Why is called a constant aperture lens when the photo of the lens shows a range of FStops? Confused? null

Question

SonyListens · Accepted Answer

Hi Ludi,
Sony commitment to customer satisfaction is our top priority.
The SEL2470GM2 lens is marked F2.8 constant-aperture because it can stay constant at its maximum aperture, which is at F2.8 on all focal lengths available on this lens. In comparison, a non-constant lens, like the SEL100400GM, will change aperture whenever you change the focal length. 
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Regards,
Larry 12-15-2023
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BrandonF · Answer

You can stay at a constant aperture throughout the focal length

“Why is called a constant aperture lens when the photo of the lens shows a range of FStops? Confused?”

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