Leica, Zeiss, and Voigtlander have long been three companies that really compete with one another.

I’ve been considering writing this article for a long time: I know it’s information that someone will want. In the battle between Zeiss, Leica, and Voigtlander, it can be tough to figure out which is the best option. There are many different parameters, and you can always consider which one is best for you and your needs. 
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https://www.thephoblographer.com/2020/12/29/leica-voigtlander-or-zeiss-answering-the-questions-you-should-know/