7 strokes to teach you to focus and composition

(a) First understand what is the "actual focal length"

If you are careful when buying a camera, you will find that some of the specs on the site will indicate "18mm (the actual focal length 28mm), and so on, because the true focal length of the lens will be affected by the size of the sensor, look at the following table:

The lens shows the actual focal length

Total Film width (1x) Actual focal length

Aps-c (1.5x) actual focal length

M4/3 (2x)

18mm18mm27mm36mm

50mm50mm75mm100mm

200mm200mm300mm400mm

This shows that if you are using the whole piece (FF) of the 18mm lens, on the APS-C camera will become 18x1.5 = 27mm Vision! This is not widely available when taking wide-angle photographs, but it is more advantageous in telephoto (200mmx1.5 = 300mm).

　　

(b) The wide-angle lens can contain more scenery

Wide-angle lenses are more visible because you can shoot more scenes so that you can use them in a wide range of scenarios or on the spot for too much. However, when using wide angle, be careful that there are too many elements in the photo, which makes the photos messy and lacks focus.

　　

A wide-angle lens can take a large range of photos.

(Nikon D700 f8@16mm)

(iii) Long Gio can rule out the elements

Long Gio shot out of the narrow view, the photos will not contain a wide range of scenery, excluding the elements, so that readers can focus on the same thing (the protagonist), suitable for shooting close-up photos, or when the background is very messy to use.

　　

Use the 200mm telephoto to exclude unwanted items (such as extra sky) from the photos.

(d) Wide-angle lens to take deep depth

To take a shallow depth of view (after the mask) there are 3 elements, one of them is "focal length", the longer the focal length, the easier it is to produce a shallow depth of the image, so if you use a wide-angle lens, the focal length is very short (for example, 16mm), then even if you use a large aperture (for example, f/2.8), just carefully select the focus Away from the camera, the photos will also have a deep depth of field, all the scenery will be clear and sharp, suitable for shooting a wide range of scenery.

　　

If you want to have a full picture also clear, you can use the small circle plus wide-angle shot.

(Nikon D700 f/8@16mm)

(v) long Gio to take a shallow depth of view

On the other hand, if you use a long Gio (such as 200mm), even if your aperture becomes smaller (such as F/8), the photo can easily produce shallow depth, so you need to be careful about the depth of the fields when using a long focal length, and because it's easy to have a shallow depth of view, long Gio is also suitable for shooting close-up, portrait and other subjects. However, when hand-held use to watch the safe shutter, so as to avoid the photo due to the hand shock blur.

　　

On the other hand, if you use a telephoto such as 200mm, you can take a shallow depth of the effect.

(Nikon D700 f/4@200mm)

(vi) Wide-angle lens exaggerated space sense

In addition to maintaining deep depth of field, one of the features of wide-angle lenses is to exaggerate the sense of space, make "far things become smaller, near things bigger", will also produce exaggerated deformation, we can take advantage of these characteristics, we will be able to take a more tensile photos, is the scenery photography, building shots commonly used lens types.

　　

Use the 16mm wide-angle lens to take pictures of tension.

(vii) long Gio compression before and after the scene

With a telephoto lens, there is another important feature in addition to the shallow depth of view mentioned earlier: " Compress front and rear view ", in the telephoto lens, the background and the protagonist's size and distance will be reduced, compared to the use of wide-angle lenses, distant scenery no longer become a little bit, but become larger and look closer to the protagonist, so that the overall picture also become rich close up, you should use more students.

　　

Columns that are separated by a distance are also compressed and become more compact because they use a 200mm focal length.

Postscript

Beginner photography Students must clearly understand the above knowledge, so that when the actual shooting can be more clear what the effect they want, and will not spend money wrong to buy the focal length of the lens!

The introduction of photography is actually very simple, but the world of light and Shadow is very wonderful, let countless people chasing and love, back on camera, to take the most beautiful moment. Photography actually brings us a kind of pursuit of a beautiful life, because want to film more beautiful, so will go to explore and search. The above is a tutorial network small series for everyone carefully collected content, hope can be a beginner photography friends benefit Oh.