Somewhere on the forums it got brought up that Paul should manufacture Pyrex domes in common lighting condition colors, like CTO and CTB etc etc.. Basically something in your common tungsten color would work for me and my indoor drag the shutter ambient light shoots.
Anyway, I'm not sure what happened to the thread, but I think Paul you were considering it?
Is it going to happen?
As I'm down for them if they're not to much more then buying a spare Pyrex dome. Saves having to breakout the gels then finding a goofy way to fit them onto the lights etc.. Though they would need a case for each individual colored dome. Or if purchased in a set a case that holds all the colors. (wouldn't need many like 4-6 colors)....
Anyway sorry to bring it up again, but just received the lights, and thought about how perfect it would be to get colored pyrex domes.
Best,
Adam
P.S. Paul you could even make them out of a plastic molded to the shape of the dome so we could just slip it over and hook it into one of the clamps.
I think Paul has mentioned offering a colored dome or two in the near future, and price was going to be about $15 if I remember correctly.
Have you tried to remove the current dome? I was wondering how much trouble it is to change. The thing looks damn delicate, so I hated to try when I have no reason to do so. That's usually when I break stuff.
Removing and replacing the Pyrex dome is pretty straightforward. Just remember to us a tissue or cloth to protect the dome from the acidic skin oils on your fingers.
We have a dome available with UV coating that lowers the color temperature by 400°K. (The flashtube is already UV coated) We have no source for CTO type glass . . . getting the frosted Pyrex ones was not easy. Plastic won't work . . . too much heat. Removal is simple and they are not particularly fragile.
Paul have you thought of something like the Lee filters. Gels? Maybe just having them moulded to dome shape. So you can stick them on the domes themselves. Surely that material can resist the heat. The movie industry uses them. Unless I'm missing something.
adamdewilde wrote:
Paul have you thought of something like the Lee filters. Gels? Maybe just having them moulded to dome shape. So you can stick them on the domes themselves. Surely that material can resist the heat. The movie industry uses them. Unless I'm missing something.
you are missing something. Intense and localized heat. Even Lee and Rosco recommend having a significant gap and airflow around their heat resistant lighting gels.
Beam Spread:
Fixtures with beam spreads wider than 45° may exhibit color shifting at the periphery of the beam. The wider the beam spread, the more significant the color shift will be. Unlike glass dichroic filters, DichroFilm can be arched or curved to compensate for the color shift. Ensure a support frame is in place to hold DichroFilm in position once curve angle is determined.
Heat:
Maximum temperature limitations for each DichroFilm color have not been determined. Please contact Rosco for further details or perform your own tests as needed.
I have requested pricing info but it sounds like they are primarily intended for architectural type installations ( think Statue of Liberty, Empire State Building, Las Vegas Strip, Miami, Dubai, etc.
If the filter shapes a tube (with a lid) around the dome I'd expect that the angle of the beam spread equals zero - hmm... assuming that Rosco refers to the exit beam of a given 'standard' fixture.
I once metered the temperature of 650W model light close to the glass dome (Bowens) at 60° C / 140 F. Makes me suppose that the dichroic takes the heat of 250W well, but Rosco will know better, for sure.
On another note, a dichroic custom coating of the domes, at best in bulk, may be doable?
www.cbs-dichroic.com
www.flabegusa.com/dichroic_glass.html
www.highend.com/products/dichroic/
What enhaces my 'idea' is the fact that Briese does exactly this with his tube shaped HMI inserts for e.g. the Focus.
!!!
- hmm... assuming that Rosco refers to the exit beam of a given 'standard' fixture.