I was always a rotary engine enthusiast. My 1st and 2nd cars were RX7's..
I'm a math professor, and I've always been fascinated by squid.
Legally, I own the trademark starting in 1989 the date of conception and first use
Must all trademarks be registered? No, registration is not mandatory. You can establish “common law” rights in a mark based solely on use of the mark in commerce, without a registration.
(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!!!
(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!!!
Using these filters one can make real stunning photos, like the first one on this page:
http://world.wideweg.de/fotografieren-im-wasser-das-solltest-du-beachten/
Note: Not my photos, it's GFs daughter who does these great photos, she just published an ebook about aurora borealis (northern lights), planned to translate to English. It features really great photos, I'm impressed every time I look at them.