Filming at Night - DSLR

messplay

messplay

Active member
shooting with a 50mm f/1.4 and ive noticed it on my other lense as well but mainly tonight (again).

i am shooting have an aperture of 60 @ 1.4-2.0 with just street lighting and i notice on my screen and even moreso on the computer a rolling black bars. they are not necessarily bars but blurred black lines that roll fmr top to bottom. at any given time there are maybe 4-5 on the screen and they just keep recycling coming from top to bottom.

is there anyway to fix this? highly annoying.

i've also noticed it in some daytime shooting indoors with natural light and just regular lighting.

 
Google the 180° rule for filming. (The one about the shutter speed and fps)That rule's essential for filming, always :)

Then of course you can put the ISO up, but that usually gives you a grainier and motion blurred look, I think, maybe it's just my imagination :)
 
Forgot, the black bars appear because you have the wrong shutter speed according to your fps. Basically, the 180° rule states that your shutter speed has to be at least twice your fps, so if you're filming @24fps you must have the shutter speed at least at 48 (only goes to 50 on DLSR's). And for 60fps you want a shutter speed of 120, that usually gets rid of the black bars for me and my t2i :)
 
This has happened to me too at my local skatepark. Its caused by the certain type of lighting, the way to fix it is to adjust your shutter speed down i believe
 
not to thread jack

if i go into video settings and i do the 1920x1280 24 that means im shooting 24p/24fps? and my shutter speed/aperture should be at least 48 which is the number on left up top right? (just checking)

and although it only says 50 for the other two settings, that means im shoting 60fps or 50fps? i don't get it...
 
no, the black bars are from the lights, which have a frequency of 60hertz in NA and 50hertz in the UK/Europe. You get them when your frame rate/shutter speed isn't a multiple of 50/60 or a prime factor of it. This is why PAL cameras shoot 25/50p in the UK/Euroland and 24/30/60 in the US.
 
This has NOTHING to do with the 180 degree rule.

And like 1337 says: it has to with the frequency of the electricity output. What happens basically is that lights aren't *on* all the time, they just appear to be so because our eyes/brain can't register the flickering from the lights, but the camera can.
 
well if you shot 24 or 60 in europe you might have a problem, i dont really understand the problem youre experiencing now
 
like banding...i guess it is out of sync with the refresh rate of my power supply? if i go outside or im under flourescent light specifically i notice like outside my apt door or when i was filming inside my dads restaurant once, id get these lines that come down on the screen, they arent like pixelated lines that look like bars but like i said 4 of these things could fit from top-bottom on the screen at any given time. ill take a vid tomorrow and post it...
 
im gonna say we need screen shots or videos now to help, guess we'll see tomorrow
 
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