Hi all,
I wonder if any of you can help me with this.
I've purchased this reflector:
G&P Optoelectronics GmbH & Co. KG - Reflector 68mm f=40mm dichroic 06-04-02 (is this perhaps the same as the LumenLabs Pro Reflector?)
diameter: 68 mm
focal length: 40 mm
I'm wanting to see if it will work ok with an Osram Powerstar HQI-TS which has a radius from the centre of the bulb to the outer edge of 16.5mm.
As this is a spherical reflector I assumed that I should place the bulb at the centre of the effective sphere which is actually 25mm from the back of the reflector - not 40mm!
How can the focal length be 40mm if the centre of the sphere is at 25mm?! Am I missing something here?
I've attached a diagram to show what I mean.
As I only seem to have 5mm from the edge of the reflector to the bulb centre I don't think this will work. Does anyone have any ideas?
Thanks!
I wonder if any of you can help me with this.
I've purchased this reflector:
G&P Optoelectronics GmbH & Co. KG - Reflector 68mm f=40mm dichroic 06-04-02 (is this perhaps the same as the LumenLabs Pro Reflector?)
diameter: 68 mm
focal length: 40 mm
I'm wanting to see if it will work ok with an Osram Powerstar HQI-TS which has a radius from the centre of the bulb to the outer edge of 16.5mm.
As this is a spherical reflector I assumed that I should place the bulb at the centre of the effective sphere which is actually 25mm from the back of the reflector - not 40mm!
How can the focal length be 40mm if the centre of the sphere is at 25mm?! Am I missing something here?
I've attached a diagram to show what I mean.
As I only seem to have 5mm from the edge of the reflector to the bulb centre I don't think this will work. Does anyone have any ideas?
Thanks!
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