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All materialsWhat's in a Name? Sigma Lens Labeling
The combination of symbols in the lens name reveals most of its secrets.
How does autofocus work?
When it comes to focusing on sharpness when taking photos and videos, automation can be fully relied on
What is the aperture of optics and what does it affect?
Aperture, aperture, maximum relative aperture - in simple words about the main thing
Nikon lens markings
The symbols in the long name of the object will tell you almost everything about it