Join Ben Long for an in-depth discussion in this video Focal length and aspect ratio, part of Advanced Photography: Medium-Format Digital Cameras.
- A camera lens focuses light onto the…focal plane in your camera, or an image sensor,…or a piece of film is housed.…So, the camera lens gathers light…through it's front opening, and there are a…complex series of groups of lenses.…It focuses that light to project…an image circle at the back of the lens.…Your image sensor crops a rectangular image…out of that circle.…Obviously a bigger sensor crops…a bigger chunk of the circle.…The focal length of the lens determines…how wide a field of view the lens captures,…and we refer to a lens that captures…roughly the same field of view of the human eye…as a normal lens.…
Because different size sensors crop…different size rectangles, what focal length…counts as normal, varies from sensor size…to sensor size.…For example, on cameras with a sensor…that's the same size as a piece of 35 millimeter film,…a 50 millimeter lens is considered normal.…That is, it has the same field of view…as the human eye.…Focal lengths longer than 50 millimeter…are considered telephoto, while shorter than 50…
- SLR and mirrorless design
- Focal length and aspect ratio
- Exploring camera options
- Workflow and tethering
- Shooting with small, medium-format cameras
- Dynamic range and medium format
- Medium format and commercial, architectural, and landscape photography
- Determining if you need a medium-format camera
Skill Level Advanced
1. Medium-Format Basics
2. Medium-Format Cameras
3. Medium-Format Shooting and Noise
4. Medium-Format Applied Uses
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