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All materialsPanasonic and Olympus lens markings
We understand the designations on board optics compatible with Micro 4/3 format cameras
What's in my name? Sigma lens markings
Combinations of symbols in the name of the object reveal most of its secrets
What is the aperture of optics and what does it affect?
Aperture, aperture, maximum relative aperture - in simple words about the main thing
Everything is relative: interchangeable lenses for cameras from third-party manufacturers
Lenses from alternative brands: money down the drain or an increase in image quality?