What kind of lens was most likely used for this photo?

fixed focal length
7818
zoom
2357
telephoto
1616
macro
3296
Such shallow depth-of-field is possible with lens of large aperture size (small f-number). The large aperture is a typical feature (and advantage) of a fixed focal length lens. The photo was taken with a 50mm f/1.4 lens.
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Debbie Fox
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