Join Ben Long for an in-depth discussion in this video Auto-focus and live view, part of Photography Foundations: Lenses.
One of the things that's really nice about an SLR is it has a single lens.…That's the SL part of SLR.…What's nice about a single lens is it means that my eye, when it looks…through the viewfinder, is looking through the same lens that's exposing the image sensor.…The image sensor sits right back here, directly behind the lens.…What's nice about that is it means that when I am looking through the…viewfinder, I am seeing the exact same composition that the image sensor is seeing.…I can also see the effects of any filters that I put on the lens.…In general, it's just a better arrangement than having one viewfinder for me and…another one for the image sensor.…
Now, for all this to work there have to be some extra little mechanics inside of your camera.…You may know all this already, but let's take a quick look here.…I am going to take the lens off and what you see here is a mirror.…Now, I had said before, the image sensor sits right back here and that…should make sense to you.…It needs to be directly behind the lens so the light gets through to it, and…
- 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
Photography Foundations: 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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