looking for 1/50 shutter speed on AF100...

N

Nicholas Natteau

Veteran
Just got my AF100. Does anyone know why there is no 1/50 shutter speed choice on the AF100?

I thought when you shoot at 24 fps, that you should use 1/48 or 1/50 shutter speed.

So how do you do this on the AF100???

Thanks very much in advance.
 
I presume you want 1/50 because it was the closest to 1/48 on DSLRs. The AF100 has 180º shutter, which is equal to 1/48 when shooting at 24fps.
 
Thank you both for replying. Correct dcarstens, yes, I was looking for 1/50 as the next best shutter speed to 1/48, but if 180 is equal, problem solved. Thanks very much for helping.
 
Yeah, I use the 180d as well because I'd rather be at 1/48 and get that tiny bit of longer exposure :) Although, remember, if you are shooting around certain lights, especially certain fluorescents, 1/60 is the best to use to avoid issues.
 
If you are using PAL, yes, you can switch the camera to 50Hz instead.

Proper shutter? I think that depends on what you are doing. For VFX work I do tend to shoot with a faster shutter if I am rotoscoping a bunch of stuff. In addition, if I am going for a strobe look like saving private ryan, I also go with a faster shutter.

In addition, not all cinema cameras apparently do 1/48 either (I am just requoting because I don't shoot film, but Barry Green has talked about it).

He said he shoots almost 1/60 exclusively to avoid ANY issues with lights in the US. Given the line frequency is as such.

(PS don't you mean 180d? :) )
 
tipota said:
Nice tool - may help also to clarify some of the fickleness in flicker-discussions..... ;-)
Click to expand...

regarding lamps, hertz and shutter speed yes, but what about filming off lcd monitors? I am filming a lot off monitors lately.....the GH2 behaves worse than the HVX! wonder why...
 
Monitors - according to the DoP's I work with - are a pain in the behind because they run on such different frequencies and you get also problems with phase shifting. The ways how to avoid such problems are beyond my technical understanding - not being a DoP and coming from film rather reluctantly to the world of video recently, I may add - but you have to get into sync with what the monitor produces or vice versa bring the monitor in-sync with what the camera does. There should be enough people here to give a better explanation than I am able.

If you shoot with the gh2 in Germany or any other 50Hz grid country, you will run into trouble with certain shutter speeds because it runs only this - for us PAListanis - silly 24p in the high quality mode. While with 25 p we would be save nearly all of the times until phase shifting starts to occur. With my gh13 this usually only happens with very high shutter speeds I would not want to shoot with anyhow.
 
PAListanis hahaha :-) yes the 24p must be the problem I noticed. Glad I kept my GH13. I know about the frequencies and how you had to sync old CRT´s with the cam via cable and such and how the fat black line would crawl over the image if you didnt. Now with the GH2 I get many tiny slim lines at all shutter speeds, gotta check the manual of my monitor...... PAListani thanks for this new one:-)
 
Last time we did run into problems was when we shot a scene in a big supermarket: cash-point displays, monitors we could not avoid to have in the frame (and could not manipulate) and the lights of a big freezer all running on strange frequencies through their different ballasts. Flicker-nightmare.

This is purely speculative on my side: and increment of 24 should help - 48 / 60 / 72 (monitor frequency) should do it. But I come from mechanics and there may live some wondrous creatures in the world of digital signal processing an older registration pin like me knows nothing about..... ;-)
 
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I was using my AF100 pointed at my synth rack that has a couple hundred LEDs in it. Wow, it is amazing how different they are timing when you are looking at 1/1000 and seeing all the different patterns it produces. Luckily, with synth gear, it looks cool :)
 
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