sensor sizes at DVinfo.net

Ali Husain · June 8th, 2007, 12:10 PM

is this information correct?

http://www.dpreview.com/news/0210/02...ensorsizes.asp

somehow i'd always thought that 2/3" or 1/3" was the horizontal width... so 2/3" was roughly 16mm. wow, these sensors are truly tiny!

Bill Koehler · June 8th, 2007, 01:15 PM

You are not alone.

My assumption had been that it was the diagonal measurement,
similar to a SLR's 35mm diagonal measurement of the negative.

Stu Holmes · June 8th, 2007, 01:33 PM

No no. The 1/3in stuff is *not* a diagonal measurement of the sensor. Its an ancient way of specifying sensor size.

And also the 35mm in SLR film cams is not the diagonal. It's simply the width of the film that passes through a film cam - it's 35mm exactly wide.
The size of a frame of 35mm is 24mm (high) x 36mm (wide).

June 8th, 2007, 12:10 PM	#1
Ali Husain Regular Crew Join Date: Oct 2005 Location: San Jose, CA Posts: 141	sensor sizes is this information correct? http://www.dpreview.com/news/0210/02...ensorsizes.asp somehow i'd always thought that 2/3" or 1/3" was the horizontal width... so 2/3" was roughly 16mm. wow, these sensors are truly tiny!

June 8th, 2007, 01:15 PM	#2
Bill Koehler Major Player Join Date: May 2007 Location: Alpharetta, Georgia, USA Posts: 760	You are not alone. My assumption had been that it was the diagonal measurement, similar to a SLR's 35mm diagonal measurement of the negative.

June 8th, 2007, 01:33 PM	#3
Stu Holmes Major Player Join Date: May 2005 Location: Europe Posts: 844	No no. The 1/3in stuff is not a diagonal measurement of the sensor. Its an ancient way of specifying sensor size. And also the 35mm in SLR film cams is not the diagonal. It's simply the width of the film that passes through a film cam - it's 35mm exactly wide. The size of a frame of 35mm is 24mm (high) x 36mm (wide).