1. Backfocus Demonstration with the Metabones Speedbooster

    02:52

    from Anthony Brown / Added

    842 Plays / / 0 Comments

    We all know the benefits of the Metabones Speedbooster, the increase in light transmission, the recovery of a lens angle of view, Canon EF lens control, declicked aperture on Nikon G lenses and overall increase in MTF but not many mention the back focus adjustment that the adapter gives you. Any Positive Lock lens mount offers the user backfocus adjustment via metal shims, this allows a Prime lens to have accurate marks and gives compatible Zoom lenses a Parfocal function. To have this adjustment available on a humble Pocket camera or indeed a Sony FS7 is highly desirable. This simple demonstration is with 3 popular zoom lenses on my BMCC MFT and includes a budget Tamron 17-50 F2.8, a Sigma 18-35 and a Nikon 80-200 F2.8 Mk2. I have also adapted the lenses with a Kenko 1.4X Tele Extender. I feel the lenses wide open perform very well but this demo is to show each lens retaining focus as it is zoomed out and gaining Parfocal ability, i kept each lens wide open to reduce the depth of field so that any focus shift could be detected. I highly recommend you check out Metabones website for details on Backfocus adjustment.

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    • Back Focus Tutorial

      00:43

      from David Zeitlin / Added

      36 Plays / / 0 Comments

      Video didáctico sobre el back focus para la Universidad de Arcada (Helsinki,Finlandia).

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      • Back focus from hell

        00:09

        from Gethin Coles / Added

        62 Plays / / 0 Comments

        Sigma 24-105. I know its not parfocal, but this has got to be the worst backfocus I've seen in any zoom lens.

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        • How to Adjust Back Focus

          08:13

          from Broadcast Rentals / Added

          In-house video shot by Brad Whipple featuring Earl Sisson with instructions on Adjusting the Back Focus on video camera lens'. Worthwhile information for videographers and assistants. Edited by Earl Sisson.

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          • Black Magic Cinema Camera Infinity Focus Test

            00:33

            from Jay Shaffer / Added

            1,258 Plays / / 1 Comment

            This was a test of the flange distance/back focus issue with a Tokina 11-16mmm F2.8 DX II Lens on the Black Magic Cinema Camera. Please notice the building and lake in the background to see the issue.

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            • Novo Back Focus Tutorial

              04:13

              from Radiant Images / Added

              2,687 Plays / / 0 Comments

              Nick demonstrates how to set the back focus on the Novo camera, allowing you to focus as close as one inch from the lens.

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              • Making of Run On Earth

                01:55

                from Back Focus Producciones / Added

                Aquí tenéis el Making de esa gran App que es Run on Earth; se combina los aparatos de fitness de BHfitness y la tecnología de Apple. Échale un vistazo!

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                • Portrait Documental

                  21:17

                  from Back Focus Producciones / Added

                  Documental dirigido por Fernando López de Castillo y realizado por Back Focus Producciones a través de la Film Office de Vitoria-Gasteiz. Este documental fue originado para Norabide, primer organismo promotor de su realización. Es increíble la de historias que se esconden detrás de los inmigrantes que vienen a Vitoria, si nos acercamos a ellos podremos aprender y enriquecernos de todas sus vivencias... Director de fotografía: Javier Lapeña López de Abechuco.

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                  • Run on Earth_Castellano

                    05:18

                    from Back Focus Producciones / Added

                    Aquí está la nueva App. de i.Concept para entrenar sus pruebas más exigentes sin salir de casa. Vídeo realizado por Back Focus Producciones. Vídeo Industrial.

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                    • New- added some effects to it

                      00:15

                      from Bill Gionis / Added

                      34 Plays / / 0 Comments

                      Let me know if this is ok?

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