F-stops Explained

[Bitter Jeweler]

 

[bigtwinky]

The exposure on that eagle seems a bit low Bitter

 

[NickStevens]

I think my head just exploded, far too much thinking for this time of the night/morning :madmad:

Night people

 

[Josh66]

You've managed to take TPF to an incredibly and dismally new low.

So many things I want to say about that, but I won't because it would probably mean a ban (nothing about you, Sparky - believe it or not, we might actually get along 'in the real world')... I agree that TPF is at a low point, but I think you give me WAY too much credit to say that I have any part of it.

 

[Bitter Jeweler]

The exposure on that eagle seems a bit low Bitter

 

[bigtwinky]

BWAHAHAHAHAHA :lmao:

 

[laynea24]

I thoroughly enjoyed reading this and learning! Thanks.

 

[dmunsie]

"1, 2, 4, 8, 11, 16, 32, 64, 128, 256, 512.

Save for the first digit (1), each number is twice that of the number to it’s left."

I was right there with ya, till I got to the 11.

 

[480sparky]

"1, 2, 4, 8, 11, 16, 32, 64, 128, 256, 512.

Save for the first digit (1), each number is twice that of the number to it’s left."

I was right there with ya, till I got to the 11.

Corrected!

 

[ChrisCalvin]

Thanks, useful info.

 

[Tiberius47]

I gotta agree that the OP makes it needlessly complicated.

It's like this...

The F stop refers to the size of the hole that the light goes through. Being a hole, it has two dimensions - height and width.

If you take any shape and enlarge it so it becomes 1.4 times as wide and 1.4 times as high, then it's area will roughly double. So, for example, you can have a square that is 1 foot wide by 1 foot high, and it has an area of 1 square foot. If you want to have a square with an area of two square feet, you can't just double the width and height - then you get four square feet. Instead of multiplying the dimensions by 2, you multiply them by 1.4. A square that is 1.4 feet by 1.4 feet is about two square feet in area.

And if you have a hole that is letting light through, and you increase its size by 1.4 like this, then it will let about twice as much light through. In other words, it lets in an extra stop of light.

And that's why we use that progression of numbers in f-stops.

Easy.

 

[NickStevens]

I gotta agree that the OP makes it needlessly complicated.

It's like this...

The F stop refers to the size of the hole that the light goes through. Being a hole, it has two dimensions - height and width.

If you take any shape and enlarge it so it becomes 1.4 times as wide and 1.4 times as high, then it's area will roughly double. So, for example, you can have a square that is 1 foot wide by 1 foot high, and it has an area of 1 square foot. If you want to have a square with an area of two square feet, you can't just double the width and height - then you get four square feet. Instead of multiplying the dimensions by 2, you multiply them by 1.4. A square that is 1.4 feet by 1.4 feet is about two square feet in area.

And if you have a hole that is letting light through, and you increase its size by 1.4 like this, then it will let about twice as much light through. In other words, it lets in an extra stop of light.

And that's why we use that progression of numbers in f-stops.

Easy.

Yes, I think lol

Thing is does it actually make any difference to any of us why the numbers are the way they are?

As long as we remember the numbers then I can't see it matters to much.

UNLESS Im missing something glaringly obvious?

 

[O'Rork]

It appears to me we have all been cooped up by winter long enough. Hey I'm fighting a squirrel! And it looks like I'm winning.

6 of 1 is half a dozen of another.

You can turn left or you can take 3 rights.


If you adjust by full stops you're going to half or double appreciated light. < Now wasn't that easy?


The above are true. What's below is an opinion.

You can pick your friends and you can pick your nose, but you can't pick your friends nose.

 

[Blitz55]

Good info in this thread. Thanks for the posts.

 

[pixmedic]

that was an awesome read sparky!
honestly though....I originally clicked on it because i THOUGHT it said F-Bombs explained....
still a good read. thanks!