# change margin on beamer title slide

I want a wide right margin for most of a presentation using beamer. I can change the margin for all beamer slides like so:

\documentclass{beamer}
\usepackage{lipsum}
\title{A title}
\author{The author}
\setbeamersize{text margin right=5cm}
\begin{document}
\maketitle
\begin{frame}
\lipsum[1][2]
\end{frame}
\end{document}


Is it possible to change the margin for the title slide? I would like the title, author and date to be horizontally centered (so in effect, no wide right margin for the title slide but a wide right margin for all other slides).

Based on Gonzalo Medina's answer, I have come up with this which seems to work:

\documentclass{beamer}
\usepackage{changepage}
\usepackage{lipsum}
\setbeamersize{text margin right=5cm}
\setbeamertemplate{title page}
{
\vskip0pt plus 1filll
\begin{centering}
{\usebeamerfont{title}\usebeamercolor[fg]{title}\inserttitle}\\
{\insertauthor}\\
{\insertdate}\\
\end{centering}
\vskip0pt plus 1filll