A lens is a cylinder. It's round.…There's a lot of complicated topics in photography so I thought would really revel in…this simple one for a moment.…Anyway light comes in the front of your lens.…It gets focused by the lens and is projected out the back.…Thanks to the physics of optics, the image gets flipped upside down in…that process, but because your lens is round it projects a round image out its backside.…The sensor in your camera though is rectangular, so it crops a rectangular image…from that circle that your lens projects.…
Now think about what happens if you change the size of that rectangle.…A smaller rectangle is going to crop a narrower image, meaning one with a…narrower field of view.…In other words, the same focal length will deliver a different field of view…depending on the size of the image sensor in your camera. Because that image…sensor is going to crop a narrower or wider part of the image.…Earlier we explained that a lens with the same field of view as the human eye…is considered a normal lens.…
Author
Released
2/11/2011- Understanding field of view and camera position
- Depth of field and lens choice
- How to choose a lens
- Examining lens features
- Using specialized lenses such as fisheye and tilt/shift lenses
- Focusing techniques
- Using filters
- Camera maintenance
Skill Level Beginner
Duration
Views
Related Courses
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Photography Foundations: Composition
with Ben Long5h 29m Intermediate
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1. Introduction
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Welcome1m 19s
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Who is this course for?1m 34s
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Why does the lens matter?2m 36s
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Changing lenses3m 43s
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A word about camera brands1m 53s
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2. What Is a Lens?
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What is a lens?3m 51s
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Field of view2m 36s
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Focal length multipliers5m 42s
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Primes and zooms2m 2s
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3. Focal Length, Camera Position, and Composition
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Shooting wide7m 2s
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Shooting telephoto8m 9s
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Focal length applications1m 59s
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4. Depth of Field
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Depth of field (DOF)5m 3s
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DOF and sensor size1m 50s
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DOF and background size2m 5s
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5. Choosing a Lens
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Choosing a lens7m 11s
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Image quality4m 10s
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Lens features6m 42s
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Size and weight6m 29s
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Specialty lenses5m 9s
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Where to buy2m 54s
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Lens caps1m 28s
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6. Advanced Autofocus
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Focus point selection5m 54s
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Center-point auto-focus3m 51s
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Servo focus3m 46s
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Filters5m 46s
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Auto-focus and live view5m 2s
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7. Conclusion
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Maintenance14m 40s
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Micro-focus adjustments1m 31s
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Goodbye59s
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Video: Image sensors and field of view