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OTHER CONSIDERATIONS

Toe-in convergence or parallel shooting with post-production H.I.T.

One of the most debated topics among stereographers is whether to "toe-in" the cameras to

converge on your subject or simply mount the cameras perfectly parallel and set convergence in

post-production. Converging while shooting requires more time during production but one would

hope less time in production. However "toeing-in" can also create keystoning and object distorion

issues that need to be repaired later. It is recommended for beginners to always shoot perfectly

parallel and adjust vergence in post production.

Bit-Rate and Resolution

It is recommended to always shoot S3D with the highest bit rate possible. In the XF series this is

50mbps. This will avoid compression artifacts that would be considered a disparity. Resolution

should be 1080 for most shots. It is OK to shoot 720p60 if the intended use is overcrank slow motion.

The temporal resolution advantage will outweigh the pixel resolution. However, timecode will not

be output during overcrank (slow motion) or undercrank (fast motion) recording in 720p mode.

CONCLUSION:

This white paper has only scratched the surface of what is involved in the process of

photographing stereoscopic 3D content. There are a few good books and much information

on the internet detailing advanced techniques for shooting, posting and distributing

stereoscopic 3D.

Remember... stereoscopic 3D cinematography is a craft that can takes years to master and is a

craft where even the 'experts' are still learning new techniques. As the popularity of S3D

continues to rise there will by many demands on inexperienced videographers to provide

stereoscopic services. It is important to remember that 2D can look bad, but 3D can feel bad.

The last thing any producer wants is to physically hurt the audience. Therefore, extensive

practice and testing is advised before producing content to be viewed by anyone other than

the stereographer. Trial and error is the best way to learn this particular craft.

Tim Dashwood is the founder of Dashwood Cinema Solutions, a stereoscopic research, development &

consultancy division of his Toronto-based production company Stereo3D Unlimited. Dashwood is an

accomplished director/cinematographer & stereographer and a member of the Canadian Society of

Cinematographers. His diverse range of credits include music videos, commercials, feature ﬁlms and 3D

productions for Fashion Week, CMT, Discovery Channel and the National Film Board of Canada. He also

consults on and previsualizes ﬁght/stunt action scenes for productions such as Kick-Ass, Scott Pilgrim vs the World

and Paci c Rim. Dashwood is the creator of the award winning Stereo3D Toolbox plugin suite and Stereo3D CAT

calibration and analysis system.

XF300/305 Whitepaper

Tim Dashwood

Stereoscopic 3D