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Interesting stuff: 3D Rig
  • Vitaliy_KiselevVitaliy_Kiselev
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    Price: $1500

    http://cgi.ebay.com/3D-RIG-3D-CAMERA-DIY-3D-RIG-KIT-3DEYES-/220813751224?pt=Camcorders_Professional_Video_Cameras&hash=item33698673b8
  • 25 Replies sorted by
  • crunchycrunchy
    Thanks! I have seen it before. Not bad at all when taking into account prices for similar (larger) rigs. However, you can make even better rig which costs less (let's say about 400$ or even less) by yourself. OK. I've spent much more money till now, since I had made several rigs before I was really satisfied with stability of the latest rig, with accuracy of 3D (very important!!) and the speed of changing distances & loading/unloading cameras. 3D was never so good... Oh gosh, I should start producing rigs instead of making 3D videos... :-)
  • B3GuyB3Guy
    I'm building on of these from scratch at my internship right now. Fun stuff! (I may as well ask this here, as NOBODY on C5D Forum even answered my question at all . . . does anyone know of a dual-input monitor with either onionskin capability, or the ability to switch instantly from one input to another? For adjusting 3D Rigs?)
  • Vitaliy_KiselevVitaliy_Kiselev
    @B3Guy
    May be cheaper to get HDMI switcher? I see bunch of cheap and portable switchers on ebay.
  • Vitaliy_KiselevVitaliy_Kiselev
    Something like it
    http://cgi.ebay.com/Super-Premium-slim-mini-2x1-HDMI-Switch-V1-3b-1080P-PS3-/170561355954?pt=LH_DefaultDomain_15&hash=item27b63fc0b2
  • alcomposeralcomposer
    @VK... please don't get me excited about another 3D Solution- now I am going to HAVE to get those digital focus motors (Ever since James pulled focus in 3D- thats where it is at!)...

    Other than that- its a great use of (guessing) Bosch Extruded Profile! (or Item)... and simple...
  • alcomposeralcomposer
    @B3Guy

    There is a new product similar to the Atomos Ninja- made by Convergent Design, (the Grandfathers of HD Remote Recording) - forget its name: http://www.convergent-design.com/ (its on the main page).

    Allows 2x HD-SDI + HDMI 1.4 output + a large screen where I am assuming that you can look at funky meters... (convergence... etc...)
  • B3GuyB3Guy
    Thanks. We're trying to keep this budget, so the current best option seems to be a couple of USB converter inputs by the Elgato company, into a MacbookPro running a software switcher program with the fader at 50%. Once the rig is successfully adjusted, specific lengths for the rails will be finalized, and everything will be sent off to get anodized. Once the rig gets an initial setup using the computer, it should just be a matter of adjusting the camera separation for each shot. (I personally don't like to muck around with toe-in. Just confuses things.)
  • crunchycrunchy
    @alcomposer
    "Other than that- its a great use of (guessing) Bosch Extruded Profile! (or Item)... and simple... "

    Are you talking about the first post? As far as I can judge (some time ago I was trying to figure it out), they are not using Bosch profiles, but other ones (can't remember if they are from China or S. Korea). However, I might be wrong.
    My rig is made from Bosch profiles.
  • crunchycrunchy
    @B3uy: "(I personally don't like to muck around with toe-in. Just confuses things.)"

    Not only confuses, but you would need a software capable of correcting keystone distortions for video (if possible, automatically). Without such correction you will never be able to adjust the picture (perfectly).
  • B3GuyB3Guy
    Well, I'm using Cineform's Remaster and their First Light, which does exactly that. I gotta say, it makes working with 3D footage much easier (it connects both clips within the CineForm codec, which also stores any applied corrections or effects along with the raw clip.)
  • crunchycrunchy
    @B3uy, just interested in your workflow. Can you send (post somewhere) a short left and right original clips and your final clips after adjusting them? The original clips should be toed-in.
    How much time do you usually need to adjust one pair of clips?
  • dkitsovdkitsov
    Idiotic question I think but there goes,: if I mount two GH2 on this rig can I mount them so there is no left-right difference in alignment?
  • crunchycrunchy
    Yes, it is usually used for HDR photography (movie).
  • dkitsovdkitsov
    That would be my intention...
  • B3GuyB3Guy
    that is correct. so what you are pointing out is use it in perfect alignment with an ND or something on one camera, specifically to capture those oh-so-blown-out highlights? That sounds useful! But how would one meld the clips in such a way as to preserve "best of both worlds"?
  • dkitsovdkitsov
    After effects>timewarp on highlight to match the time quantinization frames of base exposure>output as tiff> run through tone mapping app>exr to aftereffects?
  • B3GuyB3Guy
    An interesting thing about all mirror rigs I've seen for sale . . . all of them have the mirror going full corner-to-corner, when in reality it doesn't need to go all the way into the top corner, as the lenses are so close to the mirror at this point.
  • NickBenNickBen
    Anybody see any new "reasonably priced" 3D Beam Splitter rigs?

    Redrock has a cheap side-by-side solution, but won't work for my app. I'd need beam slitter.

    Genus hurricane 3D at $8000 new and over $6500 used is a little much for me...
  • David_ColeDavid_Cole
    The AquaVideo rig is a good deal and a solid piece of hardware.... http://www.aquavideo.com/press/AquaVideoAero3DPressrelease.pdf

    Full disclosure - Mike Hastings is a friend and I was tangentially involved in the design of this rig. I am NOT financially involved in any way, however.
  • NickBenNickBen
    @David_Cole Price seems reasonable. Did you use another rig as benchmark?

    I saw these for example online...

    3DFilmfactory

    3D Bullet Rig Handheld = $5,895
    http://www.3dfilmfactory.com/index.p...d=71&Itemid=76

    3D-BS INDIE RIG (beam-splitter), 25lbs = $3895


    Aquavideo

    Aero3D List Price $5895. NAB introductory price: $ 3995
    http://www.aquavideo.com/press/AquaV...essrelease.pdf

    The least expensive is Aero3D handheld rig at $3995 so far, if solid build quality...
  • madrendermanmadrenderman
    a powerful netbook + stereoscopic player (50$) + stereoscopic multiplexer (few bucks more) + 2 usb video grabber sd (30$ ?)
    you have a powerful 3d monitor in not expansive way. just tested...
    but the real problem is that you cannot sincronize at single line the two gh2 camera, that mean you cannot do camera movment without problems in stereosinch
  • David_ColeDavid_Cole
    There most certainly IS a way to align the initial sync of the two cameras. There are a number of stereo guys out there doing just that. I've exhaustively tested GH1s and 2's with MANUAL lenses using a power-up sync technique (essentially turning each camera on at exactly the same time from the same power source) and found consistently less than .02 ms of offset at the beginning of each test run and seldom more than .1 ms after 5 min. My cameras are very close in serial number - which may help when it comes to drift over time. Your mileage may vary. Details can be found in the 3D section here.
  • madrendermanmadrenderman
    Hi david,
    i'm stereographer, it's my work.. small delay is not enought. you need a pixel synch, you can cause a big headace to your viewer if you show a 3d pan over 1 meter screen size.
    i tested many tools to synch cameras without genlock, based on powerupsynch, on signal flash synch and more... but they work only on small 3d monitor preview, when you show also with a simple videoprojector, like mine, on a 2,5 meters screen... you canno t see more than 20, 30 seconds before to see some problems. after a minutes you have headace... after three minutes you have eyes strain... and more... stereoscopic shooting is not a simple tool buying, is a complex work, that involve phisiologic studies, perception studies and more..
  • David_ColeDavid_Cole
    Umm.... I'm CEO of Next3D. We make live stereoscopic differential encoders for Turner Sports, among others. Differential encoders rely on high-coherence between the left and right eyes. We understand sync.

    We've encoded plenty of content from LANC or power-up-sync rigs that have less phase error than tri-level sync-based rigs (REDONE being a worst offender). There is no question that rigs that do not have jam-sync will drift over time. Lucky, you can monitor the v-blank from the GH1 (just like the packet timing with a LANC-based rig) and determine when it is time to reset. .1ms after 5 min is VERY good, however, and will not result in any significant phase error. One truth that must be shared is that some cameras may not pair as well - as their oscillators may drift more rapidly. Unfortunately , there is no way to really tell except to gen-up a rig and try it with a sync tester (such as Peter Wimmer's excellent CRT-based tester software). Generally, you try to buy consecutive serial numbered cameras to minimize the risk.

    I do agree that photo-strobe or clap-based sync methods are bunk. As much as a 1/2 frame of error can occur - which is a recipe for a headache, especially if there is motion parallel to the sensor.

    One of the tremendous upsides to the Gh2 is the hack - especially the low-GOP work. As the H264 encoders in the cameras are (obviously) not aware of each other, they make independent decisions about motion coding. This can result in severe occlusion disparity with lots of parallel-to-the-sensor movement (especially when the object in motion is in negative parallax). With the low-GOP hacks, the latitude each camera has to make independent decisions is gated. This improves apparent motion in the encoded stereo material tremendously.

    Take a look for yourself at this sample from my GH2 rig:
    I don't think you'll see any phase lag.

    Regards.
  • zcreamzcream

    Any simple mechanical rig for side-by-side shooting ? It just needs to be calibrated so y and z axes are constant. Just the x-axis needs to be adjustable. No sense in spending so much on side-by-side rigs.

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