ButchS wrote:
Camera f-stops are based on the square root of 2. To go one stop slower, you multiply by 1.4 (the sqrt of 2, rounded off). To go one stop faster, you divide by 1.4.
Common “fast” 50mm lens is f/1.4. One stop faster=1.4 / 1.4=f/1.0. Going one more stop faster=1.0 / 1.4=f/0.7.
So, f/0.95 is so close to f/1 to be considered as f/1.
Why are fstops based on the square root of 2? Because to double the area of a circle you multiply it by the sqrt(2). When applied to the ratio of 1:f, you reverse the usage of division/multiplication.
I’m afraid you left me in my Circle of Confusion. LOL
1x1.4=1.4, 1.4x1.4=2, 2x1.4=2.8, 2.8x1.4=4, 4x1.4=5.6, 5.6x1.4=8, 8x1.4=11, 11x1.4=16... is this sequence starting to look familiar?
Camera f-stops are based on the square root of 2. ... (
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