Epson projection calculators - what's what

    When it comes to the main advantages of the projector in front of the TV, then it is certainly - much used to proc eed image at a lower cost than one inch diagonally. However, when it comes to choosing a projector, the buyer often falls into a stupor, not knowing which model to choose, and most importantly, what size of the screen can be obtained when using a particular model in a particular room.


    So that the buyer can quickly and easily deal with these issues, we suggest using one of our projection calculators to calculate the projection distance: http://epson.ru/catalog/calc/
    About them and tell you more in this post. (Under the cut are animated GIFs and about 1 Mb of traffic).

    What affects the final screen size?


    Before proceeding to the consideration of calculators, we will go over the most important parameters of the projector, which affect the installation and are used for calculations in calculators. There are only four of them. First of all, this is the projection ratio of the projector and  offset . The first determines the dependence of the distance to the screen on the image size:


    Offset indicates the vertical shift of the image (with a desktop installation - up, with a ceiling - down) - it is different for different projectors.
    If the projector did not have optical zoom, then to obtain the desired image size, you would need to position it at the only correct distance from the screen. In the presence of zoom, we already get some freedom - we can install the projector closer or further from the screen, preserving the image size, or, without moving the projector, get an image larger or smaller:


    In addition to the above, some projectors have a special “lens shift” function, which allows you to shift the image higher or lower or to the left or right due to the displacement of the optical system. This, firstly, cancels such a restriction as offset, and, secondly, the projector can be placed away from the center of the screen (for example, on a stand on the side of the viewer):


    That, in fact, is all! .. There are also parameters that are not taken into account in calculators, since they reduce the sharpness of the image to some extent. This is digital zoom and “digital keystone correction”, which allows you to place the projector at an angle to the screen and adjust the image shape so that it retains a rectangular shape. This feature is not taken into account in calculators - it is always assumed that you install the projector in the optimal way, placing it at right angles to the screen.



    Epson Projection Calculators


    Let's move on to Epson projection calculators: http://epson.ru/catalog/calc/

    We offer two solutions:

    • For choosing a home projector, with an interface designed for use even by inexperienced PC users
    • To select any projector offered by Epson. This calculator presents all the models of the company and more options are available for customization when choosing a projector.

    Home projector projector calculator


    This is the most visual and enjoyable to use online application. The calculator is designed not so much for an absolutely accurate calculation of the installation as to estimate what size of the screen can be obtained using the projector, depending on its basic settings.


    The choice of projectors is limited to a few models designed for use at home. It is possible to adjust the “optical zoom” of the projector and the height of the ceiling. In this calculator, the projector lens is initially in the most narrow-angle position. Therefore, if you are interested in the maximum image size that the projector can display at the required distance from the wall, the first thing you should do is zoom out to the maximum.

    To get a specific diagonal, just enter the required value in the field with the diagonal value and press Enter. If obtaining a similar diagonal with the current zoom value is possible, the projector will be moved to a distance from the wall at which it is possible to obtain the desired image diagonal.

    In this version of the calculator, the exact offset of the projector is not taken into account. But the “lens shift” function is very clearly illustrated (for those projectors that have one): we can freely move the projector around the room, not only closer or further from the screen, but also sideways - the position of the screen will not change!


    Another interesting “trick” of this calculator is that you can look at the cost of one inch of the diagonal and compare it with the cost of an inch of the diagonal of commercially available televisions: if the projector decreases the cost of an inch with an increase in the diagonal, then for televisions - on the contrary. To calculate the average market prices are taken for large-format TVs of various diagonals - from small to the maximum available on the market at the moment.



    Universal projection calculator


    Now consider the most fully functional calculator .
    This online application contains a database of all Epson projectors and provides additional features for more accurate projection distance calculation.


    To get started, select a projector from the list, after which you need to make sure that the “ image format ” parameter matches the resolution of the projector:

    • SVGA, XGA - 4: 3
    • WXGA - 16:10
    • 1080p - 16: 9
    • etc.

    Next, indicate the type of installation of the projector - “ Normal installation ” or “ ceiling mount
    Lens shift ” will display the area within which the image can be shifted if the projector supports this function.
    Actually, that’s all the settings! Now let's ask a specific question and get an answer. We are offered two options:

    1. Having indicated the size of the image , find out the range of distances from the screen in which we can place the projector (thanks to the "optical zoom")
    2. By specifying the distance to the screen , get the minimum and maximum image sizes.

    As for the vertical measurements, moving the projector up and down, we get the following data:

    • Distance from floor or ceiling to projector
    • The distance from the floor to the bottom of the screen
    • The distance from the ceiling to the top of the screen
    • Screen height


    The ceiling height can also be changed - it affects the distance from the floor to the bottom edge of the screen during ceiling installation and from the ceiling to the top of the screen - during normal installation.

    By the way, if you choose an ultra -short throw projector, such as the Epson EB-485W , then the appearance of the calculator will change dramatically.


    First of all, we are not offered to install these models in the desktop at all (although such an installation is supported).

    Since such projectors are installed on the wall mount supplied with the package, all calculations come from the mount called the “wall plate”.

    Projector selection is easy


    Using Epson projection calculators , you can independently choose the model that is suitable for solving your problems, whether it’s organizing a home theater, choosing a projector for an office or an interactive projector for use in the classroom or for organizing interactive meetings.


    Dear Khabravchians,
    Due to the fact that Habrahabr.ru has been divided into three resources (HabraHabr, GeekTimes and MegaMozg), the Epson company’s blog has moved to Geektimes.ru .
    Looking forward to seeing you on our GT blog!
    Epson Team

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