Balancing ambient and available indoor light

One of the last things I need to get comfortable with. You walk in and the church has quite a bit of light coming in through the windows with strong tungsten lighting. Shut the flash off, bump up the ISO and do a CWB? Shutter at sync speed to kill some of the available light?

Last question. Is it possible to do a CWB with the flash? I have not had any success trying that.

You can do custom white balance with any light source or mixture of light sources. Or you can shoot RAW and use a neutral calibration target to set the white balance in post. Honestly, that's the easy part.

The hard part (sometimes impossible) is getting the "correct" white balance with a mixture of light sources. If you have sunlight coming in through the windows, and tungsten above, the blended white balance will be different, depending on location and direction of your subject. You can gel your flash to match tungsten, or leave it naked to match daylight, or you can punt and go somewhere in-between (like maybe a half CTO gel). But if you mix light sources it's gonna be a nightmare any way you look at it.

digital paradise wrote in post #12631069
Shut the flash off, bump up the ISO and do a CWB? Shutter at sync speed to kill some of the available light?

Last question. Is it possible to do a CWB with the flash? I have not had any success trying that.

Never been in the situation, but how about high speed sync, with a gelled flash?

HSS won't help you increase the flash/ambient light ratio. HSS is like a continuous light source that lasts through the duration of shutter curtain movement. Once you get past X-sync shutter speed, the shutter limits the flash exposure just like it limits the ambient exposure.

Curtis N wrote in post #12631182
You can do custom white balance with any light source or mixture of light sources. Or you can shoot RAW and use a neutral calibration target to set the white balance in post. Honestly, that's the easy part.

The hard part (sometimes impossible) is getting the "correct" white balance with a mixture of light sources. If you have sunlight coming in through the windows, and tungsten above, the blended white balance will be different, depending on location and direction of your subject. You can gel your flash to match tungsten, or leave it naked to match daylight, or you can punt and go somewhere in-between (like maybe a half CTO gel). But if you mix light sources it's gonna be a nightmare any way you look at it.

So for the neutral calibration target does that include flash? I helped a friend shoot a wedding last summer in those conditions. Huge windows letting in a lot of natural light. chose M mode but I probably should have shot AV and used flash as fill. I know you can achieve this in M as well. The flash was a bit overpowering in that situation. Inexperience. Just want to make a better initial decision next time I'm faced with that. The reception had low a white ceiling so I was in heaven.

digital paradise wrote in post #12631446
So for the neutral calibration target does that include flash?

The camera will record the light bouncing off that target. If you have your flash on when you shoot the target, then it includes flash.

Try not to overthink this.

Thanks for your help and advice. Overthinking things. Guilty as charged