Question: what is the difference between sony e mount and fe mount?
Answer: Sony “DT” A-mount lenses can only be used with cropped sensor Sony cameras. E-mount - developed by Sony and introduced in 2010 with the NEX branding. ... The FE E-mount lenses are designed for full frame mirrorless Sony cameras and if used on cropped sensor cameras will have the field of view of longer focal length lenses.