ultra pars, star pars Source four pars

[legacy]

I purchased 24 I think Ultra pars.. Knock offs of the ETC and parnels.. My problem is Gels do not last through a production and have to be changed out every night UGH............ have used a film that was suppose to hlep but didnt. I bought what BMI told me was high temp and it didn't work... Is it because its an off brand or does te ETC have the same problem.... Hope I get answers from those that are not ETC fanatics.. <g> lol

Lee

[fosstech]

I know our S4 Pars don't burn through gel at all. We even have a few up as worklights with long life HPL lamps in them, and they haven't burned through the gel that's on them once. I don't think they're even the MCM version.

What wattage are you running them? What color(s) gel is it burning through?

[JSFox]

I have a bunch of Starpars which are also semi knockoffs of the S4's. They do not have anywhere near the beam accuracy of the S4's (they are really a broad wash instrument regardless of lens) and do burn through gel a bit faster than the S4's, but we can usually get 2 - 3 shows out of them (Rosco or Lee) most times.

I'm an S4 fanatic simply because their pars and leko's work better than anyone else's (except perhaps selecon).

[fosstech]

Originally Posted by JSFox

I'm an S4 fanatic simply because their pars and leko's work better than anyone else's (except perhaps selecon).

...at quite a premium over the S4. We have one Selecon in our inventory. It's a 90 degree fixture, and we use it as an infrared emitter so the SM's video camera can see in the dark. Just stick a red, green and blue gel on there all at the same time and you'll get no visible and all infrared. It's the only fixture that won't burn out that combo of gels

Anywaze, back to the topic...

[Pie4Weebl]

Originally Posted by fosstech

...at quite a premium over the S4. We have one Selecon in our inventory. It's a 90 degree fixture, and we use it as an infrared emitter so the SM's video camera can see in the dark. Just stick a red, green and blue gel on there all at the same time and you'll get no visible and all infrared. It's the only fixture that won't burn out that combo of gels
Anywaze, back to the topic...

Really? I thought the whole benifit of those fixtures was the infared mirror in it which filters out those frequencies?

[zac850]

Yea, thats what I heard to. Has anyone checked to see if the SMs camera works even if the light is off?

That being said, those cameras are usually fairly sensitive, so it may be that the selicon gives just enough IR light to work and still shunts most of the IR heat out the back....

[fosstech]

Yeah, you have to remember though that something like 90% of the energy outputted from a halogen lamp is infrared. The remaining 10% is what you see. So what's left after the Selecon's mirror is enough for the camera, since it isn't 100% efficient. If it was, the light would have very little if any heat energy. Selecon's datasheets say the mirror is "over 80%" efficient. So when you do the math, 20% of the 90% of the total energy output is still more energy than what the unit puts out in visible light. So there's still a significant amount of infrared energy being emitted, just not nearly as much as something like a 360Q.

And no, the camera doesn't work with it off in a blackout.

[Pie4Weebl]

yeah I suppose that makes more sense now.

Hmm that actually might be a usuful trick when video companies are filming and want front light brighter than I do...

[jonhirsh]

Originally Posted by Pie4Weebl

yeah I suppose that makes more sense now.
Hmm that actually might be a usuful trick when video companies are filming and want front light brighter than I do...

umm regular cameras do not use inferred. Only cameras that are designed to see in the dark do like security cameras. So your regular film or telivision camera still requires an large amount of light. But there still are ways to make allot of front light for camera look pretty in person. It just takes skill.


JH

[Mayhem]

The camera issue aside, you may be a little confused as to the IR 'filter' in the reflector. My understanding is that this is to bleed away heat through the back of the reflector, which has obvious benefits. However, if you are trying to produce IR light via gels, how would the reflector prevent IR light from being produced?

The reflector is designed to reduce the IR emission and reflect the visible light forward, through the optics of the unit. Therefore, whatever you place in front of the unit will not be affected by the reflectors ability to bleed off IR.