I would definitely play around with it. Your not going to want to go too wide with 4 because odds are they will move around a bit and you’ll end up with some soft faces. Some key things to remember would be try to keep their faces all on the same plane of focus, that will allow you to shoot a little wider. Generally with 4 kids I would aim to shoot around f/4 but certainly play around. At that aperture you may want to consider moving them further away from the background. Keep in mind the closer you are to them and the further away from the background they are the more bokeh you will get!
In the shot above I used a two light setup. The main light, camera left, is a Profoto D1 1,000Ws head inside of a 50 inch Westcott Apollo Softbox. While the idea of mixing what is considered to be a high-end strobe with a budget softbox my not sit right with some, I find the indirect lighting source from a Westcott or Photek to give a really nice and even light. The 60 inch Photek Softlighter, which I also enjoy using, may only cost $95 but gives a really nice, soft, and even light. If these lower cost indirect sources are good enough for the likes of Mario Testino and Annie Leibovitz, then they are good enough for me. Clay Cook did an great article on these lighting sources, "Lighting Like Leibovitz," that you can find here.
Overall a beautiful backdrop. More yellow than I was expecting though. The yellowish center on mine is very large and bright, with much less brown/green than the one pictured. I used it for a dance troupe portrait and the yellow wasn’t flattering with everyone’s skin tone. Too bland. However, I changed the color in post and I LOVE the result. The yellow center became a natural bright spot under whatever color I painted with, and is a lovely effect. I have included pictures. The first one is mostly unaltered in color, just darkened a little. I am keeping the backdrop, knowing that I’ll have to be careful with subject/lighting or paint it in post-processing.
This kind of fabric has an amazing quality that absorbs light from flashes around the studio. It enables you to have a pitch-black (if using black velour) portrait background that will not reflect the light from your flash or lighting equipment. This way, you don’t have to worry about the direction of light affecting the background because it leaves no detail.
The StudioPRO 3000W's included backdrops add a lot of value and a professional touch that users love. The 10-foot power cord often eliminates the need for an extension, and can reduce anxiety over tripping on a taut line. The lightweight equipment and small case store easily, and if you travel a lot, you would be hard-pressed to find a more portable model.
A purchaser comments that the adjustable backdrop stand is sturdy enough to do the job and that it’s easy to put it together. He adds that it’s light and easy to transport and that he highly recommends it to anyone looking for portable background stands. Another reviewer shares that he bought three adjustable support frames and that he is pleased with the construction and the stability.
I'm a professional photographer and purchased this on the chance that it was as advertised. I shoot 8th grade graduation dances and have always used a black backdrop to make the images "pop". I was worried in buying this that there would be a lot of maintenance in getting the wrinkles out...worked perfect from package to hanging on the frame! Awesome product and well worth the money!
No more wasting your money on cheap vinyl. We've got just what you're looking for in a professional fabric photo backdrop. We print on high quality, matte finish, non-glare cloth with a dye sublimation process that exceeds expectations. We even have three different fabrics to choose from, allowing for further individualization! Other companies either print on subpar materials (like vinyl, muslin, or even paper!) or they print direct to fabric, which lessens the resolution and leaves you wanting more. Here at Photo Pie, we pride ourselves on providing excellent customer service through your entire ordering process. Whether you're needing a one time backdrop for a party or needing durable, wrinkle free backdrops for your photography studio, we've got professionally sublimated backdrops just for you!