Why are lenses round?

I didn't read the entire thread, so not sure if it was mentioned, but cameras would be better with round sensors. Then there would be no such thing as shooting landscape or portrait. You could just shoot, and then decide which way to crop the circle in PP.

Thinking "outside the box"...

It is easier to cut retangular sensors out of a large wafer with little wastage but think how much wastage there would be cutting circular sensors out of a large wafer...

Why do we have wafers with ice cream...?

ValkyrieLenneth wrote in post #10498233
Try to resize a rounded picture Or print it on ... square paper.

Who said we'd have square paper then?

TxDiver wrote in post #10501158
I didn't read the entire thread, so not sure if it was mentioned, but cameras would be better with round sensors. Then there would be no such thing as shooting landscape or portrait. You could just shoot, and then decide which way to crop the circle in PP.

ON the other hand, 95% of casual photographers don't know what cropping is and don't know where to find round paper and frames.

95% of casual photographers never print their camera phone snaps at all.

Lowner wrote in post #10501441
95% of casual photographers never print their camera phone snaps at all.

But how many camera phones have round screens?

Canon will move to a square sensor in it's high end cameras for this exact reason. Then you won't have to worry about portrait/landscape positioning of the camera.

Hardcore wrote in post #10501497
Canon will move to a square sensor in it's high end cameras for this exact reason. Then you won't have to worry about portrait/landscape positioning of the camera.

many Canon lenses have a rectangular baffle in the rear that would make this a problem.

krb wrote in post #10501524
many Canon lenses have a rectangular baffle in the rear that would make this a problem.

Some even have them in the front. Not to mention all the petal hoods would start vignetting on the top and bottom.

Jonathan.kichizi wrote in post #10499613
Actually, I think chips are cut out of round silicone wafers... honestly, I saw that somewhere.

You are right.

Chips are manufactured on round silicon wafers, individual components are cut from the wafer.

I used to work for a company that made their own chips.

The process is somewhat amazing, and totally photographic in how it is done.

You've heard of double-exposures, well to make some chips can take up to 26 photo exposures on one round wafer. Some took less others could take more. Depends on what you are making.

When I last did that work the yield rate was something like 50%, this mean 50% of the components from a single wafer FAILED.

try doing any classical composition inside a round shape and you'll find that when cropped, it won't have the same spread, ie rule of thirds etc

You wouldn't have to worry about a square lens rolling off the table.

so howcome tv/movie cameras have square lenses? http://www.google.co.u​k …gSfg42VBA&ved=0​CD4Q9QEwBA

That's just a square housing around the lens.

so why cant we have square hoods instead of petal shaped hoods on wide lenses