…slight QC differences in coatings, age, and a variety of other factors. In order to minimize these performance differences, operators often try to get sets with very close serial numbers, ensuring they were made at a similar time. You can find a list of Leica serial numbers and years here. It should be noted that even though the lenses were made in the same year, this does not 100% ensure equal performance, and thorough testing should be undertake… Continue Reading
