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

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• 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. For any questions or concerns, you can reach us at 239-245-6360.   Regards, Larry 12-15-2023 Sony Social Support

  Answered by SonyListens 2 years ago

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• You can stay at a constant aperture throughout the focal length

  Answered by BrandonF 3 months ago

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