Name: TED-Ed】發光的攝影。從相機暗箱到相機手機--伊娃-蒂莫西。 (【TED-Ed】Illuminating photography: From camera obscura to camera phone - Eva Timothy)
Uploaded: 2021-01-14T04:50:07.000Z
Duration: 4 min 50 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

you've got Facebook albums full of photos.

You have photos on your computer desktop,

You see photos in magazines and newspapers,

We take photos for granted in a major way.

that looked exactly like the person or thing

that you were photographing wasn't always obvious.

In fact, in the past, it was a big mystery.

with a single, small hole in one side that let light through.

This would project the image outside into the wall inside.

artists like Leonardo DaVinci used this method

to introduce 3-D scenes onto a flat plane

In 1724, Johann Heinrich Schultz discovered

that exposing certain silver compounds to light

and left marks wherever the light touched.

Essentially, Schultz found a way to record the images

Schultz's images disappeared soon after he had made them.

It wasn't until 1839 that people figured out

how to project images onto light-sensitive surfaces

that would retain the image after exposure,

At that point, it was mostly two inventors

who fought for the best way to make photos.

One was British scientist Henry Fox Talbot,

He developed something called a daguerreotype,

But the daguerreotype could only make positive images

so copies had to be made by taking another photo.

as the first commercially successful photographic process

mostly because the government made it freely available to the public.

getting a picture of yourself would be a snap, right?

This process still required a whole dark room

enormous trailers with all their equipment

To get a good photo, you would have to stand perfectly still

This led to development of inventions like

It's also why you don't see people smiling

so people opted for a straight-faced look.

to try to achieve a dry plate photographic process.

Eastman eventually discovered plastic roll film

that would fit in hand-held, inexpensive cameras.

These cameras sold by the millions under the tag line,

for making photography a universal past time,

even he could not have dreamed of the ways