What is a 50% size reduction in reality?

Started Aug 18, 2014 | Discussions thread
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tbcass
tbcass Forum Pro • Posts: 23,970
What is a 50% size reduction in reality?

In photography when we talk about a 50% size reduction it is referenced to 2 linear dimensions but this results in a true area size of 25% of the original because 0.5x0.5=0.25 or 25%. This is analogous to saying someone 3 feet tall is 50% the size of someone 6 ft tall and we all know this isn't true. Maybe it's the engineer in me but shouldn't we be more accurate and say a 24mp sensor can produce an image 2x the size of a 12mp one. I know that when I look at an 8x10 print it's no where near half the size of a 16x20 print because it fits in 1 little corner.
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Tom

Look at the picture, not the pixels
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Misuse of the ability to do 100% pixel peeping is the bane of digital photography because it causes people to fret over inconsequential issues.

http://www.flickr.com/photos/63683676@N07/
http://www.flickr.com/photos/25301400@N00/

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