Projector Calculator Distance
Mateos Weinzapfel
A projector's distance from the lens to the screen surface is called the Throw Distance. The throw distance and the size of the imageit produces on the screen are proportional to each other based on the optics of the lens. As you increase the distance between theprojector lens and the screen the image will also increase.
A projector's distance from a screen andthe size of the image it produces are proportional to each other based on the optics of the lens. As you increase the distance between the projectorand a screen the image will also increase. If your projector has a zoom lens, the lens can be adjusted to change the size of the screen image without changingthe distance of the projector. Since each projector lens is different, an online projection calculator tool will help you calculate the size of an imageon a screen relative to how far the projector is placed from screen.
For any given projector, the width of the image (W) relative to the throw distance (D) is know as the throw ratio D/W or distance over width. Sofor example, the most common projector throw ratio is 2.0. This means that for each foot of image width, the projector needs to be 2 feet away orD/W = 2/1 = 2.0. So if I'm using a projector with a throw ratio of 2.0 and I have an image width of 5 feet, then my throw distance must be10 feet. So the throw ratio is a simple formula that let's you easily compute throw distance or image width given that you know one of thesemeasurements. A projector zoom lens will have two different throw ratios, one for the minimum zoom setting and one for the maximum zoom setting.
A short throw projector is a projector with a lens that has a throw ratio of 0.4 (distance/width) or less. These projectors are ideal for rear screen applicationswhere the area behind the screen is limited, or for a wall mounted application where the projector will be mounted within 1 or 2 feet from the screen. Thegoal of these projectors is to produce as large of an image within the shortest amount of space between the projector and the screen.
If you ever wanted to set up a home cinema, we've got you covered. This projector calculator is a handy tool that determines the perfect viewing distance (that is, the distance between the screen and your amazingly comfortable couch), the ideal throw distance (the distance between the screen and the projector), and the optimal brightness. With our help, setting up your personal movie theater becomes a piece of cake!
Your first step towards setting up the perfect home cinema should be to properly calculate the viewing distance. If you're sitting too far from the screen, you will not see every minute detail. On the other hand, if you're sitting too close to the screen, the whole picture might not fit in your field of view; for example, if you're concentrating on the left part of the screen, you won't notice what's happening on the right.
To find out the proper viewing distance, fill in the screen properties: the resolution of your movie, the aspect ratio of the screen, and its diagonal size. These three basic values are vital for determining the optimal setup of your home cinema.
The next step in setting up the perfect home cinema is to choose the proper projector to ensure correct brightness levels. First, you need to click on the Viewing brightness heading of our tool and input the following values:
Our projector calculator estimates the screen's brightness in fL (foot-Lamberts). You can also switch the units to cd/m (candelas per square meter) should you choose to use SI units. The brightness levels are as follows:
The third and final part of our tool is the projector throw calculator, which deals with the throw distance, or, in other words, the distance between the projector and the screen. To calculate it, you will need to read the manufacturer's specifications for your projector and find a value called the throw ratio.
The manufacturer of each projector specifies two values: the minimum and maximum throw ratio. To input these values, first, click on the Throw ratio and distance heading of our calculator to display these variables. After you input these values into the projector calculator, you will obtain the minimum and maximum throw distance perfect for your screen dimensions. Now, all you have to do is set up the home cinema according to the results you got.
There's a lot more to setting up your perfect home movie theater - perhaps you want to calculate the number of seating rows or try to ensure that audience members' vision in the last row is not blocked. Make sure to take a look at the Carlton Bale's website, who provides a lot of helpful tips and an elaborate calculating tool on which this projector calculator is based.
A projection calculator is used to calculate a screen size when a projector is a specific distance away from the screen. As you move a projectoraway from the screen or wall, the image will get bigger, and as you push the projector closer to the screen or wall the image will be smaller. To properlyfit your image onto a screen you need a projection calculator tool or throw chart to tell you the image size dimensions at the correspondingthrow distance.
To determine the Image Size (screen size) enter a distance measurement number in the Throw Distance value box and hit the Enterkey on your keyboard, or slide the Throw Distance slider back and forth until you find a number in the value box that represents thedistance between the lens of the projector and the surface of the screen. On the graphical representation of a screen in the middle of thecalculator, you will see dimension lines that will tell you the height, width, and diagonal measurements of your image.
To determine the Throw Distance for where you should place your projector in the room, enter an image diagonal measurement number in the Image Sizevalue box and hit the Enterkey on your keyboard, or slide the Image Size slider back and forth until you find a number in the value box thatrepresents the diagonal distance between the top right corner of your image (screen) and the bottom left corner of your image (screen). Onthe graphical representation of a projector in the middle of the calculator, you will see dimension lines that will tell you the Throw Distancemeasurement between the front of the projector lens and the surface of your wall or screen.
If your selected projector has a Zoom Lens then the projector's Throw Distance or Image Size can be finely adjusted by moving theZoom Lens ring on your projector. The Zoom Range slider in the calculator will help you calculate the changes made by a Zoom Lens.
Using the blue padlock icons next to the Throw Distance value or Image Size value you can havethe Zoom Range slider only affect one of the two controls.If you press the blue padlock icon next to the Throw Distance value so that theicon shows a Lock symbol, then moving the Zoom Slider will onlyadjust the Image Size bigger or smaller as would be visually represented ifyou turned the Zoom Lens ring on your projector's zoom lens to make the image bigger or smaller. If you click the padlock next to the Image Sizevalue so that the icon shows a Lock symbol, then moving the Zoom Slider will only adjust the Throw Distance position of the projectorin your room. The position of the projector in your room changes because you will need to move the projector closer or further away from the screento maintain the same image size to match your screen when turning the zoom lens ring.
If you've chosen to block third-party cookies on your browser, your cookie preferences won't carry over from benq.eu to benq.xx and vice versa. Please make sure to set your cookie preferences in both places.
These cookies help to improve the performance of BenQ. If you want to opt-out of advertising cookies, you have to turn-off performance cookies. We also use Google Analytics, SessionCam and Hotjar to track activity and performance on the BenQ website. You can control the information provided to Google, SessionCam and Hotjar. To opt out of certain ads provided by Google you can use any of the methods set forth here or using the Google Analytics opt out browser add-on here. To opt-out of SessionCam collecting data, you can disable tracking completely by following link -not-to-be-recorded/. To opt-out of Hotjar collecting data, you can disable tracking completely by following link -not-track/.
These cookies are used to track your activity on the BenQ website and other websites across the Internet, help measure the effectiveness of our advertising campaign and deliver advertisements that are more relevant to you and your interests. We use various advertising partners, including Amazon, Facebook, and Google. These cookies and other technologies capture data like your IP address, when you viewed the page or email, what device you were using and where you were. You can find out how to avoid them below.
The relationship between projection distance and screen size is defined as Throw Ratio = Throw Distance / Image Width, which can calculate a distance 8.2ft from the wall for projection of a 100-inch image with a 16:9 aspect ratio (image width is approximately 7.2ft).
Look for information about screen size and distance, typically expressed as "screen size @ distance" from the screen. In this example, the specification "100"@ 8.2ft " means that the minimum distance you will need is 8.2ft from the projector to the wall to get a 100-inch screen size, which is an ideal projector set up in a space of about 21 sq. ft to 32 sq. ft.
The projection is determined by your room size, where the projector will be placed, and the distance from the projector to the projection screen/wall. To select the ideal projector for your home, you will need to measure the length and width of the room to use the maximum distance the projector can be placed from the screen to search for the specific projector model that will meet your ideal screen size needs. If the space has an irregular shape, such as an L shape or a polygon, measure the distance between the two walls as the reference for purchasing a projector. Keep in mind the best setup position is where two walls are furthest apart in the space.