Inspired by this question.

Are there any cameras / firmware hacks out there that read the sensor multiple times during a long exposure, and show the partial picture on the screen?

Light-painting should be fun with such a camera :)


1 Answer 1


Yes, actually. The Olympus OM-D E-M5 has a "live bulb" feature which does exactly this.

This shows previews at intervals from half a second to a minute during a bulb-mode exposure.

  • \$\begingroup\$ This didn't even occur to me while answering the other question, because it avoids the problems inherent there by only working at a very large-scale timeframe. I'm going to update my answer, though. \$\endgroup\$
    – mattdm
    Feb 2, 2013 at 2:31
  • 1
    \$\begingroup\$ Thanks for the pointer. I found a demo of this feature in action here: youtube.com/watch?v=Rz4g-MFW_t8 \$\endgroup\$
    – cberzan
    Feb 2, 2013 at 2:33
  • \$\begingroup\$ Amazingly, I can't find any mention of it on Olympus America's web site. It's like they don't want you to know how cool they are. \$\endgroup\$
    – mattdm
    Feb 2, 2013 at 2:36
  • \$\begingroup\$ It's kinda strange, isn't it? Most of the people who buy this model have at least some idea of photography (hint, look at all the "I just bought a Nikon D3100/5100. How do I shot this?" questions here) and would have used film a while ago but they think that people who have no idea about photography are buying them! "They don't even know what live bulb is..." \$\endgroup\$
    – BBking
    Feb 2, 2013 at 3:18

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