Pixel Aspect Ratio's

[llbbl]

http://www.creativecow.net/articles/gerard_rick/pixel_madness/

The circle in the NTSC SQ composition on the left appears to be a perfect circle. The circle in the NTSC Rec composition on the right looks distorted. It looks distorted because After Effects has taken the square pixels in the original image and stretched them so that the image retains its original aspect ratio. The important thing to remember here is that the pixels in the image have changed in the NTSC Rec composition, but the image has not been distorted. It only looks distorted in the Composition window. The circle is still a circle and it will behave very nicely when rotated. So, are you confused yet? We must all stick together. Listen to Dr. Strangepixel. We must work quickly or there will be a mind shaft gap. (I know how old you are if you got that joke. For those that got it, I sincerely apologize.)

sometimes they are not always square like you think they are.

[spankers]

oh yah???!!! my pixels are orthogonal (http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=orthogonal&x=19&y=15) tesseracts (http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=tesseracts&x=12&y=15) and it doesn't matter what the aspect ratio is! :)

[ECA]

its fun to SHOW ppl that a pixel ISNT square...its a rectangle.
Im waiting for Hexigon, and octagon shaped, then we can get TRUE to form charactors..

Trying to explain DPI, screen res, to people is abit over most persons heads...With a new format it would be much easier..

[llbbl]

Fuji has Hexagonal Pixels.

[llbbl]

. The original design had two photosites; one regular one for normal exposure (called an S-Pixel), and a second one for highlights, called an R-Pixel, located in the same unique Fuji-design hexagonal shape.

http://www.luminous-landscape.com/reviews/cameras/s3-pro.shtml