I have an HPX170 and a Skekonic dualmaster l-558r. If I set the ASA to 500 and the frames to 24 (assuming I'm shooting 24p) will that give me the right exposure or do I need to set the shutter somehow? Thanks.
It will give you a ballpark exposure. But a light meter will never give you the true accurate exposure for a video camera. You're much better off learning to use the waveform monitor, it'll be a far more accurate exposure indicator than a light meter ever would be.
Please note the the scene file, or gamma setting you have will affect the ISO of the camera as well. You really need to do a ISO test with you light meter with your camera set up as you are going to shoot with it.
Yes, the built in waveform monitor is better. I only used a light meter for location scouting or finding ratios.
Edit: OMG Barry you have over 33k posts. What the heck. =)
I appreciate the responses to use a waveform monitor and the like and I'm learning how to use them. I think it is important to know how to use/set up a light meter whether it be video or film.
If anyone has the answer to my question I'd appreciate it. Or what is the angle of the HPX's standard 1/60? Is 180 degree shutter or different?
The problem is that your question cannot be answered because video cameras' perceived sensitivity can vary significantly. There is no way to use a light meter accurately with a video camera (unless you're talking about a Sekonic 758 Cine with programmable gamma curves...)
So if you want to get into a *ballpark* guess of what the exposure should be, use 1/50 second exposure or 180 degree shutter @ 24fps, 500 ISO. Just don't be surprised when in low light situations the meter tells you something that's about a full stop away from what the camera actually needs.
Thats all I wanted to know. I don't feel like buying a new meter or selling mine, I just wanted to know, if needed, that mine, would be fine. I have a sekonic l-558r, which wont allow me to set shutter speeds (I realized this after I got it, my own fault). It's a great meter and really useful for determining rations/ if a green screen is even but I wanted to know if the default 180 would be okay with the default 1/60 (144) of the hpx170. Thanks Barry!
You can set the HPX170 to 180 degrees if you want.
And the waveform monitor in the HPX170 is *infinitely* better for setting greenscreen exposure than a light meter. You can tell at a glance where there are problems, rather than hunting over the screen surface with a light meter.
Also, the default shutter speed on an HPX170 depends on what mode you're in; if you're in 24p mode the default is 1/50, if you're in 60p/60i mode the default is 1/60.