Join Ben Long for an in-depth discussion in this video Image sensors and field of view, part of Foundations of Photography: Lenses.
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.…
- 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
Foundations of Photography: Exposurewith Ben Long3h 24m Appropriate for all
Foundations of Photography: Compositionwith Ben Long5h 29m Intermediate
Douglas Kirkland on Photography: A Photographer's Eyewith Douglas Kirkland41m 55s Appropriate for all
2. What Is a Lens?
3. Focal Length, Camera Position, and Composition
4. Depth of Field
5. Choosing a Lens
6. Advanced Autofocus
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