DanSteely Posted July 14, 2013 Share Posted July 14, 2013 Hi All, Our next big production for Feb 14 is WWRY and a 'Laser Cage' is required and I'm considering the best way of producing it. Limited funds are available for the but of course I need to make it stretch as far as possible on all the technical aspects of the show.. Reading some threads of the past on the subject I'm erring towards a profile with a 'laser' gobo. My available fixtures for this are: Selecon Zoom Profile 650W (non Axial) CCT Silhouette 1000W (a gobo holder would be required - can anyone tell me what size?) The throw distance for this from the grid above the stage is 4M. Or possibly a sub £100 laser. BTW. Our hazer is a DF50. On the subject of lasers, I'd love to project from the back of the auditorium (Sch. Hall 40m in length) above the heads of the audience and hit a mirror in the grid that then projects the cone of beams. What kind of laser is used for this kind of throw and effect? I would guess this is way out of my budget but I'm still interested in the technology) If I was to go the gobo route, which gobo would do the job (I'm thinking a circle of dots) Any thoughts and suggestions would be most welcome. BTW: Hope everyone's enjoying the stonking weather... Dan Link to comment Share on other sites More sharing options...
boatman Posted July 14, 2013 Share Posted July 14, 2013 A Strand Prelude, a home-made gobo and a mirror recycled from the local charity shop were used . Spool through to 3:35. It was much more effective on the evenings when the stage crew remembered to switch on the hazer. Link to comment Share on other sites More sharing options...
Brian Posted July 14, 2013 Share Posted July 14, 2013 The throw distance for this from the grid above the stage is 4M. Time for you to do a drawing and some trigonometry. But to get you started... You won't get a 'cage' if you only use a single unit, more a 'cone'. Let's assume you need it about 2m diameter at shoulder height (1.5m) so that the actor has a bit of space to move. So that's 2m diameter with a 2.5m throw. Which means you need a unit with a 45 degree lens in it. Now over to you. Look up what beam angles the units you've got have and work out if they will give the effect you want at that throw distance. Link to comment Share on other sites More sharing options...
jonathanhill Posted July 14, 2013 Share Posted July 14, 2013 A Sil will need a GH01 gobo holder, and you will need an A size gobo. An Acclaim zoom takes an M size gobo. Link to comment Share on other sites More sharing options...
DanSteely Posted July 14, 2013 Author Share Posted July 14, 2013 Hi Guys and thanks for the quick responses. I shall do some measurements and report back on angles and throws. Thanks Jonathan for the gobo holder sizes.. From your experiences, which of these two fixtures will give us more output? (assuming similar beam angles/throws) Thanks again.. Link to comment Share on other sites More sharing options...
CharlieH Posted July 14, 2013 Share Posted July 14, 2013 http://i783.photobucket.com/albums/yy114/Charlie18061/FE5376C7-4B5B-42B2-82A2-863771849255-7905-000003FBF6F2F780.jpg I created that effect with 12 cheap Chinese lasers; a 2m circle of MDF with some holes drilled in it, and a homemade 12 channel DMX power pack (so as to avoid them running on batteries). The entire device cost roughly £100 :) As I'm replying from my phone I apologise if the picture didn't show, however clicking on the link should still work Link to comment Share on other sites More sharing options...
erroneousblack Posted July 14, 2013 Share Posted July 14, 2013 A Strand Prelude, a home-made gobo and a mirror recycled from the local charity shop were used . Spool through to 3:35. It was much more effective on the evenings when the stage crew remembered to switch on the hazer. Why should the stage crew switch it on, it's LX kit! Link to comment Share on other sites More sharing options...
Smiffy Posted July 15, 2013 Share Posted July 15, 2013 Forgive me for being 'old skool' here, but could a similar effect not be achieved with Pin Spots? Link to comment Share on other sites More sharing options...
mar Posted July 15, 2013 Share Posted July 15, 2013 We had great success when we did WWRY with pinspots built into the floor - had the added bonus of enough spilled light to uplight the prisoners beautifully. Link to comment Share on other sites More sharing options...
LXbydesign Posted July 16, 2013 Share Posted July 16, 2013 If your going down the profile / gobo route, I would either use your Selecon or hire / borrow a Source with a wide angle tube. The Silhouette and certainly a prelude wouldn't have enough punch. Last time I did WWRY, I was using HES Technobeams which very helpfully had lasers on them as well! Link to comment Share on other sites More sharing options...
Brian Posted July 16, 2013 Share Posted July 16, 2013 Thinking out aloud... I wonder if you could use one of those curved security mirrors to give yourself the extra beam divergence you need? Link to comment Share on other sites More sharing options...
boatman Posted July 16, 2013 Share Posted July 16, 2013 Lots of ideas there, but one thing you really must have is smoke or haze. Without it the laser cage is just spots on the floor and the beams are invisible. Link to comment Share on other sites More sharing options...
paulears Posted July 17, 2013 Share Posted July 17, 2013 I rather like the idea of lots of cheap 'toy' lasers. If you could form a circle with dozens of them, you'd have a pretty good tube of light. The thing with the real one was it was BRIGHT. Pinspots would work, I think, but it would look like lights, not a tube of light. Link to comment Share on other sites More sharing options...
hollowsphereaudiovisual Posted July 29, 2013 Share Posted July 29, 2013 Dan, we are dealers for laserworld. Have a look at their budget range to suit your requirements, we can then offer you a decent price.PM if you require any laser tech info. PSDan, did you work for Contact Theatre in Manchester? Link to comment Share on other sites More sharing options...
norty303 Posted July 30, 2013 Share Posted July 30, 2013 ...or see here... ;) http://www.blue-room.org.uk/index.php?showtopic=58346 Link to comment Share on other sites More sharing options...
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