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  1. [quote name='galenb' timestamp='1354167809' post='22606'] Um... I understand the difference between global and rolling shutter. [/quote] I'll take your word for it. [quote name='galenb' timestamp='1354167809' post='22606'] But I think you are missing my point which is that sensors need to be made to support global shutter as an acquisition method. [/quote] Nonsense. [quote name='galenb' timestamp='1354167809' post='22606'] Maybe you know something that I don't but as far as I knew, the sensor on the
  2. [quote name='Mark Virtue' timestamp='1354136211' post='22571'] HD-SDI passes the genlock, assuming I am reading web pages properly. [/quote] It looks like a pretty good product. It has come down in price, too. The price was around $14,000 less than a year ago. Now its $2k... Practically reasonable...
  3. [quote name='galenb' timestamp='1354133852' post='22565'] Um, Maybe I'm misunderstanding you? It seems like you are suggesting that by attaching a rotary shutter it will somehow enable global shutter on the camera? As far as I know, the sensor has to be made to support global shutter in the first place. And, even if it did, it would need to be switched on in software before it could even be utilized. So we are also talking about hacking the firmware. And, there is a tradeoff with global shutter too. Loss of dynamic range so I would expect that we would loose the 13
  4. [quote name='Mark Virtue' timestamp='1354126713' post='22554'] How about an LCD shutter in front of the lens? I'd run across a web page of a company that builds them and has the sync box for it. The price was not cheap, around 2K USD. EDIT: Found the link [url="http://tessive.com/"]http://tessive.com/[/url] [/quote] Good find. This should do the trick, but they say it needs genlock for sync. And you lose a stop. And it's 2 grand...
  5. Well, nearly every film-based movie camera in existence uses a rotary disc shutter, and many are very quiet. 1440 rpm is what's required for 24fps. DVDs are read at 1530 rpm on the innermost edge, so every portable DVD player is capable of spinning a DVD at 1440 rpm, and most aren't very loud. A non-uniform shutter disc spinning at 1440 rpm could introduce a slight 24hz shake. One answer would be to make the disc shutter a uniform clear disc painted black with the desired shutter angle. The entire system could be engineered from standard DVD player parts. A DVD-sized rotary
  6. I loathe the idea of buying a camera whose rolling shutter speed is not significantly faster than the 5D mark ii. The BMCC would be far more appealing to me if it had a global shutter.A rotary disc shutter add-on could do the trick.The sensor is small enough on the BMCC that an appropriate rotary disc shutter needn't be very large.15cm in diameter is probably overkill, but the bigger the better for the purposes of eliminating rolling shutter.It could have a male mFT mount on the camera side and a female canon EF mount on the lens side.The shutter angle should be variable as in the Photoson
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