It’s all down to the incredible skill of the Magic Lantern dev team that we have this feature. Certainly better than nothing and it is a miracle this works at all. As a result, in the 3.5K mode with working colour live-view image, the refresh rate is slow and it reverts to monochrome when you hit record. These features are hacks, experiments and reverse engineered rather than officially enabled by the manufacturer. The 3.5K works creatively and is great for enthusiasts who want the ultimate image quality and raw for the cheapest price possible from a very advanced Canon sensor, in a small form factor. My Shooter’s Guide goes into detail on this. So I think 10bit 3.5K is definitely the sweet spot here (with a nice 48% raw compression) the crop is a little bit much in 14bit 3K and the data rate is too high in 4K for continuous recording. #Recording 24 fps canon t3i magic lantern fullThe 5D Mark III has a full frame 5.5K sensor of course so depending on the resolution you choose to record at, these modes involve various crop factors over full frame – I find the image to be very nice indeed in 10bit, not a noticeable drop in quality from 14bit. The lossless raw discovery is what makes these resolutions recordable, bringing the data rate under the limitations of the compact flash card slot. 2 seconds recording at 4K (3840 x 1536) 14bit lossless raw (non-working live-view).Continuous recording at 3K (3072 x 1308) 14bit lossless raw (non-working live-view). Continuous recording at 3.5K (3584 x 1320) 10bit lossless raw (working live-view).Here’s a 3.5K frame capture from my shoot – Perfect for APS-C lenses like the Sigma 18-35mm F1.8. The image is truly glorious to behold and is practically a Super 35mm 1.6x crop of the sensor. In 10bit with lossless raw compression the write speed required is 90MB/s for 3.5K raw, bang on the limit for continuous recording to compact flash card at the mammoth resolution of: The final big advantage of this mode is you can get a working live-view image, although the quality and frame rate is a big drop from the standard Canon live-view. What’s more, this 3.5K mode allows the use of lower bit-depths such as 10bit and 12bit rather than the full 14bit of the uncompressed raw modes. Then Magic Lantern discovered a 3.5K mode which DOES record with lossless raw compression, meaning the data rate becomes manageable enough for recording to Compact Flash cards for longer than a few seconds. The 3840 x 1536 mode is part of a previously discovered sensor mode for 3K and 4K recording, but this mode didn’t work in 10bit or 12bit raw and the live view display looked like this: Magic Lantern doesn’t yet unlock the vertical resolution required for 16: x 1536 is a beautiful cinematic result with 2.50:1 aspect ratio similar to cinemascope. In 4K we have 3840 pixels horizontal, which is exactly a 1.5x crop (Super 35mm) of the full frame 22MP sensor. The 4K is more a proof of concept, whereas the 3.5K mode is actually usable for all sorts of filming. More on that in a moment (I was so excited about it, I wrote a book about it). This is a continuous recording mode with a workable low-res, low-fps preview of your scene for accurate framing. It is with the new 3.5K mode that things really start to get excitingĪlas it is with 3.5K not the 4K where the really illicit action is with the 5D Mark III. It’s a veritable amusement park of camera geek features… a forbidden contraband hack that should never have been possible…and here’s how Canon probably feels about you enjoying yourself over it… Look at the RAW video menu above, just look at it. Why did they ignore this technology and refuse to activate it? Then the Sumerian civilisation came along and finally put it to good use! Well it turns out Canon have had sensors in their DSLRs since 2012 which have been capable of 4K video… but they just kinda sat on it. With the new Magic Lantern experimental build for the 5D Mark III, we have an amazing 4K and 3.5K 10bit lossless raw mode with Super 35mm continuous recording.ĭid you know that the Mayans invented the wheel, but only used it for a child’s toy and didn’t really see the point? Available now! The new EOSHD 5D Mark III 3.5K RAW Shooter’s Guide
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