PDA

View Full Version : Ideal shutter speed for NSTC GH1



Renren42
08-03-2009, 05:09 PM
Hi,

I know this was probably answered in other threads, but I've searched and can't come up with a definitive answer. I've seen people use both 1/60 and 1/50 shutter speeds for their 1080p 24fps footage. Which one should be used if one is trying to achieve the best filmic look. I would guess 1/50 since it's closest to 1/48, but I'd like to know what you guys think.

As for 720p 60fps, I know you shouldn't go below 1/60, but is 1/60 the ideal setting if one is planning to drop the 720p 60fps footage into a 24fps timeline?

Thanks for the help!

dmoreno
08-03-2009, 07:22 PM
Both your guesses are right:
1080 24 1/50 shutter
720 60p 1/60 shutter if footage is going to be converted to 24p
720 60p 1/120 shutter if slomo in a 24p protect is gonna be used or 60p footage is gonna be preserved that way

Barry_Green
08-03-2009, 09:15 PM
1/50 would be the most filmic shutter, BUT it can cause big problems if you're shooting under magnetic-ballast fluorescent or HMI lighting, or sodium-vapor or mercury-vapor lighting!

I would normally recommend that people stick to 1/60 unless you're shooting strictly under tungsten or strictly with sunlight, or you know for a FACT that you're using high-frequency electronic ballasts.

Martti Ekstrand
08-04-2009, 01:07 AM
Just to be clear here, Barry's advice is correct for people in countries with 60 Hz AC electricity. For the rest of the world with 50 Hz AC (roughly 80%) stick with 1/50 - and 1/100 if going for slo-mo with 720p.

Not trying to be a smart-a**, just that this GH1 section seems to have a lot of people from all over the world.

Tameside
08-04-2009, 01:39 AM
Hi Martti, I've found that if you do go below 1/50 and sometimes even at 1/50, if you lock exposure in daylight and pan-move the camera, zoom even, han-held you can get some light flicker, what is casuing this? have you seen it in any of your footage! on that basis is it better to get upto 1/100 to stop any flicker/strobing effect? is it actually best not to lock exposure if panning-zooming-moving, just lock shutter at 1/50-1/100 and iso and using an nd to keep the apertue down!

Tameside
08-04-2009, 01:54 AM
Is there flicker in this video or is it me? http://vimeo.com/5914386, not my video just something as an example from vimeo.

Barry_Green
08-04-2009, 10:33 AM
Martti is absolutely correct, of course. 1/60 (or 1/40 or 1/30) for USA/NTSC/60Hz users, 1/50 or 1/100 for PAL/50Hz users.

Ben_B
08-04-2009, 10:40 AM
What's wrong with slow mo-ing 1/60 720p60 in a 24 project? Little motion blurry? I guess if you know the clip is going to be slow mo shoot 1/120 but I dont see anything wrong with, if you need the slow mo (having not known you would before post), doing it to 1/60 footage?

Barry_Green
08-04-2009, 10:44 AM
Blur is the issue, yes. You might be happy with the look of 1/60 60p slowed to 24p, but if you're trying to emulate the look of film slow-mo, it's typically shot more like 1/120.

Indyreel
08-08-2009, 08:25 AM
Martti is absolutely correct, of course. 1/60 (or 1/40 or 1/30) for USA/NTSC/60Hz users, 1/50 or 1/100 for PAL/50Hz users.


Barry,

Would your specs above be when shooting 1080 or 720?

Barry_Green
08-08-2009, 12:07 PM
1/60 is appropriate for either 1080 or 720.

1/40 or 1/30 could be used with 1080, but not with 720 (unless you don't mind your 720/60p becoming dropped to 720/30p).

offstandard
09-10-2009, 09:30 PM
I accidentally pressed some KEYBOARD combination (new keyboard) and the window closed :O so here I type again.

Been reading a LOT and there are a couple of conflicting issues I need resolved.

In college back a decade and a half ago, I studied Studio Arts with concentration on Drawing, Painting, Photography, and dabbled with Video and Computer Graphics, but it was all on 8mm tapes and 16mm films =) Trying to get back into this digital HD age is confusing me... not the least because I probably forgot all of what I learned.

The event I plan on shooting is a Jazz Festival that is outdoors, starts late afternoon and goes until 10pm. Most tripod shots and couple of pans from a Merlin. The first weekend I plan on using all kit lens (unless it gets too dark and then switch to some fast Leica M lenses)

Final product would be in 720p24.

Here are the questions:

- 1080i60 should be shot at 1/50, unless there are some artificial lights with different frequency then shoot at 1/60 > Neoscene pulldown to 1080p24 > drop to a 720p24 timeline (should I even bother with 1080i60 source when my outcome is going to be 720p?)

- 720p60 shot at 1/60 (1/120 for slow-mo) > can this be dropped into a 24p timeline directly as some say? or should this be pulled down before being dropped?

- last unrelated event question. If I shoot, let's say a bike trick (fast moving action) should the final outcome be in 720 30fps over 24p? Is there going to be a lot of difference in terms of "look"? I want these to come out like the x-games stuff, which seem to be sharp with not much motion blur.

thanks you! I think my mind is about to blow up from all the information overload.

Ben_B
03-16-2010, 11:53 AM
To bring up an old thread I have a quick question. If you're shooting in 50Hz lighting in a PAL country with an NTSC GH1, would the 1/50 shutter speed (1080/24p) prevent strobing? I know it could potentially cause it in NTSC territory, but somehow it feels right that you wouldn't get it in PAL?