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180 rule for video

Discussion in 'Photos and Videos' started by Mossie, Apr 7, 2015.

  1. Mossie

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    Can I ask some photo guru about the 180 rule that is often mentioned on this board ?

    If I'm taking 30 fps video in 4 k I should be setting shutter speed at 1/60 correct ? Now if the conditions get darker and I need to decrease the shutter speed to get more light in, should I change to a lower frame rate.

    Also is it better to alter the shutter/iso in full manual or keep it in semi auto ?

    Sorry but these questions might seem absolutely dumb to some people ?
     
  2. Mazz

    Mazz Moderator
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    Someone posted this a while ago and I really liked it. Maybe it can help you out.

     
  3. pops52

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    This is a great video and needs to be re-posted every once in a while. He has others too.
     
  4. Mazz

    Mazz Moderator
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    Great idea. I'll post a sticky for video tutorials.
     
  5. Josh Hanson

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    How is he getting the zebra pattern on the over exposed areas? I can't find the meeting in the android app.
     
  6. Mossie

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    Great video but I would like to see his follow up video after he's had a few months flying the Inspire.
    I tried changing sharpening to -1 and it looks awful. Also I'm just wondering whether it would be beneficial changing 4k fps from 30 to 24
     
  7. skylabimaging

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    The 180 degree rule can be broken for aerial use (well it can for other stuff too but yeah)...perhaps a 90 degree is the best option sometimes.

    Yes the sharpening is awful, -1 is too blurry and anything past zero I find too much...not a lot of wiggle room, just another thing we have to accept. Hopefully they will release a nicer camera for the inspire soon
     
    lrwskyfilms likes this.
  8. Harry Nicholson

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  9. sirnikolas

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    Absolutely!
     
  10. mdomeny

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  11. Eve Haugen

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    This is awesome video!! GREAT!
     
  12. InterMurph

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    I don't think this is correct. But the terms are tricky, so let me rephrase your question with precise info:

    "If it is too dark to shoot with a 1/60 shutter speed at 30 FPS, should I maintain that shutter speed, and decrease my frame rate (to 24 FPS, 15 FPS, or 10 FPS)?

    The answer to that question is "no". You should choose your frame rate; 30 FPS is common, and 24 FPS is considered "cinematic". But you should never go lower than that.

    So you have selected 30 FPS, and the ideal shutter speed is 1/60. If that is too dark, should you slow down the shutter to 1/50 or even 1/30? The answer to that question is usually "yes". Like most rules, the 180-degree rule is more of a suggestion for what works best in most cases. But in dark areas, it's OK to slow the shutter speed. And in bright areas, it's OK to increase the shutter speed.

    But what about when it's really dark? Can you continue to lower the shutter speed to 1/10, 1/5, or 1/4 of a second? The answer to that question is "absolutely not", because then you won't be able to fit 30 frames/second. The slowest shutter speed for 30 FPS is 1/30; you can't go any lower.

    So what do you do? Increase the ISO sensitivity. If you are on auto-ISO, this will be done for you. But if you are in manual, you will have to do it yourself. A doubling of the ISO sensitivity (e.g., from 400 to 800) is equivalent to a halving of the shutter speed (e.g., from 1/60 to 1/30).

    Now what about when it's way too bright? You want 30 FPS, and you want 1/60, so you have to lower the ISO sensitivity. But what happens when you hit the lower limit? You have two choices there: 1) increase the shutter speed (to 1/125, 1/200, etc.) or 2) add a neutral-density filter. If you increase the shutter speed too high, you can get some choppy motion. And right now, the ND filter options for this camera are limited.
     
    jpar247, lrwskyfilms and gruvpix like this.
  13. Mossie

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    Thanks, that's a great reply !
     
  14. The Editor

    The Editor Moderator
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    There are no zebra's in android unfortunately :mad:
     
  15. Mazz

    Mazz Moderator
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    In the apple app is is under the settings and it is labeled "Over Exposure Warning" with a slide switch. Surprised they would not put that in both apps....
     
  16. Sky High Photography

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    AMAZING REPLY!!!
    Even I understand it now;)