Price relationship~ I bought Tamron’s A14, but I had no choice but to enjoy the remaining little luxury.

First I want to ask about sharpness, dispersion, bokeh, and bilinearity~

This question is so difficult to answer, it’s too scientific, haha

Let me briefly talk about my own views

1. The problem of dispersion

Chromatic dispersion, called Chromatic Aberration in English, means that light of different wavelengths has different focusing locations after the lens lens converges. In this way, when imaging on CMOS, some colors will be more concentrated and some colors will be more divergent. This is the so-called dispersion phenomenon. Dispersion is unavoidable and can only be reduced. Many current lenses, especially high-end lenses, use low-dispersion glass to reduce its impact.

2. The problem of sharpness

This is somewhat similar to dispersion, that is, when multiple rays of light from different directions emitted from the same point of the subject converge, theoretically it should be the same point on the film, but due to the lens There are bound to be more or less errors in processing. When converging, it can only be said to be within a certain range. There are also certain errors, which also brings about the problem of sharpness. The narrower the range of convergence, the sharper it will be. The higher it is

As for eye problems, let me sort out the information first