What are the ways to use a small spittoon?

1.8,

The focal length can't be adjusted, just 50 focal lengths, which are fixed, so it's called a fixed focal head.

The maximum aperture is 1.8, but it is better to shoot two apertures, but 1.8 is also ok.

Generally, when playing with blurred background, the large aperture near 1.8 is used to highlight the theme and blur the mess around, so that amateurs can clearly feel their professional achievements, that is, the large aperture is used to blur the background and is used more when taking portrait photography.

The set uses a small aperture.

Usually, you just need to use autofocus.

Auto focus can't be used when shooting some special objects, so consider manual focus.

"Fixed focus without weak travel", the picture quality is good, and using fixed focus will be addictive.

"Fixed focus composition basically depends on walking". The focal length can't be changed, and you need to walk back and forth to complete the composition, so this is a tripod head for practicing photographic composition.

As for the 70D, Canon's mid-range SLR has just come out, which is good. Have fun. If it's your first contact with SLR, I suggest you buy a book to read. A thick big book. It's best to write a book for the 70D player, it's best.

It is recommended to start with the aperture priority mode AV mode, which can be used in most scenes. P-file is used only a few times, but in the learning process, AV mode is better. If AV is proficient, TV mode will naturally. AV is used professionally. If you find that some lighting effects are not good, you will naturally use M-file full manual mode.

Japan's SLR is very real, and it won't break down in normal use.

Pay attention to moisture-proof when placing it at ordinary times. Lenses are afraid of moisture and will get moldy. You can put some desiccant around the machine, that is, a small bag with food in it.