本帖最后由 bobnanlee 于 2016-2-2 06:33 编辑
我顺便给你分享一节课，你看看大师天光直射没有hmi的情况下是怎么用反光板平衡天光。希望你多学习学习。图看不见你就一个一个点开看吧，我没功夫给你编辑了
I’ve been asked many times about how to light people in daylight scenarios so that the background and talent, who might be in an overhang or darker lit scenario, are balanced with their lighting ratio. With this article, I’ll show you how with our actress Monette. We have Monette sitting on a chair, and we have hot sunlight falling on her hair. There isn’t a whole lot of sunlight, and the sky is burning out pretty bright and doesn’t have any shape. In these types of situations, it can be difficult because the budget may be too small to use big HMIs to blast the light on her face to balance the background with the foreground.  Image of Monette without any alterations
The solution I have here is mother nature. We can use two 42”x42” silver reflector boards to bounce natural sunlight. These boards have two different sides, a hard side and a soft side. Reflecting the sun to balance your exposuresThe soft side has little wavy silver flex that spread the light and make the it less harsh.  42”x42” Reflector Boards, soft side
We have very hard sunlight today, so we are actually going to use the hard side to balance our foreground with the background.  42”x42” Reflector Board hard side
We raise the reflector boards high up into the air so the light can come down and illuminate Monette.  Notice the reflector boards are high so light can come down and illuminate Monette.
Now I’m going to have Larry direct sunlight from one of the reflector boards right onto Monette.  Notice how hard the light is.
That’s pretty darn bright, but now let’s go ahead and beam the second reflector board onto Monette too.  Notice both reflector boards are aiming light at Monette.
The screen right reflector board is actually shadowing the board on the left, so we slide it over a bit.  Sliding the reflector board on the left so it’s not shadowed by the one screen right.
Diffusing your reflected source to softenWe have their positions locked, and now we are going to diffuse the light from the reflector boards with some diffusion frames to make it nice and soft. First we come in with two 4×4 grid cloth frames.  4×4 Grid Cloth Frames
With the grid cloth frames, the light on her face looks much better and not so harsh like it was before without any diffusion. We can increase our exposure so we can hold that background as well.  Side by side comparison of no diffusion vs with two grid cloth frames.
Shaping your ambient daylight with the use of negative fillThe light on her face is still looking kind of boring, so I’m going to add some negative fill. I actually use a two sided ultra bounce. The ultra bounce has a light side or a black side. I’m going to use the black side and set it on Monette’s left side. I also set a 4×4 floppy next to it to add some more negative fill.  Ultra bounce camera right, black floppy on camera left
Let’s look at what the image looks like now with that negative fill.  Side by side comparison, with grid cloth flags and no negative fill on the left, and with grid cloth flags and negative fill on the right.
This is looking pretty good. We created a nice soft wrappy light on her; we’ve brought in a little negative fill; we got the nice sun flowing in on her hair; and if it’s still a little too hot, we can take it down a bit more. To do so, we set a double net onto a c-stand to take out more light.  Notice the double net
Making final tweaks to finesse your interview shotWe’ve doubled down the light with the double net which takes out one stop, and we’ve got a creamy source coming through the 4×4 frames.  Grid cloth and negative fill vs grid cloth, negative fill and double net
Compared to the image before from our beginning set up with only the grid cloth frames, the image looks much better.  Only grid cloth diffusion frames vs grid cloth frames, negative fill, and a double net
Here is a top down schematic of the setup with the grid cloth frames that were used on Monette:  Note that Monette is sitting in the shade
Making the source even bigger to wrap the light around the faceThe image looks awesome, but what if you don’t have 4×4 frames, or you don’t want to carry those in your car? Well, you can use 8×8 grid cloth diffusion that you can drape over the c-stands.  Draped 8×8 grid cloth diffusion over c-stands
The grid cloth draped on the c-stands still gives us that beautiful, wrappy, creamy light without the hassle of the big frames.  Side by side comparison of grid cloth flags vs 8×8 draped grid cloth diffusion
Here is the top down schematic of the set up with 8×8 grid cloth diffusion draped over c-stands instead:  Note Monette is sitting under trees and that the grid cloth has changed from 4×4 frames to one 8×8 grid cloth diffusion.
In conclusion, this is what we used to light Monette:- Two 42”x42” Reflector Boards. We used the hard side to direct light onto Monette.
- Two 4×4 grid cloth frames to diffuse, or one 8×8 grid cloth draped over the c-stands to soften the light from the reflector boards.
- One double-sided ultra bounce (black side) and one 4×4 floppy to create negative fill.
- One 4×4 double net to create even more negative fill.
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发自-拍電影APP
发表于 2015-6-30 11:18
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