From time to time I rant on about battery/portrait grips (aka bricks) and how it's dead easy to turn the camera through 90 degrees without one, but really we shouldn't need to.
Lenses create a circular image, a lot of which is wasted by conventional rectangular sensors (and 35mm film).
Not so long ago the standard format for professional film photography was 2.25 inches square - generally known as 'medium format'. I'm not suggesting a digital sensor this large, but a sensor that was, say, about 30mm square would be interesting in a useful kind of way.
You wouldn't need to turn the camera on its side. Just take the full (square) frame and crop to whatever you want later. Or... have a little dial/button on the camera to choose between Square, Portrait and Landscape.
I'm offering this bit of genius to Canon and Nikon for only 1% commission on sales, so if anyone has a nice little place in the Bahamas they want to sell, please let me know.
