Math "f" in mtpro2

Question

I'm aware that this might not be a very transcendental question, but I've noticed something very particular with the math fonts in mtpro2. It turns out that the letter "f" is slightly different displayed when using math mode in comparison with the emphasis or italic modes. In the first one, the "f" is larger and wider. Of course, the difference is very subtle, but honestly I prefer the italic version. Is there a way to set the math letters to have the italic shape? Thanks in advance.

Pd: The same occurs with "u" and "v". This case is more clear.

Answer 1

The MTPro2 fonts don't provide a text font and you have to supply a clone of Times yourself.

With newtxtext we can compare the height of a math and a text italic x to get

respectively. OK, let's apply a magnification by a factor 1.0316

\documentclass{article}
\usepackage[scale=1.0316]{newtxtext}
\usepackage[lite]{mtpro2}

\begin{document}

$f$\textit{f}

\sbox0{$x$}\the\ht0

\sbox0{\itshape x}\the\ht0

\end{document}

Now text italic and math italic have the same height and, indeed, the two f letters are comparable in vertical size. Not in precise shape, but that's common for math fonts, as barbara beeton remarks.

It's not so difficult to change the round math italic v into the text italic v or to borrow it from newtxmath. I wouldn't recommend it.

Answer 2

Just to show the difference between text italic and math in Computer Modern. Most (all?) letters have slightly different shape.

\documentclass{article}

\usepackage{xcolor}

\begin{document}

\ooalign{\hfil$b$\hfil\cr\hfil\textcolor{red}{\textit{b}}\hfil\cr}%
\ooalign{\hfil$c$\hfil\cr\hfil\textcolor{red}{\textit{c}}\hfil\cr}%
\ooalign{\hfil$g$\hfil\cr\hfil\textcolor{red}{\textit{g}}\hfil\cr}%
\ooalign{\hfil$m$\hfil\cr\hfil\textcolor{red}{\textit{m}}\hfil\cr}

\end{document}