Sony F55 4K OLPF Testing -- Track & Field

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• published: 25 May 2014
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This video is a companion to another video I posted a few weeks ago with footage from a baseball game. In the other video (see link below), I used Sony's optional 2K OLPF (optical low-pass filter) that is designed to suppress high frequency detail that can cause aliasing, moiré, and overly sharp images. The problem of aliasing is often most visible when the “S&Q; Motion”, “High Frame Rate,” and “Full Scan” modes are being used all together. The more contrast and fine detail that are present in the image, the more chance you have of getting an aliasing problem. Does the 2K OLPF work? Yes . . . but is it necessary? The filter costs $800 to buy, and it is a bit of a hassle to change filters when when you want to switch back and forth between 4K shooting and 2K shooting. So, I shot this video to test HFR shooting WITHOUT having the 2K filter installed. All the shots in this video were done using only the regular 4K OLPF that comes with the camera. Unfortunately, it wasn't a sunny day with a lot of contrast, but it still worked well enough for my purposes. I do see some aliasing in a few shots (especially on white lines on the track), but not as much as I was expecting. Link to baseball footage that uses the 2K OLPF: http://vimeo.com/93286428 Camera: PMW-F55 Format: XAVC HD / 23.98 HFR: 180 fps Shutter: 1/500 2K OLPF: No 4K OLPF: Yes Lenses: RED 300mm prime and Zeiss LWZ 15.5-45mm zoom ------ For more information about the Sony PMW-F55 camcorder, please see “Doug Jensen's Guide to the Sony PMW-F55” book. https://itunes.apple.com/us/book/doug-jensens-guide-to-sony/id892493476?ls=1&mt;=11

Sony F55 4K OLPF Testing -- Track & Field

• Report rights infringement
• published: 25 May 2014
• views: 0

This video is a companion to another video I posted a few weeks ago with footage from a baseball game. In the other video (see link below), I used Sony's optional 2K OLPF (optical low-pass filter) that is designed to suppress high frequency detail that can cause aliasing, moiré, and overly sharp images. The problem of aliasing is often most visible when the “S&Q; Motion”, “High Frame Rate,” and “Full Scan” modes are being used all together. The more contrast and fine detail that are present in the image, the more chance you have of getting an aliasing problem. Does the 2K OLPF work? Yes . . . but is it necessary? The filter costs $800 to buy, and it is a bit of a hassle to change filters when when you want to switch back and forth between 4K shooting and 2K shooting. So, I shot this video to test HFR shooting WITHOUT having the 2K filter installed. All the shots in this video were done using only the regular 4K OLPF that comes with the camera. Unfortunately, it wasn't a sunny day with a lot of contrast, but it still worked well enough for my purposes. I do see some aliasing in a few shots (especially on white lines on the track), but not as much as I was expecting. Link to baseball footage that uses the 2K OLPF: http://vimeo.com/93286428 Camera: PMW-F55 Format: XAVC HD / 23.98 HFR: 180 fps Shutter: 1/500 2K OLPF: No 4K OLPF: Yes Lenses: RED 300mm prime and Zeiss LWZ 15.5-45mm zoom ------ For more information about the Sony PMW-F55 camcorder, please see “Doug Jensen's Guide to the Sony PMW-F55” book. https://itunes.apple.com/us/book/doug-jensens-guide-to-sony/id892493476?ls=1&mt;=11