Master my lens problem, about some lens problems

Sweat.. What questions are not written.

The small focal lengths you said are all wide-angle, as for why there are so many differences, it is because their structure and lens composition are different, and the imaging effect is also different. The 10-18 and 12-24 you are talking about are ultra-wide-angle lenses (commonly known as fisheye lenses), which can shoot a wide range of landscapes, which is definitely a landscape weapon (but with a small deformation).

In addition to the focal length, there is also a hard parameter of the lens is the size of the aperture, the larger the aperture (the smaller the value), the higher the **, but there are many more cases that can be shot, and there can be a charming background blur effect.

So if you don't want to pursue image quality, you can get the focal length right. For example, the large and small sets in the set, buy these two, and the focal length will be the same, or buy a 18-250 directly, a lens will include the commonly used focal length, but the image quality is average, but the picture is convenient.

A master still has to be able to tell hexagrams? Otherwise, this question.

I'm also a novice, and the small focal length is for still life, and there are even prime lenses. Photography is a thing, equipment is only one aspect, the key is to see how you feel, some people like to pursue the taste of lomo, see the wisdom. However, photography is indeed an amateur industry.

Hope these are helpful to you.

The parallel optical axis of the "parallel lens" will be on the same horizontal line.

"The direction of the axis of sight of the lens is basically parallel or coincides with the direction of the axis of the person, and it is a synchronized (shifted) axis.

Happy to you!

It doesn't make much sense for you to understand these lenses, these are all lenses from film cameras back then. Today's digital cameras can be used for post-production, and the effect of these expensive lenses can be achieved.

It refers to the maximum aperture value of the two focal lengths at 18mm and 135mm, and the smaller this value, the larger the aperture value.

2.When shooting portraits at night, the first thing to consider is the light sensitivity setting, shutter setting, large aperture, and the sharpness is not necessarily high, that is to say, it is not necessarily clear, when the shutter is lower than 125, you should also consider the bracket, and the stabilization can only be reduced.

3.The DSLR has a larger sensor than a card, so the effect is much better at night.

First of all, it is not that the larger the aperture, the better the image, but that the larger the aperture, the more expensive it is.

SLR lenses are also divided into three, six, nine, etc., and the aperture is naturally big for small-aperture telephoto zoom, but the header is easy to do f2 or even.