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<div>Hello from a digest lurker projectionist.</div>
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<div>Agreed, video black is darker with projectors that have a higher contrast ratio. You can gain what is essentially the same thing as a dynamic contrast by putting the projector into the "economy" mode for the lamp, which will cut down your brightness. On the larger staging projectors, there will often be an internal iris and power setting that can help adjust for this. But that doesn't really help any more than knowing that if you have an LCD you will have worse contrast than with the DLP (I could bore you all with a long diatribe about the various technologies and their strengths and weaknesses) since you already have the projector.</div>
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<div>Adding physical masking should not hurt your lens, barring physical contact which could scratch it. I put Wybron Eclipse dousers in front of 22k projectors and have no ill effect on the lens. I use them to completely block the video when not using the projectors and will partially close them to feather the video black edges when the majority of the image is masked. So, that might be another possibility, instead of making a hard line cut with your black wrap, make a sawtooth cut. It will make it more difficult for the audience to see that hard video black edge.</div>
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<div>Davin</div>
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Date: Sat, 07 Feb 2015 11:01:14 -0800<br/>
From: Bryan Manternach <a href="smashwolf@gmail.com" target="_parent">smashwolf@gmail.com</a><br/>
Subject: Re: [SML] [CudaMailTagged] Re: Masking Projector Black<br/>
Message-ID: <a href="712078C9-F43A-415F-B1AB-104271799D98@smashwolf.com" target="_parent">712078C9-F43A-415F-B1AB-104271799D98@smashwolf.com</a><br/>
<br/>
Higher contrast ratio projectors usually work well with a software mask. But the technology to get a true black is often expensive and not achievable from a small portable projector. For instance my Sony LCOS Projector makes a way blacker black than my Sony LCD. And a 3 Chip DLP usually does a good black because there is no color wheel to leak light etc...<br/>
<br/>
On February 7, 2015 10:18:27 AM PST, Jerry Durand via Stagecraft <stagecraft@theatrical.net> wrote:<br/>
>What? Somebody flash the Jerry sign?<br/>
><br/>
>DMX shutters aren't be hard, but that cuts off the entire image. If<br/>
>you're trying to trim the video black border, then that requires a<br/>
>gobo. Haven't seen a lot of projectors with gobo slots, but it<br/>
>wouldn't<br/>
>be a bad idea for a pro unit to have one.<br/>
><br/>
<br/>
>>> I'm curious what can go wrong when trying to mask portions of<br/>
>a<br/>
>>> projector field with black wrap. I am planning to dowse the<br/>
>projector, but<br/>
>>> do to its intended use, and necessitated position, large portions of<br/>
>the<br/>
>>> field will never get used.<br/>
>> ____________________________________________________________<br/>
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><br/>
>--<br/>
>Jerry Durand, Durand Interstellar, Inc. <a href="http://www.interstellar.com" target="_blank">www.interstellar.com</a><br/>
>tel: +1 408 356-3886, USA toll free: 1 866 356-3886<br/>
>Skype: jerrydurand<br/>
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