How Blackmagic Crops the Already Cropped Sensor Pocket Cinema 4K and 6K G2

Ғылым және технология

Here's what I discovered about the way the Blackmagic Pocket Cinema Camera 4K and 6K G2 handles cropping. I already knew both cameras didn't have a full frame sensor, but what I didn't realize was that they both crop the final image depending on the recording settings.
According to the owners manual, this is known as "Windowing", where only a section of the sensor is recorded, which is different from the way other cameras simply resize the output. So a 6K sensor recording in Blackmagic Raw will only record the center 4K, which basically means your image will appear closer than what the image normally looks like with that lens.
This also means you may need a wider angle lens or move the camera further back.
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Пікірлер: 18

  • @AskJoe
    @AskJoe4 ай бұрын

    There will definitely be a follow up where I will explore the crop with a variety of lenses.

  • @sten123
    @sten123Ай бұрын

    What I don't understand is why it crops at 1080p? Why does it zoom in as it should still display the correct dimensions of the lens but in 1080p. However this only happens in raw. Pro res the crop factor stays the same regardless of what resolution you choose.

  • @AskJoe

    @AskJoe

    Ай бұрын

    Some manufacturers use a sampled version of their sensors to just match any target resolution, so I guess their raw is exactly that, a pure raw, exact dump of the sensor's pixels, so to create 1080, it's the inner 1920x1080 pixels. Their newest full frame and Pyxis cameras don't even offer ProRes, so they always use RAW and always crop.

  • @sonerarslan4686
    @sonerarslan46862 ай бұрын

    Great video! How would you compare the 6K FF and Pro against the 6K G2 in general? I'm considering the 6K G2 over the other two, because the difference of the 6K Pro pretty much only is the built-in ND filter. The 6K FF is full-frame, which can be worth it, but not sure if that's a big leap worth the money. Currently have a rigged out BMPCC 4k (with speedbooster, ext battery, matte box and nd filters, ext monitor etc.) and I am also not sure if it is worth the upgrade to the 6k G2. The 6k G2 has a crazy deal of €1500 and if I sell the BMPCC 4k, it is only €400 extra for me to upgrade.. Thank you!

  • @AskJoe

    @AskJoe

    2 ай бұрын

    I have tons of easy to swap ND filters, so to me, the FF wins over the Pro. So it comes down to FF vs G2. To really take advantage of the full frame, you start with a bigger 3:2 open gate. That means really big files that you will ultimately crop, giving you lots of re-framing creative options. I love the subtle differences from the 4K to the G2, like the better built-in battery, the EF mount, and the better screen so I can just use it freehanded if I want to, so it's definitely a great upgrade over the 4K, especially if you only need to spend a little more for it. I always render out 4K, but that extra resolution really comes in handy for re-framing your shots or you want to tinker with stabilization. If you want to just shoot without your rig, you can even get a battery grip and Electronic ViewFinder. I picked up my 6K G2 used for only $1400. Meanwhile, B & H Photo normally sells the 6K G2 new for $1595, and the 4K for $1295. Meanwhile I ended up buying a Metabones Speedbooster for the 4K and now I basically paid more for the 4K than the 6K G2. If I knew that earlier, I would've just got the 6K G2. I absolutely love them both, but the G2 is my new main camera and it's my favorite.

  • @sonerarslan4686

    @sonerarslan4686

    2 ай бұрын

    @@AskJoe Thanks for your reply! So I already have a BMPCC 4k + speedbooster. And I already use EF lenses. I'm considering an upgrade to 6k G2, because of the 6k resolution and I'm looking for a leap in quality, sharpness, colors, overall "look" and perhaps a more future proof camera. But I am not sure if BMPCC4k to 6K G2 will make that much of a difference and is worth the upgrade. As for other features: because I already have a BMPCC 4k rig with a speedbooster, and ext. monitor, and a v-mount, some of the improvements of the 6k G2 (like better battery life, flippable monitor, EF mount) aren't THAT important. For me, I want to make short narrative films (relatively small crew), documentary stuff and make my clients happy with all kinds of videocontent.

  • @AskJoe

    @AskJoe

    2 ай бұрын

    I completely agree. Since it's a small gap in price, starting with the 6K G2 would've been the best starting point, so now you have to decide whether the boost in resolution is worth the update. If you sell or trade your speedbooster, that gap in cost may shrink, but money aside the key to 6K and above is what resolution you want to render. For a lot of people who do 1080p output with minimal editing the original 1080 Pocket Cinema Camera is still super popular. When you shoot in higher than that, you get the ability to make one camera look like multiple cameras by re-cropping from time to time from the larger original footage. Right now with your 4K, if you deliver in 1080, you can literally crop out up to 75% of a shot and still deliver perfectly sharp 1080. When done right, those cuts will look like they were a second camera. MKBHD does this extensively, and perhaps too often, but it does give you plenty of options in the edit to still deliver full resolution. Another alternative is to pan in the edit instead of cut and the result is still 1080p. However, if you deliver in 4K and shoot in 4K, you lose that option. Whenever you cut to a cropped version, you are losing resolution and image quality. That's where the 6K and above become game changers. So you can crop that 6K footage and deliver beautiful 4K without losing any quality.

  • @91darko
    @91darko3 ай бұрын

    Can you use Micro Studio Camera 4K G2 as a webcam?

  • @AskJoe

    @AskJoe

    3 ай бұрын

    Unfortunately, none of the USB ports on Blackmagic cameras support webcam / UVC modes, but you can tap into the HDMI with an inexpensive USB capture stick. In fact, I did exactly that yesterday with the Pocket Cinema 4K and it looked amazing. I used an Elgato CamLink 4K, but you can use quite a few others that are even cheaper. The funny thing is the HDMI ports are all 1080p, so any capture card will work. I also tried a $10 USB capture stick and although it seemed to work, the Elgato CamLink 4K worked MUCH better. It was still 1080, but the capture was at a much better frame rate.

  • @91darko

    @91darko

    3 ай бұрын

    @@AskJoe Thank you for answering. I was thinking the same thing. But you can't stream at 4k 30 fps with Elgato?

  • @AskJoe

    @AskJoe

    3 ай бұрын

    @@91darko The Elgato CamLink 4K definitely works up to 4K 30, but the trouble is Blackmagic's HDMI is only 1080p, which was a real surprise to me. From what I see in their camera specs, they only push out 4K or more using SDI.

  • @91darko

    @91darko

    3 ай бұрын

    @@AskJoe Well that sucks... So you need one of their SDI to HDMI converters and then the Elgato camlink. That's too much of a mess.

  • @AskJoe

    @AskJoe

    3 ай бұрын

    @@91darko That pretty much sums it up. They don't seem to be targeting the webcam market, and since even their newest cameras still only use 1080p for HDMI, they definitely won't be pushing out a 4K ATEM Mini any time soon. If nothing else, I'm hoping they have the ability to do it with a firmware update at some point, but I'm not optimistic. For what it's worth, the Elgato CamLink 4K does a great job of turning just about any camera into a webcam. I've used it with my Canon 90D, a Lumix G85, and both Blackmagic Pocket Cinema Cameras and when I do a Zoom, I look like a rock star compared to everyone else in the Zoom.

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