Monday, November 03, 2008

Random Question: Camera lenses

Since a camera has a round lense, why are the photos it produces rectangular in shape?

Shouldn't they be the same shape as the lense?

Tori

11 comments:

Intense Guy said...

*Laffs at the goofy one*

I suspect that pictures are rectangular since the film is (well, was anyway) that way. Of course cutting apart pictures when they process them is easier with straight cuts too, not to mention storing them away.

But if you had round film - you can take round pictures.

Tori_z said...

But how does a round lense take a rectangular picture? I mean, the lenses on digital cameras are round, and there's no film in them... So why do the pictures still come out rectangular?

The Wife O Riley said...

That is a question for the ages! I never understood it myself.

Thanks for stopping over, I love your blog and definitely will be back!

Tori_z said...

The Wife O Riley:
Thanks for stopping by. I'm glad you like my blog... You've got a great blog yourself. ;)

ChicagoLady said...

That is a very good question! Since I also didn't know the answer, I looked it up at ask.com. Here is what I found:

"I don't know about digital cameras but in a camera using film the portion of the camera that holds the film against the back inside wall,directly behind the shutter is square. Open the shutter and the area is flooded with light. The only portion of the film exposed to the light is that area of the film inside the square."

I think what this all means, is if the lens were square or rectangular, it wouldn't allow for focusing or zooming in. Being round, allows for that.

ChicagoLady said...

This website has a bunch of pictures to show what he's talking about, but perhaps you can understand it, just by reading it.

http://www.digitalartform.com/lenses.htm

LadyStyx said...

What a neat question. Maybe it works that way in the digitals as well Chicago. Since the part letting the light in is square then that's how it gets saved to the disc?

Tori_z said...

Chicago:
Thanks... Makes sense!

Styxie:
Yeah, that sounds about right...

KAYLEE said...

i sent you an wmail back hon! LOVE YOU! if i dont get back here hugs to you while you are in the hospital!

Tori_z said...

Kaylee:
Got your e-mail. *hugs*

William said...
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