wunder beta

📘 Focus moves the image plane

Focus moves the image plane

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

The lens
Contrast
Phase
The sensor
The motor
The loop
Low light
Motion
Depth
The result

Questions this course answers

What does autofocus move?

Motors shift lens groups to change image focus.

What does contrast detection seek?

Sharp edges create stronger local brightness changes.

What does phase detection reveal?

Separated views show displacement that indicates direction and amount.

Why can low light hinder autofocus?

Focus algorithms need measurable image information.

What is autofocus fundamentally?

The camera measures, moves, and checks until its criterion is met.

Grounded in trusted sources

[object Object]
[object Object]
[object Object]
[object Object]

Every Wunder lesson is built from real, reputable sources — never invented.

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