"He who marches out of step hears another drum." ~ Ken Kesey
Stay tuned. We're about to make this comparison, in as scientific a manner as possible. 5kw halide, dialed in with the highest quality bulb, new photocell and good integrator shooting 2up v starlight led shooting 1up. High d max, good d min film. Exposure time, exposure quality, power consumption, resolution will be the main points of comparison. If anyone wants me to add another item to the testing or has suggestions please let me know. I'm hoping to get an accurate handle on of this tech is ready for prime time. Sent from my SM-G900V using Tapatalk
Quote from: ZooCity on March 05, 2015, 12:45:30 PMStay tuned. We're about to make this comparison, in as scientific a manner as possible. 5kw halide, dialed in with the highest quality bulb, new photocell and good integrator shooting 2up v starlight led shooting 1up. High d max, good d min film. Exposure time, exposure quality, power consumption, resolution will be the main points of comparison. If anyone wants me to add another item to the testing or has suggestions please let me know. I'm hoping to get an accurate handle on of this tech is ready for prime time. Sent from my SM-G900V using TapatalkNot to give you crap for impending interesting free info, but why MH 2-up and LED 1-up?Sounds like it would be a little 'off' from an apples to apples type comparison.
D- my starlight builds up heat if you burn 10 or so in a row....fyiwe didn't purchase our starlight for speed, we bought it to eliminate a variable. we now have a constant for exposure. a 180 S mesh, 1/1 with HXT is 70 seconds. all the time. every time. forever.
Can I send you a gallon of 1400 to compare on the two units? While I appreciate your testing as well Homer, I don't know that you'd notice muchdifference unless you have a MH unit to compare it to.
We're currently using two 1200 watt MH units to keep up with screen production. We use SP-1400 diazo emulsion, probably one of the more difficult emulsions to fully expose. I'd start exposing with a candle before I switchedemulsions, I like the stuff that much.Our exposure times are long, 4-600 LTUs, probably roughly five minutes, never timed one though. Obviously it would be a no brainer if we could significantly reduce that time. Not to mention heat, powerconsumption, bulb replacement, etc. I am absolutely unwilling to sacrifice image quality and complete exposure for the above mentioned benefits however.I'd sooner buy a couple 8K Olec's and to hell with the bulbs and power costs.So far I have been unable to get a straight answer, from either manufacturer or user, as to whether or notI'd have to accept a degradation in screen quality from a LED unit for diazo emulsions. Every time I ask forquantifiable information all I get back is "it's so fast". I hear whispers from trusted sources that my assumptions arecorrect though, this post being yet another one.It seems the majority of LED units are being used with photopolymer emulsions, which is kind of confusing asexposure times with most MH units are going to be in the sub-minute range already, and going from 50 secondsto 10 with the possibility for less complete control seems like a losing game. I guess if you were coming fromfluorescent it would make sense. Indeed, Workhorse's LED user manual states that the machine is intended foruse with photopolymer emulsions.That one MFG has a generous return policy, but I'd honestly feel bad about sending the thing packing right back if itdoesn't cut the mustard. I'd rather know the straight dope beforehand. So, really, honestly, diazo and LED, yay or nay?