Crop factor X5 VS Full Frame
- Thread starter airdrone
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I think its more like 2.4, so your stock 15mm becomes like 34mm-35mm which for me is way too zoomed it for general video-good for pictures though-, I much prefer something around 24mm for aerial video, I have the olympus 12mm which is much nicer for video, as although its 12mm, that equates to about 7-8mm wider FOV (over the stock 15mm) when filming and it makes a big diff. The olympus 12mm ends up about 28mm I think.
I just want the camera firmware to be stable and the weather to change. We're very much beta tester atm I'm afraid. Still, its fun to be a part of in some ways!
I just want the camera firmware to be stable and the weather to change. We're very much beta tester atm I'm afraid. Still, its fun to be a part of in some ways!
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Olympus 25mm installed on X5 is more similar to what the eye sees. Is not that right?
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Or what lens do I need in X5 two get the same angle as on my sony a7 r2 where I film in super 35mm with 35mm lens. Have forstådt it so That filming with sony a7 r2 with 35mm lens will be equivalent to a 50mm full frame. it will say That on my X5 I need When a 25mm lens. Is that correct?
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As said, depends on the resolution you shoot in.
DJI Zenmuse X5 and X5R: 4K Micro Four Thirds cameras for Inspire 1 drone with D-Log and RAW recording
DJI Zenmuse X5 and X5R: 4K Micro Four Thirds cameras for Inspire 1 drone with D-Log and RAW recording
This image illustrates the crop modes of the Panasonic GH4, which uses a very similar 16MP MFT sensor:
The sensor areas:
The follow-up question: "But for 1080 video, they sample more pixels and combine them; why wouldn't they do the same for 4K?" The answer: for 1080 video, each pixel in the image is produced by combining 2.4 pixels by 2.4 pixels. In other words, each pixel in the final image is derived from about 6 photosites on the sensor. But in 4K mode, there just aren't enough pixels to do this; it could only use 1.2 x 1.2 pixels. There isn't enough data to benefit from combining, so they don't, and the resulting image is superior.
The natural next question: "Why don't they use a sensor that has twice the number of pixels as 4K video requires, and oversample those pixels to combine them into a 4K video image?" The answer; that's a 36 megapixel sensor, which would be much much much more expensive, and would require much much much faster hardware to decode. So wait about 5 years, and that's what we'll all be flying.
The sensor areas:
- Black (4608 x 3486) is the full 16MP sensor, used only for photos. This is a 2.0x crop.
- Magenta (4608 x 2592) is the full width of the sensor, but the top and bottom bands are not used, in order to get the 16x9 HD image ratio. This is used for 1920 x 1080 (HD) video. This is a 2.0x crop.
- Blue (4096 x 2160, or 3840 x 2160) is the part of the sensor used for 4K video. The crop mode is either 2.2x crop or 2.3x crop.
The follow-up question: "But for 1080 video, they sample more pixels and combine them; why wouldn't they do the same for 4K?" The answer: for 1080 video, each pixel in the image is produced by combining 2.4 pixels by 2.4 pixels. In other words, each pixel in the final image is derived from about 6 photosites on the sensor. But in 4K mode, there just aren't enough pixels to do this; it could only use 1.2 x 1.2 pixels. There isn't enough data to benefit from combining, so they don't, and the resulting image is superior.
The natural next question: "Why don't they use a sensor that has twice the number of pixels as 4K video requires, and oversample those pixels to combine them into a 4K video image?" The answer; that's a 36 megapixel sensor, which would be much much much more expensive, and would require much much much faster hardware to decode. So wait about 5 years, and that's what we'll all be flying.
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