Epson PowerLite 71c Epson Answers (Projectors) - Page 1
Epson PowerLite 71c Manual
![]() |
View all Epson PowerLite 71c manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 1 highlights
EPSON® Answers What is projector "throw distance" and how can I find out the throw distance of an Epson projector? To set up a projector properly requires an understanding of where to position the projector realtive to the screen. Putting the projector too far away makes the image too large and faint. Placing the projector too close to the screen makes the image toosmall. A projector's throw distance is a calculation that gives you the optimum distance for placing your projector. Did You Know? The basic rule is that light intensity decreases in inverse proportion to the square of the distance. 3 feet At a two-foot distance, light will be 1⁄4 the intensity and cover 4 times the area as the same beam of light at a one- 2 feet foot distance. 1/9 Distance 1 foot 1/4 1 Intensity Image Size 1X 4X 9X So how do you determine your optimal throw distance? Whether you are presenting in a classroom, conference room, training room, or auditorium, you will need to know one of these two things in order to correctly position the projector: Screen Size - Once you know your room size and layout, you will need to know the size of the screen. If the room you are presenting in has a built-in screen, measure the dimensions of the screen, including the diagonal (corner to corner). This will determine where to postion your projector to adequately fill the screen. If the room layout does not accommodate the throw distance you need, one alternative is to use a projector with a replaceable lens that will provide either a longer or shorter thow distance than the standard lens allows. Throw distance - If you know the throw distance you require (based on the room layout) and what the projector can handle, you can easily calculate the optimal screen size using the chart below. Basically, the longer your throw distance, the larger your screen size will be. EPSON PowerLite 51c/71c Screen size: Wide 36" 71" Tele 29" 58" Distance 4.2' 8.3' 105" 87" 12.5' 140" 116" 16.7' 175" 144" 20.8' 210" 173" 25' 279" 231" 33.33' 313" 260" 37.5' 348" 305" 41.7' See the complete collection of EPSON Answers and detailed Epson product information online in the EPSON Knoware University at http://knoware.epson.com Summer 2002 EPSON is a registered trademark of Seiko Epson Corporation. Other trademarks are the property of their respective owners.
![](/manual_guide/products/epson-powerlite-51c-epson-answers-projectors-06d4479/1.png)