Brainiac75
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Are lasers safer with rechargeable batteries?
🕑 Added 2021-06-26 17:48:00 +0000 UTCUsing an ND8 filter on different lasers in the divergence video, I felt like it really didn't lower the power 8 times as specified. To my eyes, the spots looked too bright.
So why not make a video on testing a neutral density filter?
During the filming, I noticed my Dilda laser seemed underpowered and suddenly my focus switched to testing batteries' effect on output power.
Will rechargeable 1.2V Ni-MH batteries lower the output from a cheap eBay laser pointer?
Find out in the video and comment with other suggestions on how to lower a laser beam's power. I'm ready to test (almost) anything in an upcoming video :)
Comments
It seems weird they wouldn't get that parameter right. Getting the 'darkening' effect to affect all colors equally in a neutral way must be the hard one. Especially when it has to perfectly even all over the filter - both for neutrality and rating. But that crucial balance might affect the rating. Hitting the balance between neutrality and equality all over in every filter in a mass production - while still hitting the right rating - must be challenging. I will bet it is not easy to make a great ND filter without making it very expensive :)
Izzie
In my experience (at least using ND filters for video/photos), most filter manufacture's advertised ratings are basically arbitrary. Some are off by as much as 2/3rds of a stop - which is a significant difference!
