Now that we've got the basic definition down, let's run through the various materials and techniques you can use to make a light diffuser.

In the same fashion as the shower curtain, check out the video below to learn how to make a frame and use sheers to make a light diffuser.

Now in this shot that I’m showing you right now, you’ll see a mailbox. You can read the name on it and then as the dolly keeps moving it’s revealed that there’s a man walking up to his front door. And so we get a connection between this man and, presumably, what is his name or his mailbox. And if it’s not him, then we’re going to find out who “M. Dooley” is.

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DIYlight diffuser

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Next on our list is something you might not even need to go out to buy when making your own DIY light diffuser — a white bed sheet. A thin white bed sheet can be the perfect material to diffuse light softly into your scene.

Light diffusercover

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Like I said, I can’t give you any particular advice on how to approach it except that you’ll know what to do — and, if you don’t, you’ll be told what to do.

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Outdoorlight with diffuser

Hopefully this list has given you a few options to try out and experiment with to find what works best with your lighting gear. Once you have the proper tools to create a light diffuser, you’ll be amazed at what kind of shots and lighting setups you can create.

Once you’ve created your homemade light diffuser, you’ll want to learn a few techniques on how to use it. In our next article, we dive into soft light photography as well as a few tips on how to use a light diffuser to create it.

One thing to consider when creating your own DIY light diffuser is what material will work best with the light source. This is especially important if you are using non-LED lights that tend to produce quite a bit of heat.

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A light diffuser is a semi-transmittant piece of material placed in between a light source and a subject to diffuse the light as it passes through the material. To create diffused light, cinematographers and gaffers often use these light diffusers. This material does not solely block or cut light, but redirects light as it passes through for a diffused light spread on a subject.

Now when you’re on set pulling focus, you want to make sure that you do it with still some level of subtlety otherwise it’s not nearly as effective. So just take into account the action of the scene, the camera movement of the scene, and the tone of the scene and you’ll be well on your way to keeping those rack focuses invisible to the eye.

Light diffuserSheet

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And so this is one of those cases where the action in a scene dictated the speed of my rack focus. It would’ve been weird if the door shut and then I got it in focus which is what was happening those first couple takes that everybody was sort-of wishy-washy on.

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How quickly does the new thing come into frame? If it comes in very quickly, you’re going to have just as quick a rack focus. If it sort-of creeps in, you can slow it down a little bit.

Bestlight with diffuser

On the other hand if you’re shooting, say, down a hallway and you’re rack focusing from — let’s say there are posters along the wall. You’re rack focusing from one poster at the end to one poster in the foreground.

Light diffuserhome depot

Sheers are essentially lightweight fabric that are meant to go over windows to soften the lighting of a home coming through the windows. This makes it the perfect material to use for a homemade light diffuser.

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Kyle DeGuzman graduated from San Diego State University with a Bachelor of Science in Television, Film, & New Media. He currently resides in Denver, Colorado spending his time writing, filmmaking, and traveling.

Say you want an extremely soft lighting aesthetic. This means you want a large, diffused light source close to your subject. You may not want to use ten rolls of parchment paper to increase the area of diffusion, so opt for our next DIY light diffuser — a frosted shower curtain.

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Diffused light is an incredibly important tool for any photographer or cinematographer. It’s soft, flattering quality is used in various setups. Of course, not everyone can afford expensive softboxes or silk flags. Luckily, making your own DIY light diffuser is not as difficult as it may seem. In this article, you’ll find various inexpensive ways to make your own light diffuser.

A frosted shower curtain’s semi-translucent material makes it great for diffusing light and providing a large diffusing surface area. Check out the frosted shower curtain DIY light diffuser in action in the video below.

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Finite microscope objectives are designed to project a diffraction-limited image at a fixed plane (the intermediate image plane), which is dictated by the ...

Now this doesn’t have to be a physical action all the time. Sometimes the action in a scene could mean dialogue. So you have two characters in different perspectives — this one speaks and then you rack focus to this one finishing their sentence (or something like that).

You maybe remember it was about a tennis player who goes into a baseball batting cage to practice for Andy Roddick’s serve at the Australian Open. I actually wrote about, in the post, this particular shot where I mentioned how the tennis player goes into the batting cage and the door shots. And I had to rack focus from the actor’s face to the door of the batting cage.

While creating the homemade light diffuser frame is optional, it can be more effective at diffusing light in a fixed position. One of the problems you may run into is that the white bed sheet you have might be too thick and cut more light than you’d like. If this is the case for you, our last homemade light diffuser material may be your solution.

As you can see, the parchment paper can handle high heat. You can simply use some C-47s (clothespins) to clip the paper onto the barn doors of your light or use them close to your light source.

Not only is the frosted shower curtain a great, large light diffuser, it is also relatively cheap to buy. Try it for yourself to see how much of a difference it can make in your lighting setups.

And a very important part of doing a rack focus right is the speed at which you do it. In my mind there are three things that you need to take into account when determining the speed of a rack focus.

An optional DIY step in using a white bed sheet as a light diffuser, is to create a frame for it from PVC pipes. Check out how simple and relatively cheap making this frame for your DIY lighting diffuser can be in the video below.

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Now if you don’t know what a rack focus is, it’s when you have two subjects in the frame and you shift the focal plane from one to the other during a shot. Essentially when you do that, you’re also shifting the audience’s focus between the two subjects.

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Parchment paper is great at diffusing light and handling high amounts of heat. Check out this video to see how well parchment paper can diffuse light for just a few dollars.

And in my first couple takes, I botched it — I didn’t hit my marks, I didn’t do a very good job. The director, knowing we were on such a tight schedule, was ready to move on, but I spoke up.

Ledlight with diffuser

So the final thing that’s going to affect your rack focus is the tone. The tone of the story, the tone of the scene, or even of a particular shot.

So I want to show you some examples of rack focuses from different projects I’ve worked on and sort-of explain how those three things played into it. Hopefully you can take that back with you on set and help give the DP [Director of Photography] a stronger shot to fulfill the director’s vision.

The second thing — and probably the most prevalent scenario that influences the speed of your rack focus — is composition/camera movement.

A light diffuser can be created in various ways, but understanding what it does in the most fundamental way will help you understand how you can achieve diffused light through whatever means you have.

Normally we just try and keep things in focus and keep it invisible, but with a rack focus, you’re actually bringing the focal plane to the awareness of the audience. When it’s done right, they may notice it, but it’s a really cool trick and master filmmaker’s have been using it for years.

Pulling focus is arguably the 1st Assistant Camera's most important duty. A shot can be beautifully lit, impeccably framed, and feature Oscar-winning acting, but if it's not in focus, it's likely to end up on the cutting room floor. That's what's at stake for the focus puller.

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You don’t necessarily need to make it so quick, unless that’s what the director or DP wants. But you can slow it down a little bit because you’ll have so many posters between the other ones that, as the focus is happening, the audience’s eye can follow along.

So one thing to notice is how the rack focus is almost invisible. The reason it’s invisible is because it’s hidden inside the action. When the actor steps in his face is in focus, as the door is swinging — because there’s motion blur you wouldn’t be able to notice that it’s out of focus — but by the time it shuts, boom, it’s in focus and you can see the sign.

When used appropriately, it’s so engrained in our cinematic language that even though it could draw you out of the movie and say, “Hey, you’re watching a movie didn’t you just see that focus shift?” that we just accept it when done right and when done with subtlety.

So this first shot I want to show you is going to demonstrate how action affects the speed of a rack focus. This shot is from a commercial that I worked on that I actually wrote about on this blog.

But as an example for this type of tone affecting the speed of a rack focus, I want to point to a very popular shot that you see a lot. And that’s the point-of-view “wake up” shot. You see it a lot in war movies where like a grenade goes off and all of the sudden you’re at the point-of-view of the guy who’s been hit by the grenade. He sits up and everything’s out of focus and then it comes into focus.

Ceilinglight with diffuser

And you want to be on top of the rack focus before the audiences sort-of catch on to this out-of-focus thing in the foreground or in the background — because they’ll see the movement of it. You want to get the focus to it as quickly as possible — without rushing it — to make sure they can find out what “that” is.

Usually when you hear people speak about pulling focus, they’ll mention how it’s both an art and a science. The science part is measuring your distances, calculating them on the fly, and being very precise in your measurements. The art part is the “touch” you put into pulling focus — how fast do you do it, how long does it last, when do you perform it.

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That’s why you want to make sure you nail it — and not just focus wise. You also want to perform the rack focus with the right style and the right speed.

There’s the action in a scene — whether it’s character action or some other type of action. There’s camera movement/composition. And then there is the tone of the scene, the tone of the story, or even the tone of a particular shot.

If there’s a lot of empty space between your old focal point and your new focal point, you don’t want to take a lot of time getting to the new one because you’re going to have nothing to focus on in between them — there’s just going to be dead space. And you’re going to have some excruciating few seconds or even half-seconds where everything’s out of focus and that’s not what you want.

Thanks for watching guys, I hope this was helpful to you! And make sure to check out the rest of my “How to Pull Focus” series on The Black and Blue.

You know, I can’t give you any particular advice on which one to use because it’s so circumstantial. It plays so heavily into the particular project that you’re on or, even within a project, which shot you’re on.

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Because if you land it late it is not as effective and it is going to be noticed by everybody watching — including the audience.

It’s a very popular shot to have either a dolly or steadicam or jib or a crane or some type of camera movement device move a shot along and, all of the sudden, something new gets revealed into the frame.

But I’ve never really been in a situation where I haven’t instinctively known how fast to perform a rack focus. Because usually I watch rehearsals, I get a feeling through the dialogue what’s the scene about, or I simply ask the DP or the director. If you watch enough movies, you really get a sense for what’s appropriate.