1. Crop Factor

    03:01

    from Vimeo Video School / Added

    88.2K Plays / / 32 Comments

    Check out the full lesson here- http://vimeo.com/videoschool/lesson/127/crop-factor

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    • Crop Factor Test: Panasonic GH4, GH3, and GH2

      00:42

      from Mahalo Video / Added

      3,195 Plays / / 10 Comments

      This is a simple demonstration of the crop factors for three generations of the Panasonic GH camera: the GH2, GH3, and the new GH4. This comparison shows that there's a larger crop factor for the GH4 in 4K mode than when in 1080 mode. It also shows that the GH4 in 1080 mode has the same crop factor as the GH3. And finally, it's a reminder that the GH2 still has the lowest crop factor of all these sister cameras. I used a Voigtlander 25mm set to f2.8 on each camera. I used the same locked-off tripod position for each (apparently I bumped the tripod in between the GH4 and GH3, resulting in a slight pan to the right). Camera Picture Profile Settings GH4: Cine-D -4, -4, -5, -4, +0 with a Highlights/Shadows anti-S curve in Lumen space 0-255 GH3: Natural 0, -3, 0, -5 GH2: Smooth -2, -2, -2, -2

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      • When a Camera's Crop Factor Makes a Difference

        00:53

        from Alan Stankevitz / Added

        2,927 Plays / / 5 Comments

        Quite often photographer's are misled to believe that a camera's crop sensor increases the "reach" or magnification of an image. This is not so. The camera's sensor density has more to do with the magnification than the crop factor. This is only when photographing a subject. This however is not true for video. The sensor's crop factor does make a difference since most camera manufacturer's average the pixels across the entire sensor. In this video, three cameras are tested. Each with different crop factors. Canon's 5D Mark III has no crop factor, while the Canon 7D has a 1.6x crop factor and the Panasonic Lumix GH3 has a crop factor of 2x. All three cameras were mounted on a Canon 600mm II f/4 lens set at the same distance to a suet bird feeder. (Special thanks to Downy Woodpeckers used as a model.) Besides all three crop factors, the Panasonic GH3 has a built-in teleconverter function that uses the center pixels of the sensor, magnifying the video by another factor of 2x. In this mode, any slight vibration does cause issues since there is no image stabilization available when marrying the Panasonic GH3 to the Canon 600mm lens. In this sample, the wind played havoc with this mode. Resolution however is still increased 2 fold.

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        • DSLR Lens Primer: Part 2

          12:50

          from B&H Photo Video / Added

          2,269 Plays / / 0 Comments

          http://bit.ly/BHCameraLenses The 2nd in a 3 part series about understanding lenses, this video covers focal length, cropped sensors, lens coatings, & filters. DSLR Lens Primer: Part 3 https://vimeo.com/70552999 DSLR Lens Primer: Part 1 https://vimeo.com/69330264

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          • AF100 vs 5DMkII Part 2

            01:06

            from Jeff Murphy / Added

            1,908 Plays / / 9 Comments

            This is the second in a series of side by side comparisons between the Canon 5D MkII and Panasonic AF100. ISO 640 f2.5 on the 5D, and f2 on the AF100. Read more at my blog: http://bit.ly/JeffMurphy_HDSLR_Blog2 We welcome your comments. Our model, the fabulous Jessica Drolet, is lit with a 250w china ball key, small Lite Panels fill and a 150w Arri back light. Distance from subject to candles = approx. 3 feet Distance from subject to background = approx. 7 feet. Thanks to Tom Myrdahl, Jefferson Miller and Jessica Drolet.

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            • GH4 vs GH2 trying Match Profile setting

              01:21

              from Valpopando / Added

              1,379 Plays / / 6 Comments

              I've tried to find a way to match GH4 and GH2 working on colors profile setting . GH2 1080p 24p ( flowmotion 2.02 Hack) Color Profile : Smooth -2-1-2-2 GH4 1080p 24p / 4K 24p color profile : Natural -3-1-5-1-0 pedest : 0 light/shadows 0 both camera iR and iD OFF I still had to color correct a little bit to try and match the colors and even so it is still slightly off, besides on GH2 WB I set to +1 M +1 B for fix geen color cast . GH2 at same aperture and shutter looks brighter , that's why GH2 at 160Iso vs GH4 at 200Iso all shots taken on a tripod same lens ,focal , aperture and shutter , at the same distance from the subject, even to see three different crop factors Just a simply experiment not scientific test

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              • full moon 13/8/2011 athens

                02:13

                from ilias Tsivgoulis / Added

                1,038 Plays / / 5 Comments

                test shot of vivitar 70-210f/3.5 with canon 60d(crop factor) ISO 100,F/5.6,shutter 1/60,real time 200%

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                • Sensor Crop Factor Comparison 5DM3 vs C300

                  07:03

                  from Carlos Quintero / Added

                  316 Plays / / 0 Comments

                  We decided to set up this project so that we could actually see what the focal length crop factor actually looks like on a Full Frame Sensor camera like the Canon 5D Mark III and then compare it to that of a Super 35 Sensor, which has a crop factor of X1.6 like the Canon C300. We feel that this project will help us make better decisions and gear choices when planning our remote shoots. We learned a few lessons from this project specific to Exposure and Post Production which we plan on sharing in future videos.

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                  • LensExplained

                    00:13

                    from Nathan Clark / Added

                    214 Plays / / 0 Comments

                    Attempting to illustrate the relationship between sensor size, focal length & lens format + image circle. NOTE: Really rough work, and not at all to scale!

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                    • BMPCC Lens Crop Test

                      01:46

                      from João Atala / Added

                      Testing here the Cooke MiniS4 lenses mounted on the Black Magic Pocket Cinema Camera, wanted to understand the crop factor for these S35mm lenses on the S16mm sensor. Besides the crop factor, the image quality is superb. The encoding is very lousy since crop factor is the objective of this test. Ungraded. Thanks for watching!

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