Community Theater Green Room Discussion Board: Image Gels

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Stagefool
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Joined: 10/27/09
Location: United States
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Topic: Image Gels
Posted: 12/17/09 at 5:47pm

We have a discussion on the use of gobo for window scenes. What would be the best lighting and gobo combination for projecting a scene on a black/blue scrim in a very short narrow area?
We have plenty of options for lighting instruments and the scene is a night city scape. The problem is the focus length from the instrument to the scrim!

I am looking forward to the responses!

Stagefool

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David McCall
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Posted: 12/17/09 at 8:04pm

I like the Rosco Image-Pro. You put this device into a S-4 or equal, and then you put in custom slides to project. Rosco will be happy to make slides for you, but I make my own.

For a window, you might place a "life size" cardboard stand-in for the window at the exact location you want the projected window to land. Then use the light you will be projecting with to light the stand-in window. You might draw the mullions on the stand-in as a guide later. To deal with the distortion, I take a picture from the point-of-view of the light. Try to line up the camera to the light as best you can.

Then take that image into Photoshop and fit the it into a life size template for the slide. You can now create a picture of your window matching the perspective of the projection.

I usually run the transparency through the printer ~3 times to improve the blacks.

David M

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Gaafa
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Posted: 12/18/09 at 7:49pm

you could also use a 'Fergo'

http://www.seleconlight.com/index.php?option=com_content&task=view&id=159&Itemid=211

Though you will need to hire in a 'Selicon Pacific' light to acomplish this.

Joe
Western Gondawandaland
turn right @ Perth.
Hear the light & see the sound.
Toi Toi Toi Chookas {{"chook [chicken] it is"}
May you always play
to a full house}

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Stagefool
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Posted: 12/19/09 at 8:35pm

I appreciate the information on the creation of the gel image. I think I must have not communicated that real problem is not the gel....not the lighting instrument...........but the very limited distance between the source and the scrim. Total of 3 ft!
I thought a S-4 was perfect also but the beam width may not suffice in relation to the very limited distance.
The set designer would be able to create a skyline scene....but I thought is would be less complicated and less expensive using a GOBO if the distance was not a huge problem. It may be !

Stagefool

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Gaafa
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Location: Australia
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Posted: 12/20/09 at 5:32pm

'av a go' at bouncing the image via a mirror [ which can increase the image by upto a 1:15 ratio} on to a cyc or cloth, upstage of the scrim.

Then the lantern can be focused from the 'X' or 'Z' position on or off stage, rather than using the S4 [profile]in the downstage 'Y' location & projecting onto the scrim, which restricts warm prop movements & wash usaged.

Joe
Western Gondawandaland
turn right @ Perth.
Hear the light & see the sound.
Toi Toi Toi Chookas {{"chook [chicken] it is"}
May you always play
to a full house}

IP Logged

David McCall
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Joined: 1/28/09
Location: United States
Online Status: Offline
Posts: 299

Posted: 12/21/09 at 2:08pm

There are new S-4 lens tubes that go out to 90 degrees, which is quite wide. However, with only 3' to work with I'd opt for the painted or cut-out skyline.

David M

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Gaafa
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Joined: 3/21/04
Location: Australia
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Posts: 1181

Posted: 12/23/09 at 12:25am

Gill this might be something to have a squint at;-http://www.lightbreak.com/
While it supposedly a new innovation? I remember mucking 'bout with simmilar breakup gobo's for fresnels, back in the 50's.

Joe
Western Gondawandaland
turn right @ Perth.
Hear the light & see the sound.
Toi Toi Toi Chookas {{"chook [chicken] it is"}
May you always play
to a full house}

IP Logged

Lights and Sound
Community Theater Green Room Discussion Board :Producing Theater :Lights and Sound

Author	Message
Stagefool Walk-On Joined: 10/27/09 Location: United States Online Status: Offline Posts: 0	Topic: Image Gels Posted: 12/17/09 at 5:47pm
	We have a discussion on the use of gobo for window scenes. What would be the best lighting and gobo combination for projecting a scene on a black/blue scrim in a very short narrow area? We have plenty of options for lighting instruments and the scene is a night city scape. The problem is the focus length from the instrument to the scrim! I am looking forward to the responses!
	Stagefool

	IP Logged

David McCall Celebrity Joined: 1/28/09 Location: United States Online Status: Offline Posts: 299	Posted: 12/17/09 at 8:04pm
	I like the Rosco Image-Pro. You put this device into a S-4 or equal, and then you put in custom slides to project. Rosco will be happy to make slides for you, but I make my own. For a window, you might place a "life size" cardboard stand-in for the window at the exact location you want the projected window to land. Then use the light you will be projecting with to light the stand-in window. You might draw the mullions on the stand-in as a guide later. To deal with the distortion, I take a picture from the point-of-view of the light. Try to line up the camera to the light as best you can. Then take that image into Photoshop and fit the it into a life size template for the slide. You can now create a picture of your window matching the perspective of the projection. I usually run the transparency through the printer ~3 times to improve the blacks.
	David M
	IP Logged

Gaafa Celebrity Joined: 3/21/04 Location: Australia Online Status: Offline Posts: 1181	Posted: 12/18/09 at 7:49pm
	you could also use a 'Fergo' http://www.seleconlight.com/index.php?option=com_content&task=view&id=159&Itemid=211 Though you will need to hire in a 'Selicon Pacific' light to acomplish this.
	Joe Western Gondawandaland turn right @ Perth. Hear the light & see the sound. Toi Toi Toi Chookas {{"chook [chicken] it is"} May you always play to a full house}
	IP Logged

Stagefool Walk-On Joined: 10/27/09 Location: United States Online Status: Offline Posts: 0	Posted: 12/19/09 at 8:35pm
	I appreciate the information on the creation of the gel image. I think I must have not communicated that real problem is not the gel....not the lighting instrument...........but the very limited distance between the source and the scrim. Total of 3 ft! I thought a S-4 was perfect also but the beam width may not suffice in relation to the very limited distance. The set designer would be able to create a skyline scene....but I thought is would be less complicated and less expensive using a GOBO if the distance was not a huge problem. It may be !
	Stagefool
	IP Logged

Gaafa Celebrity Joined: 3/21/04 Location: Australia Online Status: Offline Posts: 1181	Posted: 12/20/09 at 5:32pm
	'av a go' at bouncing the image via a mirror [ which can increase the image by upto a 1:15 ratio} on to a cyc or cloth, upstage of the scrim. Then the lantern can be focused from the 'X' or 'Z' position on or off stage, rather than using the S4 [profile]in the downstage 'Y' location & projecting onto the scrim, which restricts warm prop movements & wash usaged.
	Joe Western Gondawandaland turn right @ Perth. Hear the light & see the sound. Toi Toi Toi Chookas {{"chook [chicken] it is"} May you always play to a full house}
	IP Logged

David McCall Celebrity Joined: 1/28/09 Location: United States Online Status: Offline Posts: 299	Posted: 12/21/09 at 2:08pm
	There are new S-4 lens tubes that go out to 90 degrees, which is quite wide. However, with only 3' to work with I'd opt for the painted or cut-out skyline.
	David M
	IP Logged

Gaafa Celebrity Joined: 3/21/04 Location: Australia Online Status: Offline Posts: 1181	Posted: 12/23/09 at 12:25am
	Gill this might be something to have a squint at;-http://www.lightbreak.com/ While it supposedly a new innovation? I remember mucking 'bout with simmilar breakup gobo's for fresnels, back in the 50's.
	Joe Western Gondawandaland turn right @ Perth. Hear the light & see the sound. Toi Toi Toi Chookas {{"chook [chicken] it is"} May you always play to a full house}
	IP Logged

Topic: Image Gels( Topic Closed)