS if you frame the 4K DCI for 2.39. The RS per frame is determined by two factors: the total vertical readout speed of the entire sensor, and the image area you decide to fill your frame with. So, if the RS of your DCI 2160 frame is @15ms then the 2.39 portion of that frame has an RS of @11-12ms...

Agree, Tamas. I tried to point that out elsewhere, but you’ve said it more clearly than I did.