We have now a very precise videosynch with stereodamaker-cameras(SDM). A cheap videosensor(by gentles/gent-stereo or digi-dat.de is used to calibrate the cams before shooting. Then cams must be on all the time, nothing changed(no replay or other than videosetting). synch takes 30-60 secs. sensor must be shielded against light. synch from 6 down to 1 are all perfect. It can be measured with camerasynch-test using crt-screen. or shooting cars crossing low shadow-lines.

If images are not synch the are apart by even frame numbers. Videosensor-cable should but need not be removed after calibration. I f not removed during shooting -start-sensor must be shielded. I have images on stereoforum how i attached the sensor and how its shielded. One can even start one camera now and second one later if they must be seperated shooting without cable for hyper. videos are not starting at the same time but can be synched precisely afterwards. the are apart by even amount of frames!

I would not use CMOS-cams. When cams are oriented differently (vertical to get smallest base, or one cam flipped on zbar) rolling-shutter will cause hugh problem. We also have now a videozoom-skript for zooming during shooting.

SDM186 is not yet official. I have my first(non zoomed) 3dstereovideo now online here:

• www.3dmusic.ch or my channel
• www.3dmedia.ch

Without Stereodatamaker-guru David Sykes and Werner Bloos(digi-dat.de and german stereoforum.org) and the CHDK-community(SDM based upon CHDK)this all would not be possible.