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What's the difference between Leica Bayu glasses version and glasses-free version?
The difference between Leica Bayu glasses version and glasses-free version is as follows.

1, Bayu (also known as Bajie) is the first generation product of M35mm/F2, which was first given by the Japanese. The meaning is simple. It consists of eight lenses, and because it is as poor as a precious work of art and beautiful jade, it is called Eight Jade.

2. Eight versions of jadeite glasses were produced, so that M3(50/90/ 135) had a 35mm viewing frame.

3. Eight jadeite glasses-free versions were produced for M2.