My "Mummy & Daddy" gave it to me in 1955 !!
Mostly, in 'Forums', 'Quora', 'Youtube' etc, I use my real name, as I don't/need/want
to Hide my true self. I'm open to anyone.
On certain specialized sites/followings, I use the name "NeutralDensity"......
Mostly just for 'fun'... due to my life long interest in photography, amongst others !!
(Orig pre-digital, a 'Neutral Density' Filter, as by the book, is a filter that reduces or modifies
the intensity of all wavelengths of light equally, giving no changes in hue of color rendition).
I used to often utilize some almost as dark as a welding-mask glass !!!! (on a tripod of course).
NORMAL exposure, may be something like.... F11, 125th/Sec. However with this 'filter' it may
be an exposure time of 1 or 2 minutes !!... Why do this
....
Transient objects in the 'scene' like moving vehicles/people walking past, have LITTLE effect on
the framed exposure. The 'myriad' of pedestrians etc simply vanish for architectural shots!!!