/p/ - Photography » Thread #2693538

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290KiB, 1920x1080, 1920_barry-lyndon.jpg

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Anonymous Wed 28 Oct 2015 09:13:59 No.2693538 View Reply Report Delete

Quoted By: >>2693543

whats the lowest possible f-number?

pic related

Anonymous

Anonymous Wed 28 Oct 2015 09:17:14 No.2693543 Report Delete

Quoted By: >>2693559 >>2693560

>>2693538
theoretically 1:0.3535, practically 1:0.75

Now go be edgy somewhere else.

saged

Anonymous

Anonymous Wed 28 Oct 2015 09:27:27 No.2693556 Report Delete

Quoted By:

How many worthy photographs does this flick have?

Unsage xD

Anonymous

Anonymous Wed 28 Oct 2015 09:31:06 No.2693559 Report Delete

Quoted By: >>2693566

>>2693543

The fastest lens that can operate in air should max out at around f/0.5, if you want to get higher values, the lens needs to be submerged.

Anonymous

Anonymous Wed 28 Oct 2015 09:31:33 No.2693560 Report Delete

Quoted By:

>>2693543
>theoretically 1:0.3535

I assume that's 1/2*√2?
How do they arrive at that number?

Anonymous

View Same Google ImgOps iqdb SauceNAO Chipmaker.jpg, 55KiB, 475x306

Anonymous Wed 28 Oct 2015 09:39:40 No.2693566 Report Delete

Quoted By:

>>2693559
They do that to fabricate computer chips.
To improve the resolution. (wavelength, f-number and refractive index of the medium are the three key factors determining resolution)

I wonder what the f-number is on those machines.

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