Do *you* understand ISO?

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From: minutephysics
Duration: 11:36
Views: 486,712

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This video explains how ISO is very different to what most people imagine, and how you can use this knowledge to take less noisy photos!

REFERENCES
- Sensor Analysis Primer: https://www.photonstophotos.net/GeneralTopics/Sensors_&_Raw/Sensor_Analysis_Primer/Photographic_Dynamic_Range_Shadow_Improvement.htm
- Image sensors explained: https://www.canon-europe.com/pro/infobank/image-sensors-explained/

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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Created by Henry Reich
Produced by Joshua Chawner

Chapters
0:00 Misunderstanding ISO
1:54 ISO Explained
3:20 Why Even Have ISO?
4:52 What Actually Creates Noise
7:12 ISO Step-by-Step Guide!
8:36 Sponsor Message from FarmKind
9:43 ISO Caveats

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jlvanderzwan
2 hours ago
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TL;DW: in most cameras increasing the ISO setting works by pre-analog-to-digital voltage amplification, so using it should introduce less noise than digital brightening after the fact would. What this really means is that https://en.wikipedia.org/wiki/Exposing_to_the_right should also include increasing ISO if increasing aperture or exposure time won't cut it in the context of the picture you're taking.
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The Weather Equation - Numberphile

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From: Numberphile
Duration: 44:12
Views: 22,136

Chief Meteorologist Dan Harris discusses (at length) one of the most famous equations in weather forecasting - the Quasi Geostrophic Omega Equation. More links & stuff in full description below ↓↓↓

Catch our podcast with Dan on podcast players or here on YouTube - https://youtu.be/lnARyhaqMvU

Dan works for the Met Office as a chief meteorologist - https://www.metoffice.gov.uk/

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Navier-Stokes Equation video - https://www.youtube.com/watch?v=ERBVFcutl3M

Dan's website - https://www.roostweather.com/

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NUMBERPHILE
Website: http://www.numberphile.com/

Video by Brady Haran and Pete McPartlan

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jlvanderzwan
1 day ago
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I gotta hand it to the meteorologists, "the Quasi Geostrophic Omega Equation" is a top-tier name for an equation
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Cyborg Therapy

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Cyborg Therapy

And more therapy.

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jlvanderzwan
1 day ago
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Is this an AI psychosis joke?
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Girl Genius for Monday, March 16, 2026

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The Girl Genius comic for Monday, March 16, 2026 has been posted.
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jlvanderzwan
4 days ago
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Never seen a monster with six eyes do the "Pixar face" before
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Mouse

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jlvanderzwan
4 days ago
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https://www.youtube.com/watch?v=lKMD4t2Dbl8
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Irregular Webcomic! #3062

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Comic #3062

You've probably seen the famous Flammarion engraving (even if, like me, you didn't know what it was called until just now). The interesting thing about it is that nobody knows where this image came from. Its first known appearance is in Camille Flammarion's 1888 book L'atmosphère: météorologie populaire, but Flammarion does not credit an artist and the source of the image remains unknown.

It is not, as is often claimed, a medieval work, but one of approximately the same age as Flammarion's book. It's possible that Flammarion produced the image himself, having engraving skills, though there is no solid evidence either way.


2026-03-14 Rerun commentary: The Flammarion engraving is an example of a wood engraving, which is similar but different to a woodcut. Both involve cutting grooves into a flat piece of wood, then rolling ink onto the raised surface and using it to stamp the image onto paper. The only difference (as far as I can tell) is that a woodcut is carved into the side grain of the wood, such as a standard slab of wood you might see, whereas a wood engraving is carved into the end grain. Woodcuts are very old, some dating back almost 2000 years, but wood engraving was supposedly only invented in the 18th century. It has some advantages because the end grain results in sharper lines that can hold more detail.
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jlvanderzwan
6 days ago
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Huh, I actually didn't know where that image came from. Wild how such a famous work of art has unknown authorship
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