hf s11 vs camera HD
Hiya
I have a HF s11. I am not saying that i am not happy with but i am not especially impressed neither. And i admit that in photo mode it can get quiet limited. I was wondering if someone tried to compare the video coming out of still camera (7D or other good camera of course...) shooting HD against it. some video i have seen was quiet impressive and had more shallow dof, probably due to some lenses. And thinking about it this access to a big range of diffrent lenses available for camera seems to be a very interesting point. Any comparisons ? any though ? cheers Olivier |
That shallow depth of field you're referring to is mainly due to
the very large image sensors in those still photo cameras... they are substantially bigger than than the sensor in the HF S series, which is roughly 7mm measured diagonally. Digital SLR cameras that have an HD video mode are equipped with an image sensor that measures anywhere from appx. 28mm (APS-C) to 43mm (Full Frame), so there's your reason for the shallow depth of field they produce. You can tell by browsing our various D-SLR boards that they are indeed very popular cameras for shooting HD video, but your HF S11 has a couple of advantages over them. First, you can record very long clips, filling up your entire card if you want to, while D-SLR cameras are limited to twelve minutes per shot, more or less. Second, your camcorder has a motorized zoom. D-SLR cameras do not. Plus, you have autofocus, which they pretty much have to do without in video mode. Also, your camcorder is more portable and less obtrusive. But there's no real right-or-wrong way to go here. They each have their advantages and disadvantages... it's all a matter of which one is right for you specifically. |
so in theory, the SLR gets a better quality.
5 min shoot is more than enough and the focus changes is so much easy to get with a manual ring anyway... :( thanks |
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DSLRs have been gaining legitimacy recently, as more and more professional productions embrace them as their principal acquisition device. Most recent well known case was the season finale of the American TV show Dr. House, M.D.; the episode was shot entirely on 5D Mark II. |
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In the same way, the 5D2 has the potential to store a full 1920x1080 in its file format, but in reality the level of detail is very poor. On vertical details it's little better than 720p, and for horizontals it's little better than standard definition. Quote:
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resolution doesn't matter ---------------------------------------------------------------------- Agreed! To the thread starter: If the DOF is your concern, try backing up and zooming in. The HV/HF series are capable of getting some pretty shallow DOF using this method. |
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As for big budget movies, that is certainly true. The point of mentioning the 'Dr. House' TV show was, the show is shot and broadcast in HD. It would be extremely difficult to convince producers of the show to approve significant difference in image quality of their usual output (mostly 35mm film), if 5DmkII couldn't produce the image quality and resolution that is close enough to what was before. In all fairness, though, the show broadcasts on Fox at 720p (i.e. not the full 1080i that many others use). 5DmkII should comfortably output enough pixels to populate full 720 raster. |
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As for the lab tests, I think you may have made a mistake somewhere. Did you mix up lpph with lph? The theoretical maximum veritcal lpph for 1080p is 540: that would be exactly one line per pixel. In practice, any camera with that high of a value is aliasing badly, so well-designed cameras tend to have resolution around 70-80% of the theoretical maximum, from 380-540 lpph. 650 lpph is not possible, even in a computer-generated image. The 800 lpph is correct for the XH-A1, but the 5D2 is definitely not 700 lpph. Here is a lab test of the XH-A1: BBC R&D White Paper WHP034 - Alan Roberts It shows a measurement of 470 lpph, 87% of the theoretical max. This is more than the optimum, so that indicates that it will be aliasing, and in indeed it is. Here are the zone plates next to eachother: http://www.dvinfo.net/forum/canon-eo...n-roberts.html The difference in resolution is striking, as well as the difference in aliasing. The XH-A1 has more aliasing than I would prefer, and less resolution than several other 1080p cameras, but the 5D2 is so bad that the XH-A1 blows it away. Even the little old HV10 has far more fine detail: http://www.dvinfo.net/forum/canon-eo...ml#post1132912 Quote:
But again, resolution and aliasing don't matter to everyone. |
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