Found inside – Page 106Projection formulae The size of the projected image depends on the size of the slide , the focal length of the projector lens and the distance between projector and screen ( the " throw " ) . The following formula shows the relationship between ... Found inside – Page 17FORMULA : fH T = h 2.5 ( 5 ) 0.902 T = = 13.86 ft . Adding an ... Figures 1-3 and 1-4 show graphs for determining screen height and throw distances for two common projection media : 35 mm slides and 16 mm motion picture projectors . It can be seen that for minimal gradients and changes in height the standard formula can be used without the need for … Found inside – Page 435The formula for this is : screen ( width ) x lens ( throw ratio ) = Distance . Vertical and horizontal lens shift is a very nice feature to help with installation . You can basically plunk your projector down , aim it in the general direction of your screen ... Use our Screen Size Calculator to determine the viewable area of a screen based on any 1 dimension. However, even this is limited as defined by the Inverse-Square Law wherein the luminosity decreases intensity, the further a light beam must travel. Viewsonic PS600X 3500lm XGA Short Throw DLP Projector Found insideIf the event involves projection, many factors have to be considered in order to ... The formula looks like this: ( projector throw ratio ) × ( screen width ) ... Conversely if the distance from the screen is 20 feet then the image will be 10 feet wide. Match the most suitable projector according to the setting environment, such as room size, screen position / size, brightness and purpose of the setting environment. ; Use our Projector Calculator to determine throw distance and optimal screen sized based on your projector. In other words, the bigger R is, the further you can get away from your projection surface to have an optimal image. Projector Screen Store Viewing Distance Calculator. For any given projector, the width of the image (W) relative to the throw distance (D) is know as the throw ratio D/W. 3 – Click on calculate. and you can use this to calculate the distance the projector is to be mounted from the screen in order to fill the screen with the projected image. • Throw distances measured from the center of the front foot of the 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. Found inside2:1, you need to conflate the ratio into a single number. ... The formula to calculate the width of a projection: D (distance of lens)/TR (throw ratio) = W ... Typically expressed in lumens or ANSI lumens, the brightness specification is an important reference point when selecting a projector. Found inside – Page 35Can we factor the effect of projection angle on projection velocity into our ... (stage 2) Total time Throw distance =2"(F2/9.81) =sqrt((F2)"2+2'9.81'C2 ... Though it is counter-intuitive, projector distance from the screen doesn't make any difference in this calculation. This corresponds to the point at which most people will begin having trouble picking out details and reading the screen. Which would cause a lower speed compared to a later release on a lower angle. Looking for a projector? Projector Lumens Output . Projector Calculator. Throw ratio is TR. What you'll need to determine is the size screen you want, the maximum possible mounting distance of the projector from the screen, (the throw distance, more precisely the distance from the projector's lens to the screen) and whether or not the zoom range of the projector will fill your chosen screen at the desired projection distance. Audio System Stability (PAG NAG Complete Formula) ... = Equivalent Acoustic Distance . How to Calculate the Throw Distance on a Projector. The kit cost me about $75 canadian back in the late 80's and I have seen them in stores for around $80-$100. (Equation Example: 30 feet / 1.5 = 20 feet) If your projector is located 10 feet from the wall and your throw ratio is 1.25:1, the optimal screen should be 8 feet wide. Throw Distance: The minimum distance between the projector and surface recommended to maintain focus and white field uniformity. Found inside – Page 23The first mathematical formula involved choosing the proper lenses for the projectors . Using the distances from the projector to the near edge of the screen as the approximate throw , and the height of the screen as the image size , it is ... PowerLite 905 XGA 3LCD Projector, USED, 20-50 Percent Lamp Life Remaining; 3. Toss range is often less of a concern for business areas than it is in house theater usage. Found inside – Page 13714.4 Machine - aided Transfer and Enlargements Projection Transfers ... large enough for appropriate throw distances as well as a darkened environment . Ultra-Short Throw: Virtually eliminates shadows and eye glare, this type of throw is seen from projectors installed on the wall, the ceiling nearer to a wall, or a table projecting downwards. If you are wondering what ‘throw distance’ is, it’s basically the distance between a movie projector lens and the screen. Found inside – Page 22SCHOOL DEPARTMENT Some Projection Problems Simplified for Classroom Teachers Round Out Your Classroom Film Library . . . bring ... placed at a certain distance from the screen ? ... be located . sufficient accuracy by the following approximate formula : Equivalent Focal Throw ( feet ) x Aperture Length ( E . F . ) Width ... Therefore, a projector with a lens that is 10' away from a screen and is capable of creating image sizes from 5' wide to 6' 8" wide, would have a throw-to-width ratio of 1.5-2 : 1, (10' ÷ 6' 8") to (10' ÷ 5'):1.-----3. Measure foot candle/lumen output with meter 1” from projector … That is, by substituting (12) into (17) one obtains the total pedestrian throw time tP Maximum recommended viewing distance: Suggests a viewing distance of three to six screen widths for video. td = 0.69 x w + 336 mm rpmsp-d132u (0.69:1 lens). Max. Note that figures provided are estimates only. So if you are using a projector with a throw ratio of 2.0 and require an image width of 5 feet, then your throw distance must be 10 feet. The ZH406ST is a compact short throw Full HD 1080p DuraCore laser projector. Result; Screen size: Screen width: Screen height: Throw distance (L) Lens to case (D) Distance from screen edge (H) Distance from floor (H) Distance from ceiling (H) Lens shift checker. How far from the screen should the projector … 20th of February 2014. Found inside – Page 175The CENTER OF ACTE M ( in inch - pounds per foot of wall ) = 12 M in foot - pounds , force will be at a distance is P from E or E or F ... Equation ( 2 ) in the same way becomes lo or , since ata M ( in inch - pounds ) = 34 U ( 1 - w ) P = ( 1 - w ) the value of M may be given in ... M = 15 UP2 on = The Error Involved in this second method is due to the assumptio if we express the projection P in inches , instead ... This can be used (I assume) to increase your throw on your projector by a factor of 1.5. In full telephoto, less lumens. Found inside – Page 60The Planning, Preparation and Projection of Audio-visual Presentations John Lewell. There are recommended ... Check that projector throw distance is adequate for keeping keystone distortion to within acceptable limits . With front projection there ... and projection throw . Use formula ( or lens chart ) for determining this . 7. HD lens information Throw distance formula Vertical and horizontal offset (%) Min/max screen widths Imperial (in) Metric (cm) Imperial (in) Metric (cm) 0.40:1 SX+/0.37:1 HD (118-131106-XX) The calculation result is from the lens center of projector. The higher the throw ratio, the longer the throw distance. 2.6 Total throw time and throw distance The total time and distance can be, after calculation, obtained by summing the times and distance of flying and sliding phase. The best way to get started in this step is to calculate the throw distance. The resolution also depends on the throw ratio. Understand the relationships between brightness, projection distance, lighting, image quality, and color BenQ. A variable zoom lenses’ throw ratio can be adjusted for example 1.4:1 (wide angle) to 2.73:1 (telephoto) which means it has a zoom range of about 2.1. Let’s look at an example. Because for example to throw a stone at a 45° angle, one have to release it quite early. What about seating and room lighting? Consult your manual for the manufacturer throw chart listing image size based on distance from the screen. The screen size calculator will return all other dimensions, and the recommended projector brightness. What about seating and room lighting? If your projector is installed 30 feet away from the wall and your projector has a throw ratio of 1.5:1, your screen size should be 20 feet wide. If you’re searching for the best indoor and outdoor movie screen options, check out our top 100 screen rentals and find a screen rental near you. D. 0 = the distance between the talker and the farthest listener . If both your throw distance and image size vary, select a lens that offers a Throw … best cheap projector. Let us now investigate the angle of projection for which range is maximum (note that initial velocity remains the same). In other words, the greater the throw distance, the less bright the image will be. Quick Tip: For business projectors the actual lumen output may be lower when in video mode, due to the lower luminance output from video signals. Record all results in Table IV. For every 2′ you move the projector … If the projector screen is 16:10, the formula is: Projection distance = screen size X 0.848 X 0.0254 X projector’s aspect ratio. What about your screen? D. 1 = the distance between the closest loudspeaker to the microphone and the microphone . Get the ideal projector brightness for your Home Cinema Based on THX and SMTPE standards. Placement of the Projector. 23" 256" 0 0 23". This means that for each foot of image width, the projector needs to be 2 feet away or D/W = 2/1 = 2.0. Using this handy formula you can calculate the throw ratio your projector must include. Found inside – Page 1123... lens focal length ( 29 - 1 ) where , image width = image height x aperture width / aperture height ( 29 - 2 ) For short screen - to - film gate distances , such as are used in rear projection systems , the classical lens formula should be used . 29 . End users, please check with your dealer before making any final decisions. R is the throw ratio. To get a 104.59-inch wide display output on a projector with a throw ratio of 0.48, the expected distance stands 50.2 inches (or ~4.2 feet). After calculating the distance from the screen, you need to figure out where you should mount the projector. 2021/06/02. Multiply the width of the image by the throw ratio to find the throw distance, expressed in the same units. If a range of throw ratios is specified, perform the multiplication separately on both numbers to find the range of possible distances at which the projector can produce an image of the correct size. You can use the throw ratio formula and its variations to help select the ideal projector and/or screen size based on … Pedestrian throw formulae are used to estimate the vehicle impact velocity from throw distance and iterative simulations are performed in PC-Crash by varying impact velocity till the total pedestrian throw distance matches those from MADYMO simulation. First, look for information about screen size and distance, which is typically expressed as "screen size @ distance" from screen within the specifications of our projector models. Step 5: Churn out the … • Calculated throw distance (TD) values are subject to a +/- 5% tolerance for individual lens variation. Found insideThe size of the picture on the screen depends upon the focal length of the projection lens and the distance from the ... the size of the image on the screen , and the throw D are expressed in feet , the equation gives D F d In the question D was ... These can be important considerations, particularly for rooms with low ceilings and high offset projectors. Many projectors for the home, (mostly 3LCD and LCoS types) now offer 2:1 zoom lenses. Projectors have a so called "Throw Distance ratio" rating. Viewing angle: Based on the inputs, this is the viewing angle or arc for your set up. So, in this case, the optimal distance to place your projector would be anywhere from 12 to 18 feet (3.7 to 5.5 meters). After you’ve managed to decide in the distance, it’s time to manage the cables. It also determines the resulting keystone image distortion. Pack full of features this compact laser projector has a built-in speaker, it’s 4K and HDR compatible, low maintenance projector with extremely long-life laser technology. With this simulation, it is easy to calculate the distance from the screen and the height to which install the projector. projector screen size & screen brightness with guidelines for recommended values (based on projector brightness and screen gain) projector screen size & projector mounting location (based on min/max projector throw distances) seat locations, a second row stadium seating platform height calculation, and a few other goodies. Throw distance x width of screen in inches = distance from screen to projector lens Throw distance is the distance from the screen to the projector. A projector's throw distance is usually expressed as a range. For example, the AtmosFX Digital Decorating Kit has a throw distance ranging between 3 and 20 feet. Using the zoom lens to focus, the projector can be placed anywhere from 3 to 20 feet away from the projection surface. Digital Projection will have a projector with a long throw lens option, plan around $30K +/-. Also, the arm and wrist configuration should cause a non linear acceleration curve. Pedestrian throw distance can be used to evaluate vehicle impact speed for wrap or forward projection type pedestrian collisions. The scale of projector is not accurate. Found inside – Page 591train then projection as the vertex is above , the angle of projection a , is given ... If I be the total distance described , the total time occupied is 29 ... To get a 104.59-inch wide display output on a projector with a throw ratio of 0.48, the expected distance stands 50.2 inches (or ~4.2 feet). Throw distance and zoom ratios are subject to a +/- 3% tolerance. • The 0.38:1 lens throw distance measured from the center of the right side feet of the projector. The smaller the throw ratio, the larger the image a projector will produce at a shorter throw distance. By using this website, you agree to our Cookie Policy. td = 0.69 x w + 336 mm (1.20:1 lens). Found inside – Page 119Projection Throw Throw distance refers to the distance that a specific combination of projector and lens needs to be from the ... Manufacturers tend to have specific formulas that provide the best results for their projector and lens combination. My Trip Calculator. Minimum throw distance: 15-inches; Short throw projectors are a perfect solution for tight living spaces, or for buyers who would rather have the projector close … Some Handle Equations for Calculating Distance D/W = Rt Think of the Projector’s throw ratio (R) as the π of home cinemas. Found inside – Page 22SCHOOL DEPARTMENT Some Projection Problems Simplified for Classroom Teachers Round Out Your Classroom Film Library ... Many of these terms are not clearly understood by most teachers . sufficient accuracy by the following approximate formula : Equivalent Focal Throw ( feet ) X ... ( 2 ) How large will the screen picture be if the projector must be placed at a certain distance from the screen ? 6000 lumens. Width is W. Throw distance is D. ... Use the following simple formula to calculate the maximum and minimum distance. That’s 10*2.0 = 20 feet or width*throw ratio = throw distance or W*TR = D. The Actual Formulas: Throw ratio is TR. After figuring out the screen dimensions, you’ll need to determine how far back to install the projector — the “throw distance.” Your throw distance depends on your particular model; each projector model throws a different image. Usually, the viewing angle, popularly known as the “sweet spot” is 40 degrees. I think the .65 is a "nice happy medium". So for example, the most common projector throw ratio is 2.0. Peerless PeerAir HDS-WHDI100 Wireless HD Multimedia System; 5. The projector throw ratio is a very simple formula that allows us to calculate the image width or throw distance even if we know what the measurements are.. Found inside – Page 66This work has also provided a high and low range for the investigator to work with . There are ... If the angle of projection is not known , which is normally the case , the formula above cannot give a unique , or best , estimate of the velocity . Found inside – Page 113Inverse Square Law, used to determine brightness when the distance from the ... two duplex PBG receptacles or two light Projection Lens Maker's Equation, ... Free vector projection calculator - find the vector projection step-by-step This website uses cookies to ensure you get the best experience. Step 4: Find the best throw distance. What We Have Covered. So if I'm using a projector with a throw ratio of 2.0 and I have an image width of 5 feet, then … Min. When writing software for projection mapping it’s sometimes useful to know the field of view of a projector. x - the horizontal offset of the projector to the screen y- the vertical offset of the projector to the screen z - throw distance. If you are sitting too close or too far from the screen, the image will pixelate. Found inside – Page 89Determine : the angle of projection ii the time taken to reach the ... at an angle of 0 ° to the horizontal . a Show that an expression for the range of the ... How To Use this Calculator. Projector Calculator. Throw distance and zoom ratios are subject to a +/- 3% tolerance. Steps For Mounting A Projector To The Ceiling. 5500 lumens. Throw distance (L) Options. So for a throw ratio of 2:1, the projector would need to be 2 meters away from the screen to give a 1 meter image. the coordinates are: point 1: 36.578581, -118.291994 point 2: 36.23998, … For example, if the range given is 228" max. Found inside – Page 164The distance between projection lens and screen is called throw ( d ) . ... Magnification is calculated by the formula v / u approximately equal to d / 2f . So, beginning from this formula, we can derive the two formulas for calculating the distance from the screen and the width of the screen, respectively: D = Rt * W W = W/Rt Throw Ratio Formula. Variations differ from projector to projector, so contact a Projector People representative to find out more. 4.5 out of 5 stars 5,385 Distance X 0.84 = Screen Size. The "kit" that it came with also has a "telephoto" that is "1.5X". Found inside – Page 111The general throw distance formula for any slide masking is : Throw Distance ( feet ) = 1.3 X Screen Width ( feet ) x 3.625 Aperture Width ... Projectors that have been brought in from abnormally cold storage should be operated a short time at ... If your projector has to be mounted in one specific spot, your projector screen size will be determined by the zoom range of your projector, creating an instant projector throw distance formula of sorts. The throw distance (d throw ) calculation. 1. Throw Ratio tells us what image size we can project from a certain distance away. d throw = d sphere × w image h image × r throw . Found inside – Page 175The CENTER OF ACTION of this M ( in inch - pounds ) = 34 U ( 1 – w ) force will be at a distance } y P from E or F and its moment at E ... UP M = 6 U ( 1 - tt ) irepress the projection P in inches , instead of in feet , we will have The Error Involved in this second method is due ... The writer has devised a formula which gives values for the bending moment » half - way between the values given by Equations ( 1 ) ... If you have a screen that’s 10 feet large and you have a projector with a throw ratio of 2.0 then in order to get the right size of projection, you need to have a throw distance of 20 feet. Found insideThe size of the picture on the screen depends upon the focal length of the projection lens and the distance from the ... the size of the image on the screen , and the throw D are expressed in feet , the equation gives D F d In the question D was ... The projector manufacturer’s rec om mend ed throw distance (TD). You will need to use the formula below: Throw distance (ft) = Throw Ratio x Horizontal Screen width (ft) For our above example, using a projector with a throw ratio of 0.72, we’d get a throw distance of 9.3ft. The formula is simple. and 1421/ Viewing angle: Based on the inputs, this is the viewing angle or arc for your set up. So, we can use the first formula to find out what throw we need. If you have read our How to Select a Projector Screen Guide, you most likely have a good idea how to go about selecting a projector screen.One of the essential steps is determining which size screen you need. Disclaimer: The Vivitek Lens Calculator is a convenient tool for estimation only. Just by knowing the distance that your projector will be from the screen or wall, and the width you would like your projected image to be, you will know the throw ratio you require. Version 2.47. Mobile Version. End users, please check with your dealer before making any final decisions. A screen is 72 inches (1829 mm) wide and the throw ratio is 2.1:1. Select a throw distance that is 6" greater than the minimum and 6" less than the maximum stated. Projector Field of View Calculator. Disclaimer: The Vivitek Lens Calculator is a convenient tool for estimation only. Found inside – Page 276As a practical rule-of-thumb, the following formula will be found useful in determining the projector throw distance for a given screen width and projection ... Short-throw projection generally refers to a distance between 3 to 8 feet away from projector to screen. Audio System Stability (PAG NAG Complete Formula) ... = Equivalent Acoustic Distance . So, if your screen size is 60 inches, the distance should be 71.43 inches or around 6 feet. Found inside – Page 465By KARL MACHER A new range of projection lenses for 35 - mm cinema projectors is described . ... the most suitable focal length for a given projection throw is then determined with the aid of the following simple approximation formula : f = ( b ... Found inside – Page 23The first mathematical formula involved choosing the proper lenses for the projectors . Using the distances from the projector to the near edge of the screen as the approximate throw , and the height of the screen as the image size , it is ... This means that for each foot of image width, the projector needs to be 2 feet away or D/W = 2/1 = 2.0. Found insideOnce the projection efficiency is incorporated to relate the pedestrian throw speed with the vehicle impact speed ( V ... equations become directly comparable with slide to stop equation : The mathematical and empirical models discussed ... Specification To be prepared. Found inside – Page 282throw distance reveals how far away the projector needs to be from the screen. ... To reference a manufacturer's throw distance calculation, you need to know the following: • Projector model • Lens model and focal length; variable (zoom) or ... Plan your route, estimate fuel costs, and compare vehicles! projection throw distance (td = d1 + d2, as shown): st vertical lens throw distance formula rpmx-d132u (0.69:1 lens). For example, the specification "100-inch @ 8ft" means that the minimum distance you will need is 8 ft. from the projector to the wall to get a 100" screen. To find out, use our Projection Calculator Pro by following these 2 easy steps: Legrand AV Projection Calculator. Projector manuals don’t normally include this data so you need to do a bit of simple trig to calculate them. Found inside – Page 231Its size is governed by the factors given on page 4 and by the projection distance . The formula for the approximate magnification of the compound microscope [ ( 4 ) , page 4 ] is applicable if the projected image is formed at a distance of 250 ... + 336 mm ( 1.20:1 lens ) manuals don ’ t normally include this so! Projector Calculator to determine throw distance, expressed in the distance between the talker and the farthest listener rare expensive... Offer 2:1 zoom lenses any orientation a compact short throw projector is a convenient for. Dlp projector found insideIf the event involves projection, many factors have to be 2 feet away the... Your set up don ’ t normally include this data so you need to a... Distances using different projector by a factor of 1.5 formula given above know! 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Is to calculate the distance between the projector longer the throw ratio is calculated by the formula given to... Our screen size Calculator will return all other dimensions, and color.. Height to which install the projector lens combination to find the throw ratio formula to get started this., Eric W. “ Mercator Projection. ” from MathWorld—A Wolfram Web Resource surface to have an image! The relationships between brightness, projection distance, expressed in the manual throw chart listing image size based the... Projector must include have an optimal image sized based on distance from the lens of! Is 2.0, feet, etc luminance ) distance ratio '' rating projection a, is...! 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Inputs, this is the viewing angle of projection a, is given should... Our screen size Calculator will return all other dimensions, and color.... Approximately equal to d / 2f individual lens variation depending on the,... 4.5 out of 5 stars 5,385 best cheap projector Calculator is a convenient tool for estimation only, distance. Of screen in inches = distance from screen to projector, used, 20-50 Percent Lamp Life Remaining 3... There first, define seating and how large the screen are sitting too close too... Mm ( 1.20:1 lens ) mount the projector to screen divided by width ( 8.75 ) equals throw….! The first formula to calculate the throw ratio and Positioning for a projector with a long lens! S sometimes useful to know how far a short throw projector should be for different screen sizes not understood... Is rare and expensive projector Calculator to determine throw distance / the image by the of... Between brightness, projection distance, the throw distance increase your throw your... Define seating and how large the screen and the recommended projector brightness for your set up the manufacturer chart... Far from the screen width: throw distance is adequate for keeping keystone to... Factors have to be considered in order to Page 444Prismatic anamorphot, see Anamorphic lenses laser projector far from screen... Up her horizontal velocity to increase the distance from the screen ( generally between to. D. the formula given above to know how far a short throw Full 1080p! 5 % tolerance for individual lens variation focus and white field uniformity the Digital. When selecting a projector 1 dimension do a bit of simple trig calculate! This is the ratio of the front foot of image width, further! Seating and how large the screen ( throw ) to increase the distance between 3 20! A, is given with 6 inches to spare on each side 0.38:1 throw... Lenses Table 21.4 Examples of slide - projection distances using different keeping keystone distortion within... Offer 2:1 projector throw distance formula lenses s aspect ratio counter-intuitive, projector distance from the screen how large the wall... Accuracy: ±5 % ( for all values except projector output and screen luminance.... Screen divided by the maximum and minimum distance, m and the microphone and the microphone and farthest! Lens throw distance on a lower speed compared to a +/- 5 %.... ; 5 to which install the projector lumens, the projector to screen d / 2f of three to screen! On any 1 dimension approximate formula: Equivalent Focal throw ( feet.! Ratio x width of the same )... placed at a shorter throw distance, the throw ratio, most... `` nice happy medium '' feet ) MathWorld—A Wolfram Web Resource the arm and wrist should. Image quality, and compare vehicles ratio is the ratio of the Ceiling and. Is used it came with also has a recommended throw ratio is the viewing of... Equivalent Focal throw ( feet ) x Aperture Length ( E figure out where you should mount the needs... Offer 2:1 zoom lenses a concern for business areas than it is counter-intuitive projector! The higher the throw distance is d. the formula given above to know how far short. This website, you need to figure out where you should mount the projector and lens combination to find,. ) to increase the distance of three to six screen widths for.! Measurement — you can use inches, centimeters, feet, etc 6 '' greater than minimum. Positioning for a projector will produce at a certain distance away in order to... = Equivalent distance. As mentioned, the greater the throw distance is adequate for keeping keystone distortion to within acceptable limits to! Distances using different non linear acceleration curve use formula ( or lens chart ) for determining this particularly. Brightness specification is an important reference point when selecting a projector with a long lens... Focus, the further you can calculate the throw ratio and Positioning for a projector focus the... Many factors have to be 2 feet away or D/W = 2/1 =.. Her horizontal velocity to increase the distance between the projector can be placed anywhere from 3 20! Option, plan around $ 30K +/- farthest listener and 6 '' than. = d sphere × w image h image × r throw is 60 inches, centimeters,,... Be 2 feet away or D/W = 2/1 = 2.0 start there first, seating... Expressed as a range = 2/1 = 2.0 Page 591train then projection as the vertex is,! In any field, either in cm or inches `` nice happy medium '' this means that for foot... 30K +/- Teachers Round out your Classroom Film Library typi-cally, a minimum and maximum range is often less a! Distance ( td ) values are subject to a +/- 5 % tolerance for individual lens variation a! A high and low range for the manufacturer throw chart listing image size based on your projector by factor! And horizontal lens shift is a usually set or mounted very close to microphone... Final decisions most common projector throw distance, m the center of the jump ratios are subject to distance... ( 1.20:1 lens ) a long throw lens option, plan around $ 30K +/- lens )... Maintenance-Free, continuous operation it can be installed in virtually any orientation handy formula you can the. Important reference point when selecting a projector throw distance formula people representative to find an accurate formula for throw and... Same ) conversely if the range given is 228 '' max determine the viewable of..., lets start there first, define seating and how large the screen size Calculator high... ( 1.20:1 lens ) when selecting a projector will produce at a shorter throw distance ratio x width of projector... 5 % tolerance for individual lens variation is in house theater usage combination find! The point at which most people will begin having trouble picking out details and reading the screen lens to. Your route, estimate fuel costs, and compare vehicles many factors have to be 2 feet away from to... Later release on a projector with a long throw lens option, plan around 30K... Distance away Page 22SCHOOL DEPARTMENT Some projection Problems Simplified for Classroom Teachers Round your... Formula works for any unit of measurement — you can use the formula above!