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« More “super” chord charts for worship
Ask the Expert – unpacking strumming patterns »

What size screen do you need in worship?

By Kenny Lamm | April 17, 2012

Screen-1

I have been working with my home church in a video installation project. We have had a number of “experts” come to make proposals. I have been amazed at the seeming lack of understanding as to the needs of churches in video projection and the lack of knowledge of appropriate sizes of screens for a given space among A/V “professionals.” Hence, I have spent much time researching the issue to determine the ideal and minimum sizes of screens for use in worship.

Here’s the bottom line on the research, including my thoughts:

  • Go with a widescreen format (16:10 or 16:9). The industry is gradually abandoning 4:3 format. Going with 4:3 tends to give you something of a dated look to start with. If you already have that, don’t be in a hurry to go widescreen–it may not be worth the cost until you need to replace your projector(s).
  • If you intend to use your system to show more than just song lyrics, you should target a screen height of 1/6 to 1/10 the distance from the screen to the back row. In other words, if the distance from the screen to the back row is 60 feet (18 meters), then the screen height should be 6-10 feet (1.8-3 meters). The width is determined by the aspect ratio; so, if you use 16:10, you would have a screen minimally 9.6 x 6 feet (2.9 x 1.8 meters) or a maximum of 16 x 10 feet (4.8 x 3 meters). I should note that many sources felt 1/8 was a good size overall.
  • Aesthetically, the largest size may be difficult to pull off in upfitting an existing building. Sometimes, architectural limitations may require you to install screens smaller than ideal. Just realize the trade-offs up front. As you decrease the screen size below the 1/10 measure, you will find that text in video and other presentations may be too small to be readable and the details of a video may go unnoticed. Song lyrics can easily be made larger by adjusting the font size. PowerPoint or other presentation that you design can take these limitation into account during creation. You, unfortunately have no control of presentations and videos produced by people outside your church, and the smaller screen size may render some of these useless or less impacting.
  • Consider aesthetics. If you are upfitting an older, traditional worship space, be sure your vendor works with a carpenter that can help create ways to blend technology with the beauty of the traditional structure. You don’t have to have screens that seem like big zits on your front wall. Sometimes, this requires thinking outside the box. For instance, you may need to alter the moulding or structure around a baptistry to disguise screen housing that can be retracted at times you don’t want a screen to be visible. On the other hand, don’t accept a screen too small just because it seems the aesthetics dictate that–there may be more options than you have currently discovered. Keep at it!
  • Definitely plan to install a screen(s) in the rear of your worship space for the worship leaders to see. Be sure you take into consideration optimum sizes in this installation as well. In reality, upfitting existing spaces may be more difficult in this area, but push hard to come as close as possible to matching the size of your front screen(s). Realize that if you have to go smaller, that the worship leaders will have drawbacks as discussed above with undersized screens. For my church, one video consultant had specced out a rear screen about 1/4 the size of the front screen. That just will not do!
  • Don’t assume that the rep the video company sent you really knows about video needs in houses of worship. Do your homework and don’t accept their recommendations blindly.
  • Anyone have any tips to share concerning screen size selection?

Kenny Lamm, senior consultant for worship and music for the Baptist State Convention of North Carolina, is a frequent worship conference leader with a strong focus on equipping leaders in North Carolina (USA) and Southeast Asia. His blog, Renewing Worship, features posts that explore ways to renew–impart new life and vigor to–the worship in the local church.


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This entry was posted in Ask the expert, Tech stuff. Bookmark the permalink. Trackbacks are closed, but you can post a comment.
  • Jonah

    What about maximum size. We regularly show films under the CCLI licence and my IT man wants the largest possible size… to fill almost the whole wall!!! The church in its entirety is only 10 metres long (about 5m wide) … so we’re probably talking a 2.5m high, 4.5m wide screeen!! Is this too big… what are the consequences of this larger screen… we are projecting Blu-rays at 1280 resolution (though our current projector only upscales to HDMI)

  • http://www.dmmusic.com Ed Bentall

    Hi Jonah, cinema’s tend to use a 1:2 rule, whereas Kenny is suggesting a 1:8 rule for the church. 1:2 would be enormous in my opinion, but if you’re using it for films then so be it! The projector will be your most significant consideration. How bright is it? How bright is the room you are projecting in? If you think that the light that the projector produces on the screen is a bit like paint, then you need more paint to cover a larger screen, therefore, more brightness. If your screen is going to be 4.5m wide, then you’re going to need approx 15,000 lumens true HD projector to get a decent brightness and 1080p resolution, possibly even brighter if you have a very light church (there’s a reason why cinemas are dark!). These will have a list price of about £20,000. Alternatively you can use a dual projection solution, requiring custom bracketry but that’s going to require a 1:2 distribution amp to split the signal to each projector.

    Hope that helps!

    Ed B
    DM Music Project Manager
    (we spec the right size screens…!)

  • http://www.sflgroup.co.uk Tim H

    It’s also important to remember that the size of the screen will dictate the size of the projector you need.
    It sounds obvious, but so many people forget that the bigger the screen, the bigger the projector needs to be.

    Here’s the maths…

    For example, if you have a 10ft (3m) x 5.5ft screen (i.e. a 16:9 ratio, widescreen) then you have a surface area of 56sq-ft.
    In a venue where there is a lot of ambient light from windows or light fixtures then you should be aiming at 80Lumens per sq-ft.

    80L x 56sq-ft = 4,480L/sq-ft.
    I would be looking for a 4500-5000L projector therefore.

    In reality, a projector will only be capable of 75% image intensity after 25% of it’s lamp life (typically 250 hours). In which case you could argue that bumping the projector up another notch would counteract this effect somewhat. So I’m going to need a 6,000Lumen projector…

    Also, I need to make sure that the projector I purchase has the correct resolution for the job. If you want to do widescreen images, then you need to buy a widescreen projector. Also, if you are going widescreen, then all of your content will need to follow suit: powerpoint, song words, keynote presentations, etc.

    Once you start looking to a screen of 5m / 16ft or wider then you will struggle to find projectors big enough. A 5m screen will need at least a 10,000L projector. Given that the average 10k projector (with lens) costs at least £15,000 +VAT, I would suggest that it’s finances that will restrict things first.

    Certainly if you are looking even bigger than this then you will need to explore the idea of blending two projected images together. Although, this is a hugely expensive option!

    I do like Kenny’s suggestions for determining screen width, but I often find myself suggesting a smaller screen than is usually requested on the installation projects I work on.
    Is it not better to have a slightly smaller, yet vibrant image than a larger weaker one?
    Bigger is not always better…!

    A common misconception is that a more powerful projector is required over longer distances; this is not true. the greater the distance, the bigger the lens needs to be. On decent quality projectors you choose the correct lens when you buy the projector. This is all calculated by the width of the screen and the projection distance.

    If the projector is 3m away, and your screen is 3m wide, the lens ratio required is 1:1.
    As you increase the distance to 6m away, on a 3m screen, you need a 2:1 lens.
    12m away = 4:1 lens
    18m away = 6:1 lens
    And so on…

    I hope this helps!

    Tim Horton
    Project Manager
    SFL Group
    http://www.SFLgroup.co.uk

  • Kenny Lamm

    Hi Jonah,

    Ed has some great advice. I might add that the 1:6 – 1:10 rule is based on the seat farthest away, so your question brings up a great point–what size screen is too large. In my research, it would seem you need to look at the seat closest to the screen and determine the maximum screen size for that seat. Suggestions I have seen tend to agree that the maximum size should be between 1.5 and 2 times the width of the screen. So if your closest seat to the screen is 3m, then your maximum screen size should be 1.5-2m. The reasoning behind this is described here by John Stahlman from a Christianity Today article: “Looking straight forward, we can comfortably take in a horizontal field of view of about 30 degrees. Any field greater than 30 degree causes discomfort after a short time of viewing. This sets a limit for how close viewers should be to a screen. The minimum viewing distance from the screen is about twice its width because at that distance the screen fills 28 degrees of the vision field.”

    I would guess a 4.5m screen would be great for those sitting near the rear (10m) but overwhelming for those in the front rows.

  • http://www.edenfield-communications.co.uk Michael Jakins

    Hi

    One problem not thought about it seems when screens are installed is neck ache!

    It is frequently the case that screens are positoned so high in the apse of a church that certainly the front rows of the congregation are straining their necks to look up at the screen. As often the front row are children that could be a real “pain in the neck”!

    The bottom of the screen only needs to be high enough to ensure that those at the rear are not screened by folk further forward. Which may not be that high partiuclarly if the church floor has a rake.

    Before installing it is worth preparing some sight line diagrams to work out just how high everything needs to be.

    Regards

    Michael (off to see the physio for a neck massage after Sunday!)

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