How to Memorize the F-Stop Scale, Easily

An f/1.4 lens lets in 4x more light than an f/2.8 lens—because the aperture is bigger by two "stops." In video and photography, knowing how to understand stops on the f-stop scale turns those numbers on your lens into useful information.

[Robski]

probably the most valuable one minute and forty four seconds on YouTube

[nhaatty]

I was having such a hard time memorizing these and you just blew my mind.

[ColtStone]

Great video, Mr. Hammond!
Clear, concise, and informative!

[suhauluckesik]

Simplest yet most effective explanation on the web. Thanks a lot.

[PrasadKannansaivam]

Simple and make everyone understand thank you Griffin..
when you are going to video for F-stop Vs T-stop...

[SirRelith]

Is it technically 11.2 and 22.4 then?
Do they just leave off those decimals for ease of use?

[gman]

5.6x 2 =11. 2 wonder why this on was rounded down

[arky_tech]

Wow... I've seen those numbers for years.. and never saw the pattern.. Thanks, Griffin Hammond!

[cralwar]

still THE BEST explanation on youtube !!

[RobbyHuang]

That's super helpful! I'm curious thogh, what about stuff like 1.8?

[Pitagyros]

Why nobody told me like that. We live great times because we can get great value from great people !

[aHondaaa]

The easier method is to live in agony over the F-Stops that you're unable to achieve because you can't afford the nicer lenses that go below the stock of 4.0

[ThomMJMoore]

BEST. VIDEO. EVER. (Y) So simple, but effective!

[Isaypreach]

Soooo how would I apply this knowledge in using strobes? Like i know i wanna shoot at f 7 and my stobe is at 1/16 what do i do

[ronjohnson]

Griff I love your videos, I have learned a ton. Can you explain prime lenses. Just when I think I have it I see something totally opposite. You had recommended an 11mm prime lens on an earlier video fro shooting real estate but I can't seem to find one anywhere.

[ThatDoe]

Thank you! Our photography professor expects us to remember this.

[jipsee]

Wow this is so simple (once explained) yet so so so NOT obvious until pointed out! HAHA Thank you so much!!! :D

[IMDABROWN]

Holy bananas, I see the light. Great explanation.

[bay]

The most value I've ever got from a 2-minute video. The best 2-minute video I've watched in my career as a photographer

[futuresdojo]

1:05 - My question is if going from 1.4 to 2 is half as much light, and then going from 2 to 2.8 is half as much light again, how is it possible to have 4 times the reduction if between 1.4 and 2.8 you showed us there are two 1/2 reductions (2 halves make 1 whole). So, wouldn't the reduction be 1x the reduction as opposed to 4 times? Or are we missing the explanation of what you actually mean when you say "half as much light"?