\documentclass{minimal}
\listfiles
%\usepackage[T1]{fontenc}
%\usepackage[latin1]{inputenc}
\usepackage{pstricks,pst-lens,graphicx}
\pagestyle{empty}
\parindent=0pt

\begin{document}

\newcommand{\tigerHead}{\rput[lb](0,0){\includegraphics[width=4cm]{tiger}}}
\newpsstyle{SimpleGlass}{linestyle=none}\psset{LensStyleGlass=SimpleGlass}
\begin{pspicture}(0,0)(4,4.5) \tigerHead \end{pspicture}\hspace{0.5cm}
\begin{pspicture}(-0.5,0)(3,4.5)
  \PstLens[LensHandle=false,LensSize=1.8,LensMagnification=2](1.2,2.3){\tigerHead}
\end{pspicture}\hspace{0.5cm}
\newpsstyle{SimpleHandle}{fillstyle=solid,fillcolor=white,framearc=0.5}
\psset{LensStyleHandle=SimpleHandle}
\begin{pspicture}(0,0)(4,4.5)
  \tigerHead
  \PstLens[LensSize=1.5,LensMagnification=4,LensRotation=-45](1.5,2.5){\tigerHead}
\end{pspicture}

\end{document}
