Steve Jolly wrote:

Toralf Lund wrote:

Since the "full-frame" discussion re-emerged yet another time earlier today, I thought maybe I'd ask, how about a 36x36 mm sensor? Wouldn't that be the "ultimate" size for a 35mm body and lens? I mean, the elements being circular, surely the lens should handle the same size along both axes?

Of if you simply like rectangles, how does 31 x 36 sound? (Same ratio as 6x7, more or less...)


36x36mm would be too large for the image circle of a lens designed to cover 36x24mm - 30x30mm would work though.

Yeah, I guess I was looking at this the slightly wrong way. Obviously you may have to make the area narrower as it gets higher to be able to keep the corners inside the circle. So even though a height of 36mm should be possible, you can't keep the width at the same size. Of course, 24mm wide and 36mm high, instead of the other way around, would work. And you'll also get the largest possible area with a square, won't you? (It's been a long time since those geometry classes...) Also, 30x30 might be a quite interesting format...


You could get better performance than a 36x24mm sensor for crops "squarer" than an aspect ratio of 5:4, but you'd lose quality for anything wider than that.

S


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