“If I use this on a full frame camera (e.g. Sony A7 IV) what is the 350mm equivalent to? I have seen people talk about 'equivalent' reach when using an ASP-C lens on a full frame camera, but I've never understood it.”

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• Hi Dennis, Sony's commitment to customer satisfaction is our top priority. The lens 350mm focal length will be multiply by 1.5 times which is equal to 525mm. Thank you so much for your question. And thank you for choosing Sony. - Pakorn (Sony Social Support)

  Answered by SonyListens 3 years ago

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• Less than 275mm. You should just buy the FE300 lens instead.

  Answered by MIKE 3 years ago

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