Join Ben Long for an in-depth discussion in this video Lens features, part of Photography Foundations: Lenses.
In addition to quality differences, some lenses will have more features than others.…Now quality should be your main selection benchmark, but you want to pay…attention to other features as well.…I've got a couple of zoom lenses here and there is an important difference in…the way that they zoom.…This lens has an internal zooming mechanism.…When I turn the zoom ring, you don't see anything happening outside the lens.…If I look inside though, I see all sorts of lens elements and things moving around.…This lens has an external zoom mechanism.…When I turn the zoom ring, the lens gets physically longer and shorter.…
Now you now think that is much of a big deal and it may not be, but if you spend…the lot of time in foul weather and rough environments, an external zooming…mechanism like this could begin to wear out quicker, because dust and stuff can…get on here and actually be carried down inside the lens mechanism.…So an internal mechanism is definitely more durable and long-lasting than…an external mechanism.…
- 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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