This could be a font, but keep in mind that many tattoos are not based on typefaces. I'd say the best ones are hand-lettered by a skilled tattoo artist. If you want this ‘f’, the best way to go is hire a lettering artist because they can make exactly what you want.
thanks Stephen, i knew it was a font and i know that many tattoos are hand-lettered
now i found out: this here was inspired by Mark Simonson's Kinescope