spesmeadeus wrote in post #9828763
Thanks, any idea on how to whiten a background when the people are standing very close to it?
Is there any way to back light from behind the backdrop?
Sure, if your backdrop is translucent enough. Use white ripstop nylon, a few yards from the fabric store and drape it over your background stand. If you have a large enough softbox for the type of photo you're taking, you can use it as a background as well (e.g. for head-and-shoulders shots).
Really your problem here is with ratios. Some of your pics have a fairly white background... white enough that I wouldn't notice anything wrong with it. Others, it's more of a light gray. Your background light power needs to be set in correct proportion to the power of your front lights in order for the background to show up as white. So if you are using a hotshoe flash as the background light, you need to turn your Bees way down and shoot at a lower f-stop but keep the background light as high as it will go. Keep adjusting your aperture larger and your front lights lower until you get a consistent white background. If you do this properly, your background will turn white no matter how far away your subject is from the background. But you will receive higher amounts of "wrap" if the subject is very close to a very relatively bright background.
Here is a quick photo I just took of myself to give an example of using a softbox as a backdrop. I have an AB800 at full power through a large foldable softbox (both baffles installed) directly behind me. I am standing so close that I am practically touching it with my shoulder blades. For front lighting, I am holding two white sheets of foamcore board in front of me to either side to reflect the light back into my face. You can see the edges of the foamcore boards on either side of the photo. You can see how I have a pretty large amount of "wrap" around my face and neck, and elsewhere as well. This was shot was taken at f/14. Obviously there are issues with this photo, but it's just to illustrate the point.
