Ampix0
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Wow, if that's a green screen I'd sh*t my pants. That thought never occurred to me, but I don't think that's the case. I'm sure it's just a high quality L series lens producing a fantastic picture.
As far as 80-100mm? I highly doubt that. It's probably a 30mm shot max, but I wouldn't be surprised if it was 24mm or lower. It looks like she's sitting quite close to the camera.
See how the bed appears large in comparison to her? And the lack of distortion in her face, which you would expect to see if she was close to a wide angle lens. Something about it looks a little funny to me, I think she must have a decent distance between her and the camera. Maybe 10-15 feet even.