The Canon EOS 7D 3K movie experiment

by planetmitch5 Comments

An interesting idea floating on the DVXuser forums – The Canon EOS 7D 3K movie experiment – we were alerted to this by We've seen a couple of GH2 videos done in burst mode that were related to being 4k video (remember they're talking about horizontal resolution – 1080 HD video is really almost 2k because it is 1920 x 1080 – the 1980 being the width). In this situation, the author (Jan Mocnak) used the 8fps from the Canon EOS 7D and then used “for some scenes Twixtor for some Foundry Kronos (reference)” to stretch the video out to 24fps.

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The first post by dc98

know that native 3K movie on HDSLR is hardware mission impossible, BUT …..what happened if you shoot photos at sequence mode (canon 7D can shoot 8 FPS) …at JPEG format at 3k resolution…you get “8fps movie sequence”….hey 8fps ?? eggrrr its realy slow fps…now its time for experiment with inbetween frame calculations…and what happened ???…you can see it in my tests movie seq. in 3K resolution No color grading, no other postproduction… I know this method is not perfect at all and has many limitation, but for some “static” or not fast scenes like nature documents is maybe usable


I wrote to Jan and asked:

I do have a clarifying question tho please Jan… you state that it is a 3k video – but the highest resolution on the Canon EOS 7D for still is 5184 x 3456 – which would be 5.1k (since they measure the horizontal resolution for video right?). Am I right? Or did you do something in post to take it to 3k wide?

He replied:

You Are Right, but at postproduction I downsized it real 3K. But If you shoot at maximal camera resolution you can get 5K image sequence and you can use same workflow to achieve 5K inbetween frames from 8fps 5K jpeg images

Canon 7D 3K movie experiment – Downscaled to 1080p from Jan Mocnak on Vimeo.

Downscaled video from 3K source made with JPEG 8fps sequence and calculated inbetween frames back to 24 fps

So, what do you think? Worth the experiment? Does it add anything to the party?

(cover photo credit: snap from the video)

Zeiss Cinema Lenses


  1. Already knew for time lapse was possible to make 4k by using photos, possibly with Sony able to get better FPS might be easier to get do it though.

  2. Cool but very old news and actually easy with the 7D.

    I invented this technique ( the discussion is still on forum archives in 2004 with motordrive on a Canon Elan 7 and early version of Twixtor (See my short Crisp Yellow Flowers that was shot with Elan on Fuji slide film). I made a whole 5 minute short with Pentax K10d burst mode (2fps) to 24fps + Twixtor (Still Life).

    I’m currently in production on an IMAX film animated from still photographs and major sequences are being shot 7D 8fps burst + Twixtor.

    Several others including a filmmaker in Hong Kong have been using this technique for years from my work at It’s very possible they figured this out on their own but this technique has been around and it’s surprising more people don’t use it.

    1. Well it’s definitely the sort of thing that is obvious to figure out. I figured this out before I read about it here for the first time. I also figured out a couple of other things I will be experimenting with soon since I’m total n00b. If I find anything exciting, I will post back here about it.

  3. Interesting concept. I don’t think the resolution is that much different than if he shot that on video. The sharpness increase could be achieved by using a nice Leica lens and/or some post techniques.

    I’ll be sharing a great post technique that anyone could do in Premiere that increases apparant dynamic range and also sharpens the footage. A pretty cool trick using opacity types and invert filters. Coming soon…

    1. You don’t think the resolution is that much different than if he shot it on video…. because it IS the same resolution as if he’d shot it on video. Vimeo doesn’t show show 3K footage, and even if it did, unless you’ve got a monitor that’s got a resolution at least 3K pixels wide, your monitor’s not going to show it either.

      It’s kinda like watching a Blu-ray on a 1024×768 monitor, it doesn’t look any better than SD (cuz on a 1024×768 monitor, it isn’t!). :)

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