Manual focusing skills

1. Focusing in low light condition

Autofocus rely on light, or enough contrast, www.customcanvasonline.com.au under the condition of insufficient light, contrast decreases, so often cannot AF, sometimes even using the AF auxiliary lamp, also cannot cope with. The image below seems to have enough light, but it was exposed over a long period of time. In such occasions, the picture is often not clear due to the inaccurate automatic focus, and even cannot be focused at all. This often requires visual focus, cheap canvas prints manual focus to deal with.

2. Occasions with insufficient contrast

Sometimes, even if the light is sufficient, if the picture is like a clear color wall, the automatic focus may fail, or lead to inaccurate focus and offset of the focal plane. This is when you have to unscrew the lens, focus with something else, half press the shutter button and come back, or manually focus.

3. When photographing landscape composition

When shooting landscapes, sometimes need to be able to make the overall landscape have clear images, so usually USES a small aperture, make deeper depth of field, and "always" is one of effective method, but if use the af can change the focus area.

Many cameras have a preset focus in the middle of the frame, which requires special attention, especially when it is difficult to focus correctly when trisecting. It can be processed by means of automatic focusing, locked focus decomposition, changing the focus position of the area, manual focusing and so on. And when creative photography is needed, such as autumn leaf close-up, it needs careful control.

4. HDR, color mapping, etc. need post-processing

All common HDR, actually is the synthesis of a few in addition to exposure, other control is exactly the same picture, but if use the autofocus, sometimes may be between each photo in to the focal point is different, which leads to the emergence of the virtual shadow between each layer.

Shoot through glass

Most of the time, you shouldn't shoot through glass, but the truth is that many people have this problem, sometimes by flying or visiting an aquarium. CPL can eliminate a certain amount of reflection, and manual focus can be used to avoid stains on the glass or reflections on the glass, so as to facilitate correct focus.

6. Portraits

Portrait photography is one of the most common subjects, but many people focus on autofocus. Portrait photography is often the most important thing is to shoot the eyes, but with background along with processing requirements, most people would use the large aperture of shallow depth of field, but the focus is often automatically on eyelashes or tip, etc., so that the eyes will become blurred, destroy the reek, thus lost the vitality of the overall picture. Sometimes the portraits require accurate manual focus.

7. Macro photography

Thanks to the shallow depth of field, the aft difficult for camera, even shift focus at any time, manual focus at this time can help you control the image and can achieve more accurate focus. Especially for some special macro lenses, they can be manually operated in real time and fine-tuned by manual on the basis of automatic, which brings great convenience to macro shooting.

By the way, the ability to zoom is not to see the focal length, but to see the magnification of the lens. Canon generally refers to lenses with a maximum magnification ratio of more than 0.5 times as "macro lens". For example, the magnification ratio of Canon sleeve head 18-55 is 0.34. Canon 55-250 magnification ratio the magnification ratio of Canon 70-300 is 0.26. Canon 100 has a magnification factor of 1.

In shooting practice, several points should be noted for manual focusing:

1. When using the manual focusing lens, the camera body with the function of focusing prompt will give the user a reference focusing indicator, and the half-click shutter will also have a closing sound for reference. After focusing, the scene will be clearly displayed on the focus screen, and whether it is clear is mainly determined by people.

2, some of which has the function of full-time manual focus lens is to point to in af, can be the ultimate focus by the photographer at any time, without the need to adjust the automatic and manual button to switch focus mode.

3. If the lens that does not support full time manual focusing is not able to rotate the focusing ring manually in the automatic focusing state, the damping will be significantly damped. Please use carefully to avoid damage to the damping.

4. In shooting practice, especially for long focal length, automatic and manual adjustment can be adopted.

5. In the weak light condition, many lenses will appear "pull bellows", especially the auxiliary head; you may switch to manual try.

Then again, no matter how, autofocus is very convenient, but we should all learn manual focus, under the right circumstances can effectively control the image, as the precise focus, acrylic prints service for creative photography.