number of aperture blades a lens has and its effect
Voigtl�nder 90mm and 75mm has uneven aperture blades?
Why are the blades of a lens limited to a maximum aperture? For instance, why can't the blades F/4 lens be extended all the way to 1.4? Would there be any distortions
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Amazon.com: Metal Mirrorless Camera Lens, 12 Aperture Blades 5 Elements in 3 Groups Premium Metal 25mm F1.8 Camera Lens for Z7 for Z50 for Z6(Silver) : Electronics
Lens FAQ: What Are Aperture Blades? How Do They Influence My Photos?