deviant said:Are you guys serious? It's a tail light. Talk about over thinking a simple device. 1400 lumens is going to make his ass look like its on fire. No need for robots.
deviant said:Yes. F-stop refers to light gathering, not light illumination.
deviant said:Are you guys serious? It's a tail light. Talk about over thinking a simple device. 1400 lumens is going to make his ass look like its on fire. No need for robots.
That's not correct. One stop is an EV or focal value. Each stop or f number represents half of the lighting from the previous value. It correspond to the decrease in the pupil and aperture diameter by 1 divided by the square root of 2. The numbers are a geometric sequence that are actually rounded off.AgentX said:Technically, it refers to the relationship of the width of the aperture to the focal length of the lens.
(f/2 is open to a diameter equivalent to 1/2 the focal length of the lens, f/16 is 1/16th, etc.; thus, the image projected at the focal plane for a given aperture is of the same intensity whether you're dealing with a long or a short lens.)
and i fergot it was called an aperapture and was calling it a shudder ;D :deviant said:That's not correct. One stop is an EV or focal value. Each stop or f number represents half of the lighting from the previous value. It correspond to the decrease in the pupil and aperture diameter by 1 divided by the square root of 2. The numbers are a geometric sequence that are actually rounded off.
What you are referring to is f-number for focal ratio. It is used to control values as they relate to depth of field.
Just for the record, I think your idea of using an aperture for a tail light lens is badass.xb33bsa said:and i fergot it was called an aperapture and was calling it a shudder ;D :
I was eventually going to suggest lasers with variable focus, but lens flashes could be more amazing. Imagine having an etching laser that you could scribe words into the front end of a car with. You could etch "douche bag" into the chrome grill of every truck in town.mydlyfkryzis said:I am subscribing just for the photography lessons.....
Hey, why not use a Xenon Lamp for the brake, salvage the flash from a disposable camera. When you hit the brake, the people behind will see a red lightning!!
So lets talk what flash guide number....I am thinking a flash with a 120 guide number would be just about right for taking some paint of the car too close behind you!
Nothing really. Just seemed over engineered for this build. I wouldn't equate it to wipers on a Mercedes headlight.Flugtechnik said:What's wrong with robot tail lights?
On the previous incarnation of my bike I had a blindingly bright LED taillight from a tractor trailer. I seriously got complaints about how bright it was.
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