Leica's R series lens

1. It's worth buying. It's hard to say. In terms of cost performance, 35/2.8 is higher and richer than Leica, but its overall three-dimensional sense and magnanimity can almost challenge the legendary 35/ 1.4.

Therefore, it mainly depends on economic strength.

There is no obvious difference, but the square one is a little older. In fact, the R heads are all the same, and the later the traditional taste is lighter, the higher the resolution and clarity are.

3. How many knives means that there are several gaps in the bayonet at the end of the lens, one is a single knife and three are three knives. The more knives, the later the production time.