Join Ben Long for an in-depth discussion in this video Focus troubleshooting: What to do when your auto-focus doesn't, part of Photography Foundations: Lenses.
So, I found this landscape shot that I like.…I've got this big wall of fog overtaking the small town here.…Now, what I like about this shot is the big wall of fog.…The problem is the big wall of fog doesn't have any contrast in it.…And the auto focus system in my camera needs contrast to detect focus.…The idea is where there's more contrast, there's better focus.…This is a type of situation you're likely to encounter a lot.…Maybe it's not a crushing wall of fog, but it could be anything that lacks contrast.…Maybe you're trying to focus on something that's just a solid color.…
So, where I am at here is I've chosen to use only my center point auto focus or…the center point of my auto focus.…That point is falling in the middle of the fog.…So, what I need to do to solve this problem--…There are a few different options.…I can put the camera back into auto focus select mode or auto focus point select…mode where it will choose the focus points that it wants.…And hopefully, it will choose one maybe down on the town.…
- 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: Exposure (2010)with Ben Long3h 24m Appropriate for all
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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