3D Frequently Asked Questions Compiled from the 3-D mailing list 3D Frequently Asked Questions This document was compiled from postings on the 3D electronic mail group by: Joel Alpers For additions and corrections, please contact me at: [email protected] This is Revision 1.1, January 5, 1995 The information in this document is provided free of charge. You may freely distribute this document to anyone you desire provided that it is passed on unaltered with this notice intact, and that it be provided free of charge. You may charge a reasonable fee for duplication and postage. This information is deemed accurate but is not guaranteed. 2 Table Of Contents 1 Introduction . 7 1.1 The 3D mailing list . 7 1.2 3D Basics . 7 2 Useful References . 7 3 3D Time Line . 8 4 Suppliers . 9 5 Processing / Mounting . 9 6 3D film formats . 9 7 Viewing Stereo Pairs . 11 7.1 Free Viewing - viewing stereo pairs without special equipment . 11 7.1.1 Parallel viewing . 11 7.1.2 Cross-eyed viewing . 11 7.1.3 Sample 3D images . 11 7.2 Viewing using 3D viewers . 11 7.2.1 Print viewers - no longer manufactured, available used . 11 7.2.2 Print viewers - currently manufactured . 12 7.2.3 Slide viewers - no longer manufactured, available used . 12 7.2.4 Slide viewers - currently manufactured . 12 8 Stereo Cameras . 13 8.1 Currently Manufactured . 13 8.2 Available used . 13 8.3 Custom Cameras . 13 8.4 Other Techniques . 19 8.4.1 Twin Camera . 19 8.4.2 Slide Bar . 19 8.4.3 Beam Splitters . 19 9 Anaglyphs . 20 10 Lenticular Photography . 21 11 Slide Mounting / The Stereo Window . 21 12 Projection . 21 13 Close-up Photography . 21 13.1 Macro 3D Basics . 21 13.2 Base Separation for twin-camera macro photography . 22 13.3 Convergence / Keystoning . 22 14 Photomicrography . 23 15 Aerial Photography . 24 Table of Contents 3 3D Frequently Asked Questions 16 Astrophotography . 24 16.1 The Moon . 24 16.2 Astronomy 3D Articles . 25 16.3 Other Astrophotography topics . 25 17 HyperStereo . 25 18 Shutter / Flash Synchronization . 25 19 Special Effects . 26 19.1 Time Exposures . 26 19.2 Stop Action Photography using an audio flash trigger . 26 19.2.1 Sound Trigger II . 27 19.2.2 Simple Sound Trigger . 29 19.2.3 Other audio strobe possibilities . 30 20 3D Video . 30 20.1 Alternate-frame VIdeo . 30 20.2 Anaglyph Video . 30 20.3 The Pulfrich Effect . 30 20.4 IMAX 3D . 31 21 Stereo Clubs / Associations / Periodicals . 32 Appendix A: Film Image Format . 33 A.1 Standard 35mm film dimensions . 33 A.2 View-Master . 33 A.3 Nimslo / Nishika (4 lenses) - 4 sprocket (24 x 18) . 33 A.4 Image Tech 3d Magic and 3d Wizard (3 lenses) - 4 sprocket (28 x 18) . 34 A.5 Image Tech Professional (5 lenses) - ??? . 34 A.6 Realist - 5 sprocket (24 x 23) . 34 A.7 European - 7 sprocket (24 x 30) . 34 1 A.8 Half-Frame - side-by-side on 8 sprocket ( /2 of 24 x 36) . 35 A.9 Standard 35mm - 8 sprocket (24 x 36) . 35 Appendix B: Information available via anonymous ftp . 36 Appendix C: User’s comments on stereo cameras . 37 Appendix D: Quotable Quotes . 37 Appendix E: Depth of Field Charts . 38 E.1 Interocular Separation for Close-up Photography . 38 E.2 Linhoff Universal Depth of Field Chart . 38 Appendix F: Archives of articles in the 3-D mailing list . 39 Appendix G: 3d email list camera measurements . 40 4 Table of Contents Appendix H: Camera Repairs / Maintenance / Modifications . 41 H.1 Kodak Stereo Camera . 41 H.1.1 Procedure: Removing the top of the camera . ..