I need to shoot some portraits of people’s Halloween costumes at night where there may be little to no ambient lighting (I will not be in the same spot with the same ambient lighting the whole time). I will use a Sony A7IV, a 35 f/1.4, and a Godox V1. I shoot in manual on the A7IV, and will be in TTL on the flash. I have very little experience with flash photography, and I just ordered it and it will not even arrive until Friday.
1.) I will set my aperture at f/1.4 to let as much light in as possible, though I might need to change this if I am shooting more than one person at a time, and they are not standing close together, etc. I will then play with the shutter to lower it as much as possible to get even more light in. Is there a shutter speed that I should not go below? Does it matter since I will be using Flash?
2.) After this, do I then just adjust ISO high enough until I can see the background better? I definitely want to avoid going high with ISO and getting noise.
3.) Should I be metering in multi mode, or should I spot meter somewhere on the background?
4. After this, I plan to just turn on the flash in TTL and play with the exposure compensation until the subject looks nice in the foreground. Is there anything I am missing with my steps?
Thanks for any help!!!
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Depends on where you shoot, if bouncing flash. Start with. Iso set to 1600 with auto iso high limit iso 6400. Shutter 1/80th f4. (Aperture can be changed according to situation) Flash on ttl. Maybe ttl+1 depending on situation. If this is still too dark you can bring the shutter speed to 1/40th.
If shooting direct flash/ flash modifier etc… same iso and aperture. Shutter at 1/40 flash ttl -1.
You want small group of people totally in focus. You go f1.4, you maybe get a face in focus and everything else is bokeh or blurry.
You can go f4 or f8 but it has an affect on ambient lighting if you get a black background or not.