basilok Posted November 20, 2013 Report Share Posted November 20, 2013 Hi, we've been asked to do a projection on sphere shape from outside surface and speak frankly we have no clue how to do it!! i appreciate if someone can helps us. this is initial information we have: 1- the sphere diameter is 3 M 2- the projection distance from the sphere is open 3- we have 4 Christie projectors 20K S+with twist card available 4- lenses available 1.5-2:1 and 2.8-4.3:1 5- WO 5.51 what I am looking for: 1- what would be the projection size 2- How many projectors we need for this project 3- Projectors distance from the sphere according to the lenses we have 4- what would be the way to do the edge blending on the sphere surface 5-any other information or details we need to know!! thanks Basil 0 Quote Link to comment Share on other sites More sharing options...
Sergi Jover Posted November 20, 2013 Report Share Posted November 20, 2013 Hi Basil, I give you some tips with regards to each point: 1- the sphere diameter is 3 M 2- the projection distance from the sphere is open 3- we have 4 Christie projectors 20K S+with twist card available 4- lenses available 1.5-2:1 and 2.8-4.3:1 5- WO 5.51 Ok, take a look to the projection central site and use their calculator to consider the dimensions and distances for each lenses http://www.projectorcentral.com what I am looking for: 1- what would be the projection size You are subjected to the 3 meter spherical diameter, so keep in mind you have to fill up 3 meters in height for each projector, and then calculate (depending on the aspect ratio you're gonna use) the usable width in Watchout. 2- How many projectors we need for this project 4 is ok. 3- Projectors distance from the sphere according to the lenses we have Again, http://www.projectorcentral.com 4- what would be the way to do the edge blending on the sphere surface I cant't give you a link, but the Dataton guys I'm sure they have an already made example program. 5-any other information or details we need to know!! Take a look to the www.showsage.com site, they use to have a very nice links and examples. In fact, There's a hard work to do then with the media content and would be hard to explain, but maybe there are some examples on how to carry on this job. My best wishes. Sergi jover thanks Basil 0 Quote Link to comment Share on other sites More sharing options...
Adela Kriland Posted November 21, 2013 Report Share Posted November 21, 2013 Hi Basil, There is also a project by Dataton, to make a sphere that is explained, maybe they can share the link for you at the forum. You have to think that you will put your sphere inside a cube so you will cover as much as you can with 4 projectors, one for each side of the cube with out top and down. So you can to cover 3m height at least. Best regards Adela 0 Quote Link to comment Share on other sites More sharing options...
Jonas Dannert Posted November 21, 2013 Report Share Posted November 21, 2013 Hi, Adela is right, there is an old project (WO3) for a sphere setup, it's not ideal but it might help a bit. The ideal setup and positioning of the projector is dead center on the equator of the sphere, with 4 projectors. Preferably quite far from the sphere, the 2.8-4.3:1 lens is to be preferred here (see drawings in the project below). This means that you can take advantage of the mirroring horisontally & vertically-feature of the geometry adjustments in WATCHOUT, making the setup far easier. Please see P163 in the WATCHOUT 5.2 User Guide. Link: http://dataton.com/downloads/watchout/support/education/sphere/ /jonas 0 Quote Link to comment Share on other sites More sharing options...
TomT Posted November 21, 2013 Report Share Posted November 21, 2013 Hi, take a look at domeprojection.com : http://www.domeprojection.com/?page_id=101 0 Quote Link to comment Share on other sites More sharing options...
basilok Posted November 24, 2013 Author Report Share Posted November 24, 2013 Hi Jonas, thank you for the information, just a quick question, i saw in the project you shared that there is only three blending areas, what about the the last one where the 1st projectors join with the last one?! regards, Basil 0 Quote Link to comment Share on other sites More sharing options...
Jonas Dannert Posted November 24, 2013 Report Share Posted November 24, 2013 Hi Basil, As with any 360 degree projection, one adds a "dummy" Display on each side. The overlap here needs to be the same as inside the actually used screen area, to work properly. Hope this helps, /jonas 0 Quote Link to comment Share on other sites More sharing options...
Luxav Daniel Posted November 25, 2013 Report Share Posted November 25, 2013 Hi I think its easyer with 2 more Projektors, because of the Deep of the Focus. I would like to use the Twist and Blending via the Christies. (We use the M Serie, its easy with it) Also easy is the Color Balance and Blacklevel Setup inside the Projektors. Use the Christie Lens Calculator to find the better Lens. I think the short One is good, but it depends on the possible position of the Projektor (rigging points?) Greetings from Germany Daniel 0 Quote Link to comment Share on other sites More sharing options...
Jonas Dannert Posted November 25, 2013 Report Share Posted November 25, 2013 Daniel, I highly doubt more projectors than 4 will make things easier here. Depth of focus will work, I wouldn't worry about that. Also if you're to close to the sphere with the projector (ie wide-angle lens) you'll not cover as much of the top and bottom of the sphere as would from longer distance. But that's my 2 cents, /jonas 0 Quote Link to comment Share on other sites More sharing options...
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