With a digital zoom of only 4 times zoom factor, the Nikon S3500 has a fairly small digital zoom compared to most of the other similar spec cameras that have been on the market for around the same time as this camera. The digital zooms of comparable spec digital cameras that are a similar age to this digital camera range from 2x to 810x.
It may also be worth considering one of the alternative 4x digital zoom cameras currently available including because of it's better review score, the Canon EOS 5D Mark II, the Nikon S9400, or the Panasonic DMC-TZ60 (£219).
If this camera digital zoom is too small for you then you might also want to consider the Alpha A5100L (8x), the Alpha A5100 (£389.99) (8x), or the DSC-WX220 (£99.99) (20x) all from Sony which also has a higher rating.
What does "digital zoom" mean?