Mark M Posted November 27, 2009 Share Posted November 27, 2009 Only really looking for an el cheapo to test it out but can anyone tell me what will be the best angle to go for out of the 20 or 40? Its bascially going to be sat behind a drum kit to light the back wall up Thanks, Mark Link to comment Share on other sites More sharing options...
Guest lightnix Posted November 27, 2009 Share Posted November 27, 2009 Common sense says: "Short throw = wider angle", but I'd go for the narrower angle and experiment with various diffusion gels, if it needed spreading out. Hope that helps Link to comment Share on other sites More sharing options...
Brian Posted November 27, 2009 Share Posted November 27, 2009 Roughly, for a unit 1m away from a surface, you will get the following diameters of light pool for a given beam angle... 20 degree = 350mm40 degree = 730mm60 degree = 1150mm80 degree = 1670mm100 degree = 2380mm ...for a 2m throw x2 the diameter, for 3m x3 etc etc For many 'pub and club' stages and their associated short throws the narrow angle on cheaper LED units means you get a pool of light which doesn't cover the object/person you want to light. Link to comment Share on other sites More sharing options...
Guest lightnix Posted November 27, 2009 Share Posted November 27, 2009 For many 'pub and club' stages and their associated short throws the narrow angle on cheaper LED units means you get a pool of light which doesn't cover the object/person you want to light.That's very true, but this is more for chucking some light up a wall - like a cyc unit. Maybe I was making an incorrect assumption by mentally picturing a batten type luminaire for this application, when the OP hadn't specifically mentioned one Link to comment Share on other sites More sharing options...
Bryson Posted November 27, 2009 Share Posted November 27, 2009 Also, you can add frost/silk/diffusion to the narower unit to make it wider, but you can't "anti-frost" the wider unit to make it narrower. Link to comment Share on other sites More sharing options...
J Pearce Posted November 28, 2009 Share Posted November 28, 2009 And you can widen in one direction with frost, to make the beam more oval (assuming it started out circular). Link to comment Share on other sites More sharing options...
jimbo7744 Posted November 28, 2009 Share Posted November 28, 2009 Jon, I think you mean Silk as a posed to frost to widen a beam in one direction! Jimbo Link to comment Share on other sites More sharing options...
J Pearce Posted November 28, 2009 Share Posted November 28, 2009 Indeed I did, the term silk escaped me at the time. Link to comment Share on other sites More sharing options...
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