bythesea.33 Posted February 6, 2006 Share Posted February 6, 2006 yep 10m isn't all that far in the scheme of things.a 5 degree or a 10 will be pretty tight.19 degree at most would be good.anyone know how well source 4 jr zooms throw over that distance? Link to comment Share on other sites More sharing options...
Just Some Bloke Posted February 6, 2006 Share Posted February 6, 2006 yep 10m isn't all that far in the scheme of things.[snip]anyone know how well source 4 jr zooms throw over that distance? Distinctly useable and a lot better than a Minuette. Link to comment Share on other sites More sharing options...
johnhuson Posted February 6, 2006 Share Posted February 6, 2006 anyone know how well source 4 jr zooms throw over that distance? As said before they throw fine and would be better than a Minuette, one thing to note though is the S4 Junior Zoom is only available in 25-50 degrees. If you wanted something narrower then you would have to go for the full size S4 Zoom which is 15-30 degrees. However these are quite big beasts, fixed angle with a selection of lenses is neater but more expensive! Link to comment Share on other sites More sharing options...
Just Some Bloke Posted February 6, 2006 Share Posted February 6, 2006 one thing to note though is the S4 Junior Zoom is only available in 25-50 degrees. If you wanted something narrower then you would have to go for the full size S4 Zoom which is 15-30 degrees.... or use an iris! Link to comment Share on other sites More sharing options...
johnhuson Posted February 6, 2006 Share Posted February 6, 2006 ... or use an iris! Fair point but irises block output as well, better to have the correct fixture in the first place. Link to comment Share on other sites More sharing options...
Rich newby Posted February 6, 2006 Share Posted February 6, 2006 Strand Sl10 or Sl19? Or a Strand Sl 15-32 zoom depending on budget. My Favourite Profiles, the Strand sl zooms, if you budget can go to them I would recommend them over a minuette anyday. Rich Link to comment Share on other sites More sharing options...
erik10_4 Posted February 6, 2006 Author Share Posted February 6, 2006 Some good stuff here (I'm learning quite a lot!). Still don't understand paulears trigonometry stuff I'm afraid! I want to be able to achieve a 5 - 6 foot diameter spot from a throw of about 10 metres. I had guessed that I needed an angle of between 6 - 10 degrees. Is this saying I've got it wrong (wouldn't be a bit surprised - maths never a strong point!). Is there a formula for calculating such things (I feel trigonometry looming again - but happy to learn)? By the way, would love to be able to consider some of the kit mentioned, but on my budget, out of the question (Strand sl zoom £400+ ?, Minuette circa £120, bit of a difference guys! (even £120 is a lot for my humble budget) Regards to all :P Link to comment Share on other sites More sharing options...
david.elsbury Posted February 6, 2006 Share Posted February 6, 2006 If you go to http://www.paul-pelletier.com/and download the very useful LD Calculator it has a tab in there for calculating beam angles. Unfortunately, I've not been able to work out whether, when you put in distances, it reads them as feet or as metres.... (can anyone help me on that one?) David Link to comment Share on other sites More sharing options...
Just Some Bloke Posted February 6, 2006 Share Posted February 6, 2006 It's metres and it says that if you have a 9m throw and want a beam diameter of 1.1m, then you need a beam angle of 7 degrees. HTH Link to comment Share on other sites More sharing options...
pete LD Posted February 7, 2006 Share Posted February 7, 2006 By the way, would love to be able to consider some of the kit mentioned, but on my budget, out of the question (Strand sl zoom £400+ ?, Minuette circa £120, bit of a difference guys! (even £120 is a lot for my humble budget) I think your shopping in the wrong place!! I assume as you mention ebay your after 2nd hand kit? if you are you need to try usedlighting.co.uk. minuettes are about £80 and I thing a s4 19 is about £120? so not out of your range at all they don't get meny sl on there but I think there is a narrow one on there now?happy shopping and I hope you get some good kit now your budget will go further!!pete Link to comment Share on other sites More sharing options...
Ekij Posted February 7, 2006 Share Posted February 7, 2006 Unfortunately, I've not been able to work out whether, when you put in distances, it reads them as feet or as metres.... (can anyone help me on that one?)It doesn't matter what units you use, as long as you use the same units for all the distances.i.e. If your throw is 10m then the desired diameter has to be in meters; 1.1 (not 4 feet)If your throw is 33 feet then the desired diameter has to be in feet; 4 (not 1.1 meters). Trig. SOHCAHTOA: Opposite (4) / Adjacent (33) Tan^-1 = angle.4/33 = 0.121Tan-1(0.121) = 6.9 (degrees) Link to comment Share on other sites More sharing options...
erik10_4 Posted February 8, 2006 Author Share Posted February 8, 2006 By the way, would love to be able to consider some of the kit mentioned, but on my budget, out of the question (Strand sl zoom £400+ ?, Minuette circa £120, bit of a difference guys! (even £120 is a lot for my humble budget)I think your shopping in the wrong place!!...Sorry, my post was a bit misleading here. The price comparisons I listed were for 'new' items. I was assuming that the differential would be similar at 'used' prices (i.e. If a Minuette could be sourced (used) for circa £80, then the Strand sl zoom would come in at a used price of circa £260). Perhaps this was a false assumption. Thanks also to others for LD calculator web reference and Trig (now I know why I wasn't any good at maths) Regards Link to comment Share on other sites More sharing options...
Rich newby Posted February 8, 2006 Share Posted February 8, 2006 Remember the second hand price will take into account the state of the lantern and should be a bit cheaper if they have quite a few to sell! What about second hand acclaims? Rich Link to comment Share on other sites More sharing options...
Just Some Bloke Posted February 8, 2006 Share Posted February 8, 2006 It doesn't matter what units you use, as long as you use the same units for all the distances. True, but if you've got a 26 degree lens with a throw of x and want to know the size space you're going to be lighting, it will give you an answer in decimals (e.g. 6.4) which is much easier to understand in metres than in feet (how many inches is .4 of a foot? - personally I'd have to use a calculator - whereas .4 of a metre is easy). Give me metres any day! :( Link to comment Share on other sites More sharing options...
erik10_4 Posted February 8, 2006 Author Share Posted February 8, 2006 What about second hand acclaims? Rich Mmmm, Acclaim 650W Zoom Profile looks interesting (but unsure of angle suitability) :( . Link to comment Share on other sites More sharing options...
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