Camera work...

 f 4.5
1/15 s
ISO 400
35 mm

 f 4.5
1/20 s
ISO 400
35 mm

 f 5.6
1/20 s
ISO 400
70 mm

f 5.6
1/15 s
ISO 400
70 mm








These photos all shoot the same subject: the notice board. However they are quite different as they used different distances and aperture, also the shutter speed. I personally prefer the second photo as the subject occupies suitable and adequate space. It is easy to see the subject and let the reader notice that what are near the subject. It is a medium shot (MS).
The first photo is medium long-shot (MLS). It is quite hard to identity the main subject. The third and fourth are too close to the subject. They lose meaning and they are just like recording things from the notice board. The third one is close-up (CU) and the fourth one is extreme close-up (XCU).
In my opinion, it is hard to shot when the lens is 70mm because it zooms in and I can hardly avoid camera-shaking. I took like 3-4 times and finally got a better photo. I notice that the lens length is very important to shoot a good photo. If it is too far, readers could hardly understand what we are shooting. If it is too close, the quality of the photo may not be good and readers do not enjoy the feeling of no spaces.