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Old 09-15-2004, 04:21 AM
Gordo's Avatar
Join Date: Mar 2004
Posts: 206
Default Whats the differnece between f-stop and aperture?

I recently started an Intro to photography course. The first lesson included a discussion on Depth of Field. I decided to take my Digital Rebel out for a series of shots at different f stops. I was looking at the photos and decided to print the f stop and shutter speed on each photo. I opened the EXIF information in Adobe Photoshop Elements and was surprised to see a value for the f-stop and one for the aperture value that were different. I thought that the f-stop and aperture were one in the same, and I would have expected them to be the same value.

If you look at the properties of the file in windows it itemizes an f-number and lens aperture separate, but the values are the same.

Can someone explain the difference between an f-stop and aperture, and why Elements is showing a different value?

Thanks Gord
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