Z
z_cgeers
Guest
I've been using an old ring flash for still work and want to build an led powered ring light that I can use for video and stills as well. I want it to be bright and dimmable.
I've looked at the sst-90 led and think it would be perfect. Running 7 of them in a ring with an inside diameter of 5- 7 inches for lenses to poke through is about the right form factor. I'm thinking that this would produce about 16000 lumens if I'm doing my math right.
My questions are:
1. Can the sst-90 be dimmable in a way as to not create pulsation? This is a terrible effect with video.
2. What kind of power supply would I need to run 7 sst-90's for about 2-hours at full power?
3. Is there a source for daylight balanced sst-90's? If not, is it possible to get them in matching sets, where all pieces have the same color temp?
4. Is the beam spread of the bare sst-90 pretty wide?
5. Im thinking these would be mounted to an aluminum ring with a outer diameter of 10-12 and a center hole with a diameter of about 5-6. Would this be a sufficient heat sink for 7 sst-90s mounted equidistantly around the face of the ring or would I need to have a finned aluminum ring machined?
The goal of this project would be to create a stable, inexpensive ring light that produces enough power to be used as a fill light in full daylight.
One last question, please pardon me for not being tech savvy.
Is it possible to rig the sst-90's with some sort of flash circuitry that would pulse it from low power for focus to a very fast burst of light adequate in power to allow a faster shutter speed to capture images that are motion blur free? Or can they be fired with a very short duration much like a camera flash?
I've looked at the sst-90 led and think it would be perfect. Running 7 of them in a ring with an inside diameter of 5- 7 inches for lenses to poke through is about the right form factor. I'm thinking that this would produce about 16000 lumens if I'm doing my math right.
My questions are:
1. Can the sst-90 be dimmable in a way as to not create pulsation? This is a terrible effect with video.
2. What kind of power supply would I need to run 7 sst-90's for about 2-hours at full power?
3. Is there a source for daylight balanced sst-90's? If not, is it possible to get them in matching sets, where all pieces have the same color temp?
4. Is the beam spread of the bare sst-90 pretty wide?
5. Im thinking these would be mounted to an aluminum ring with a outer diameter of 10-12 and a center hole with a diameter of about 5-6. Would this be a sufficient heat sink for 7 sst-90s mounted equidistantly around the face of the ring or would I need to have a finned aluminum ring machined?
The goal of this project would be to create a stable, inexpensive ring light that produces enough power to be used as a fill light in full daylight.
One last question, please pardon me for not being tech savvy.
Is it possible to rig the sst-90's with some sort of flash circuitry that would pulse it from low power for focus to a very fast burst of light adequate in power to allow a faster shutter speed to capture images that are motion blur free? Or can they be fired with a very short duration much like a camera flash?
