I don't know if someone has dedicated himself to doing a study on the average number of errors that we need as photographers to learn photography , how many millions of catastrophes, of useless photos we have had to shoot until we start to get better images, photographs without errors, how many until we are able to anticipate ourselves and solve them before they appear. And in that hypothetical study, it would also be interesting to know how many of those are focus errors. I am convinced that focusing errors would occupy a not inconsiderable percentage of the overall. Because the focus error is the one that will most certainly send our photo to the trash.
Luckily, almost everything in life has a solution, and focus was not going to be any less ? We are going to see the most common focus errors and how to fix them. And if you want to deepen the focus in photography, do not miss this mega guide that we have prepared for you so that you learn to focus well.
- Focus and reframe
- Darkness
- lack of contrast
- Reflexes
- depth of field
- Pictures
- Minimum Focus Distance
- Motion
- Forget Manual Mode
- Defocused center of interest
- Not harnessing the magic of blur
CAMERA SETTINGS
Before talking about focus errors, it is very important that you know what types of focus there are and what they are used for. So you can choose one or the other depending on the situation in front of you. These are the most common types of focus in SLR cameras:
AUTO FOCUS TYPES
- Single AF or AF-S: For non-moving subjects (adult portraits, landscape, architecture, etc.)
- Continuous AF or AF-C: For moving subjects; (the camera maintains focus once we have told it where to focus; it 'chases' the subject)
- Automatic AF or AF-A: The camera changes from Single to Continuous if the subject we have decided to photograph begins to move.
FOCUS AREA
Likewise, there is the focus area , which is nothing more than indicating to the camera where we are going to place the focus; at a very specific (unique) point; at that particular point and in the area around it (dynamic), and so on. In general, it is recommended to use the single point for objects or people that are not moving, and the dynamic for moving elements (sports, children, etc.).
FOCUS POINTS
Each model has a specific number of focus points that help us focus the image. The simplest have less, and as the camera becomes "professionalized", these increase to cover as much of the frame as possible. Most amateur cameras start with 9 focus points, which is more than enough to cover the focus of the image and help us preserve the frame.
After this quick review, let's say you have your camera set up perfectly, this will greatly reduce errors, but unfortunately you're still not safe ? Let's move on then, looking at a few "typical" focus errors:
1. FOCUS AND REFRAME
Well, it seems very logical, right? We have all done it a thousand times, but sometimes it goes well and many others inexplicably wrong. This "inexplicably" focus error is called parallax error and is explained in the following image:
By reframing the image , the focal length changes and therefore the place where the focus was originally focused. This is especially noticeable when you work with shallow depths of field ( wide-open f/1:4, F/1:8, etc.)
2. DARKNESS
You will have already noticed that if the camera "does not see" it goes a little crazy looking for the focus. The best thing in these situations is to give it what it asks for (more light). If this is not possible, you will have to help her find the focus. You have several options:
- Make sure that you have activated the focus assist light that is integrated in your camera, it is very useful to help you focus in low light situations.
- Help yourself with a flashlight or a laser pointer, etc. to indicate the point where you should focus. Then lock focus and shoot.
- Focus in manual.
3. LITTLE CONTRAST IN THE IMAGE
Most cameras focus by contrast, either tones or textures, so if they find a scene with very low contrast , finding the focus can be especially difficult. For example, imagine a light brown lizard in the middle of the desert sand... Just as it is difficult for you to catch a glimpse of it, the same happens to your camera.
To do this, you only have two options, either you look for a scene with higher contrast (you change the background or the subject) or you focus manually .
4. REFLEXES
Another situation where the autofocus of your camera can feel somewhat lost, is in reflections. Lights, shapes, glass in between, clouds in a puddle...
- Look for an area of the image with good contrast to make it easier for you to find the focus.
- If you have light, you can try to focus close to where you want and increase the depth of field to have everything in focus.
- Manual focus.
And you know, if you liked it, it was useful to you and you think it might be useful to someone else, please share (Facebook, Google+ or Twitter) ? Thank you very much!