topsy100 Posted May 12, 2011 Share Posted May 12, 2011 right here is my question..... I have source 4 profiles all 26 degree.... by moving the lens in the tube can I change them to 36 or even 50. it would seem like its possible as the tube is marked for differant angles however does the lens change also???? cheers chaps and chapes's Link to comment Share on other sites More sharing options...
paulears Posted May 12, 2011 Share Posted May 12, 2011 If you have a zoom, then you can adjust the beam angle - there are two versions, one a more wide angle range and the other narrower to cater for throw differences. The single lens version is a fixed beam angle - the adjustment simply gives you sharp or soft focus - proper beam angle adjustment means different lens assemblies. Link to comment Share on other sites More sharing options...
IRW Posted May 12, 2011 Share Posted May 12, 2011 right here is my question..... I have source 4 profiles all 26 degree.... by moving the lens in the tube can I change them to 36 or even 50. it would seem like its possible as the tube is marked for differant angles however does the lens change also???? cheers chaps and chapes's If you want to use the lens tubes as 36' then you need the 36' lenses to put in them. Same for if you want them to be 50's or 19's. Link to comment Share on other sites More sharing options...
topsy100 Posted May 12, 2011 Author Share Posted May 12, 2011 thanks IRW you understood my question. So the answer is as I thought the lens in a 26 cannot just be moved to the 36 position you need a 36 lens too cheers Link to comment Share on other sites More sharing options...
Phill.Beynon Posted May 12, 2011 Share Posted May 12, 2011 Someone correct me if I'm wrong but if the lens tube is marked up with different beam angles then surely you have the zooms? If it says 26 degree on one of the sticky-out-bits at the end of the lens tube then it's 26 degrees and is fixed. You can make it bigger by defocussing it but not to 36 or 50 degrees. If you can make it sharp at different sizes then it's a zoom and will do those beam angles and anything in between. Link to comment Share on other sites More sharing options...
IRW Posted May 12, 2011 Share Posted May 12, 2011 thanks IRW you understood my question. So the answer is as I thought the lens in a 26 cannot just be moved to the 36 position you need a 36 lens too cheers Pretty much, infact for a 36' I think you need two lenses- certainly all the 36' source fours that we had at my previous place of work had two lenses in- made them a right pain to clean during maintenance! Link to comment Share on other sites More sharing options...
LeeStoddart Posted May 12, 2011 Share Posted May 12, 2011 Someone correct me if I'm wrong but if the lens tube is marked up with different beam angles then surely you have the zooms? If it says 26 degree on one of the sticky-out-bits at the end of the lens tube then it's 26 degrees and is fixed. You can make it bigger by defocussing it but not to 36 or 50 degrees. If you can make it sharp at different sizes then it's a zoom and will do those beam angles and anything in between. The OP is not referring to the markings on the outside of the lens tube. If you dis assemble the lens tube you will find inside that there are lugs which support the lenses in position. The different positions are marked with 19, 26, 36, 50 (in the last one I looked at) - these indicate where the lens needs to be positioned for each particular configuration. But as other posters have said, physically different lenses are probably used in the different sizes. The markings are a type of error proofing for the assembly process (and also indicate where to put the lens when you re-assemble after cleaning). Link to comment Share on other sites More sharing options...
jonathanhill Posted May 13, 2011 Share Posted May 13, 2011 The lenses and positions for each of the 19, 26, 36, 50 degree options, including the ELDT option, are all different and are dealt with here: http://www.etcconnect.com/docs/docs_downloads/manuals/S4_Lens_Tube_Product_Update_RevB.pdf This should give you all the information you need. Link to comment Share on other sites More sharing options...
Phill.Beynon Posted May 13, 2011 Share Posted May 13, 2011 Someone correct me if I'm wrong but if the lens tube is marked up with different beam angles then surely you have the zooms? If it says 26 degree on one of the sticky-out-bits at the end of the lens tube then it's 26 degrees and is fixed. You can make it bigger by defocussing it but not to 36 or 50 degrees. If you can make it sharp at different sizes then it's a zoom and will do those beam angles and anything in between. The OP is not referring to the markings on the outside of the lens tube. If you dis assemble the lens tube you will find inside that there are lugs which support the lenses in position. The different positions are marked with 19, 26, 36, 50 (in the last one I looked at) - these indicate where the lens needs to be positioned for each particular configuration. But as other posters have said, physically different lenses are probably used in the different sizes. The markings are a type of error proofing for the assembly process (and also indicate where to put the lens when you re-assemble after cleaning). Aahhh I see, sorry. Never had to take one apart to find out! Link to comment Share on other sites More sharing options...
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