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October 15th, 2005, 09:05 AM | #1 |
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Any HD100U shorts yet
Anyone done a short with the HD100U yet (or long form tests), and if so, is it posted or viewing? If so could you provide the link?
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October 15th, 2005, 10:52 AM | #2 |
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Here's an extended low-light test. There is another thread somewhere all about it.
http://homepage.mac.com/timdashwood/...y-sorenson.mov |
October 15th, 2005, 01:44 PM | #3 | |
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And how did you get the slowmo effect? Thanks Duke |
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October 15th, 2005, 06:10 PM | #4 |
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There really is another thread that answers all of those questions somewhere - I just can't find it right now.
Anyway, here are a few of the specs: -shot between 9PM and Midnight in the rain. (no dropouts by the way.) -Ambient light level was around 2 footcandles - 5 in the hotspots of the street lights. I used a 60W china ball for the CU handheld running shot. -Stock lens with a Promist1 - ƒ1.4. -0dB gain, 1/48th shutter, preset 3200K. -MAX Standard gamma, black level NORMAL, black stretch 3, Knee at 85%, cine matrix (but the edited sequence has been colour corrected.) -All shots were 720P24 except for the slo-mo which was 576P50, conformed in cinema tools to 23.98fps, then uprezzed to 720P (and then the edited sequence was compressed into a small file size for the internet.) The point of this test was to see the absolute limits of the camera in the worst possible available light situation on a rainy night. I have so far learned a great deal from this particular test about how sensitive the HD100 actually can be (contrary to popular belief.) The progressive CCDs themselves may be less sensitive than their interlaced counterparts, but with proper control over camera processing (cranking the gamma and stretching the blacks) I found that it is actually VERY sensitive - even at 0db gain. I was able to show in another test that it was 1.5 stops more sensitive than the DVX100 using my "low-light" scene file, which would make it at least 3 stops more sensitive than the Z1 (based on Barry Green's shootout test http://dvxuser.com/articles/shoot3/ ) Based on what my lightmeter was reading (4-5 footcandle key) the night of the shoot, I would rate this gamma curve between 650-800ASA. There was some intermittent SSE on three of the shots. It can be easily fixed in post by either crushing the blacks or making a slight black adjustment to one side of the other. I have also since found another way to eliminate it from the camera while shooting with this setting and a master black level of -2 or -3, but there would be a slight loss of detail in the blacks. This footage is being made into a teaser trailer for a short film I will be shooting in a few months, so I'll post that when it is done. Tim |
October 15th, 2005, 07:13 PM | #5 |
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Thanks Tim. I am looking for as much info as I can find about this camera going through its paces. Folks if there are additional links please post it. There should be a central locations where links for downloadable footage testing this (and other) cams can be found on this board.
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October 18th, 2005, 11:36 AM | #6 | |
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October 18th, 2005, 11:52 AM | #7 | |
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If your project is SD to begin with, then you lose no res and it's win-win.
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October 18th, 2005, 12:05 PM | #8 | |
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October 18th, 2005, 12:20 PM | #9 |
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It's not really a resolvable "problem." You can't crank video cameras. They either do a framerate or they don't. My suggestion is to shoot the spacial resolution you want, and then use your NLE to stretch it. Some software is *very* good at interpolating motion and creating the tweens.
Human visual perception is much more sensitive to spacial rez than it is to temporal. |
October 18th, 2005, 12:34 PM | #10 | |
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October 18th, 2005, 12:51 PM | #11 | |
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I don't consider this to be a "problem to be solved" in the HD100. JVC is the first to even offer 576P50 or 480P60. You should be glad they threw it in in the first place. I would love a 720P60 capture/record capability to be "turned on" with a firmware update, but if we are still limited to 19.2Mb/sec, then I don't know if the image quality would be worth it. Remember that JVC has optimized the MPEG2 encoder to give data priority to 24 frames within the 19.2Mb/s, so the other 36 pulldown frames are not as high quality. If we were required to "see" every one of the 60 frames, the 19.2Mb bandwidth would need to be evenly distributed to all frames. |
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October 18th, 2005, 12:55 PM | #12 | |
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October 18th, 2005, 01:00 PM | #13 |
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If you've ever seen what Twixtor can do, you'd have little concern about overcranking in camera.
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October 18th, 2005, 01:53 PM | #14 | |
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October 18th, 2005, 01:59 PM | #15 |
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No doubt, but I'd take it over upsampled SD for most normal "dramatic" uses. If you're trying to capture a bullet splitting an apple, that's a different story. ;-)
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