How do you do that Spotlight/Light Beam effect

Started 2 months ago | Discussions thread
Ed Shapiro
Ed Shapiro Regular Member • Posts: 328
Re: How do you do that Spotlight/Light Beam effect

RobzLondon wrote:

Rico Tudor wrote:

Projection attachments like the Dedolight DP1 and the Godos SA-P have kob which lets you tilt the front of the projector to correct the distortion in cases like this.

DP-1 cannot be tilted. A perfectly circular spotlight when hitting the b/g at an angle can be achieved with an elliptical gobo although the focal plane will not fall correctly for sharp edges all around. DOF can be increased by pulling the fixture way back but illumination efficiency will suffer the inverse-square law.

Inverse square law does not apply to focused or collimated light!

https://www.parabolixlight.com/debunking-the-inverse-square-law

Are they claiming that with their reflector design you will set up your flash unit in one of their reflector models and make a meter reading at say 8 feet away than another reading at 12 feet away and there will be no loss of light? And...what does that have to do with an optical spotlight?  Sounds interesting!

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Ed Shapiro- Commercial and Portrait Photographer. Ottawa, Ontario Canada

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