What is throw distance for a projector?
Aspect Ratio Calculator. Calculate aspect ratios for video and images using our calculator to solve, reduce, scale, or compare aspect ratios and resolutions. Are You Planning a Home Improvement Project? Get hassle-free estimates from local home improvement professionals and find out how much your project will cost. This calculator helps converting the size and dimension of a screen (in cm and inches) into each other. Trying to figure out the required size for your 16:9 HDTV projection screen? This tool calculates 2 of 3 dimensions for you in cm and inches. Social club twitch prime casino.
A projector's distance from the lens to the screen surface is called the Throw Distance. The throw distance and the size of the image it produces on the screen are proportional to each other based on the optics of the lens. As you increase the distance between the projector lens and the screen the image will also increase.
How far do you put a projector from the screen?
A projector's distance from a screen and the 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 projector and 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 changing the distance of the projector. Since each projector lens is different, an online projection calculator tool will help you calculate the size of an image on a screen relative to how far the projector is placed from screen.
What is a throw ratio for a projector?
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. So for 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 or D/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 be 10 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 these measurements. A projector zoom lens will have two different throw ratios, one for the minimum zoom setting and one for the maximum zoom setting.
What is considered a short throw projector?
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 applications where 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. The goal of these projectors is to produce as large of an image within the shortest amount of space between the projector and the screen.
Widescreen Aspect Ratios
In this post, we’ve rounded up the best info on aspect ratios – learn how they’ve evolved over time and which one is right for your film or video project!
One of the fundamentals of film and video is aspect ratios – the relationship between height and width in regards to image size. The aspect ratio of an image is dependent on the camera in which it was shot, as well as the method used for delivery/projection. Many people are most familiar with aspect ratios when looking at televisions, as we’ve moved in recent years from the classic 4:3 sets to HD widescreen 16:9 sets. These are the two most common video aspect ratios.
To understand a bit more, check out this aspect ratios overview from the early days of film to modern HD standards. John Hess from FilmmakerIQ.com knocks it out of the park with his terrific history of film and video aspect ratios:
Widescreen Ratio Calculator
Today HD video is most commonly shot on the 16:9 (1.77:1) widescreen standard, while films often use a 1.85:1 or 2.39:1 ratio.
So, with a multitude of choices, how do you know which aspect ratio is right or your film or video project?
For a practical perspective on aspect ratios geared toward film and videomakers, watch this quick tutorial from video pros Rich Harrington and Robbie Carman. The Lynda.com tutorial is applicable to all film and video creators, covering topics like shooting for multiple devices and cropping a 4:3 aspect ratio from a 16:9 HD image:
Aspect Ratio Calculators
Anamorphic Widescreen Ratio
Here are a few handy aspect ratio calculators that will assist you in determining the aspect ratio for common video formats or scaling an aspect ratio up or down (great for resizing video for web usage).
Digital Rebellion’s Aspect Ratio Calculator covers the aspect ratios of common film and video formats including Super16, 35mm, NTSC and PAL.
If you need to modify the height or width of your video image but you want to scale it commensurately with the aspect ratio, you’ll need to know the missing variable. For instance, if you change the height from 1920 to 1300, what should the width be to preserve the original aspect ratio? This calculator will quickly show you the missing variable so that you can ensure that the aspect ratio is maintained and the video doesn’t distort. Super useful! Josh deseno.
Lastly, the following image shows the most common film and video aspect ratios and how they compare to each other in size and proportions: