Canon DSLRs have always had
pretty soft video, relative to the amount of detail that can be present in a 1080p frame. For example, here’s a test of the
Canon EOS 7D aimed at a 4k test chart, the result looks more like the kind of detail that can be captured by a good 720p camera, not really 1080p, and with annoying moire and aliasing issues. Panasonic’s micro-4/3 format camera, the GH2, especially with one of the higher-bitrate recording hacks installed, looks to record much
higher detail within its 1080p files –unfortunately it has a smaller sensor than APS-C (7D, 60D, T2i, T3i) or full-frame (5Dmkii), otherwise I’d have sprung for one long ago.
I’ve always assumed the relatively soft detail recorded by DSLRs was due to the fact that these still cameras lacked processing power to scale the entire sensor’s imagery fast enough to keep up with a 24 or 30 frames-per-second record rate, and instead cheat their way down to a 1080 frame in a faster manner by binning, line-skipping, or otherwise not using every pixel of each frame. But if that’s the reason, and Canon’s newest DSLR is actually scaling the full ~5k image captured at its sensor down to 1080 in a sensible way, the result should look fabulous. If such cameras could use the entire sensor just as they do when shooting a full-resolution still image, and then scale it down to 1920×1080, the resulting image should rival that of any available 1080p video camera (or at least be close to the look of video captured by Canon’s $16k C300). That’s what I hoped to see, more or less, when video clips from Canon’s new 5D Mark III started hitting the net.
Unfortunately, the examples posted so far underwhelm. It appears that the new DSLR is scaling the frames more sensibly, resulting in eradication of moire and aliasing, but unexpectedly the resulting images don’t appear to contain more detail than frames captured by its predecessor, the 5D Mark II. One possible reason may be that the camera by default applies excessive noise reduction as it records video, especially when recording video at high ISO settings. If that’s the case, maybe we’ll see better examples when people post more low ISO video with noise reduction disabled (if that’s possible).
If the culprit is excessive noise reduction, or other intentional softening of the image, it’s also possible that a bit of sharpening of the resulting imagery may clear away the blurring and bring back lost detail (and noise). One promising test posted to the net by Cinema 5D that compares the 5D Mark III imagery with sharpening to that of the Red Scarlet-X, and Philip Bloom’s “My first 48 hours with the Canon 5DmkIII” post, makes this look like a promising area to explore. There’s also this test. Information is starting to come out. Maybe the detail is there in Canon 5D Mark III footage, waiting to be recovered in post or via an on-camera sharpness setting?
I’ve been hoping Canon’s newest full-frame DSLR would again leapfrog the competition in the video space, demolishing aliasing, moire, and recording a beautifully sharp and maximally detailed image. 2 out of 3 ain’t nothing, but that #3 is pretty important. I and the lenses I used to use daily when shooting 35mm film want an excuse to move up to a full-frame DSLR, but for now I’m just watching and waiting to see how things develop. Better examples may be coming from the 5DmkIII (I’m looking forward to Philip Bloom’s review), and the GH3 and Canon’s promised 4k cinema DSLR are yet to be released. NAB is right around the corner.