italic font

Kerning Pairs gf and gy in Italic Fonts


Hello everybody,

why are letter pairs like ›gy‹ and more often ›gf‹ in so many otherwise nice italic fonts so badly kerned? For example:

http://Williams Caslon Text Italic OT

One of the rare exceptions:

http://Iowan Old Style BT Pro Italic

I’ve chosen the two examples, just because I like both typefaces very much.

Some explanations for that fact?

Thank you and kind regards