Lens are circular, so we should have circular image sensors and circular film to maximize the use of our lens. Or at least, we should have square pictures. It can be shown using calculus that the square is the maximum-area rectangle that can be inscribed inside a circle.

360° = 2π radians. All hail the almighty circle.
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== my cameras ==
SLR: Nikon D70, D90, Olympus E-P1 (m43 != SLR)
lens: Nikkor 10.5mm fisheye, Sunex superfisheye 5.6mm, Tamron 28-80mm, Tamron 18-270mm, Soligor 400mm, Tamron mirror 500mm, Opteka mirror 500mm, Nikkor 12-24mm, Tamron 70-210, Nikon FC-E8, Nikon FC-E9, Olympus m43 17mm pancake, Olympus m43 14-42mm,
point&shoot: Nikon Coolpix 2500 & 3500, Canon Powershot S1IS, Canon 100HS, Nikon Coolpix S4, Olympus Stylus 770SW, Canon SD750, Canon S400 & S410, Kodak DC20 & DC25, Sony Webbie & Bloggie, Nikon Coolpix 990, Kodak DC50 & DC120
broken: Canon S100 , Canon S200, Casio Exilim M20u, Panasonic SV-AS10

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Joined:
May 2008
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