Schmidt-Pechan prism
...that the Schmidt-Pechan prism is a type of roof prism used for image erection in binoculars?
...that the <b id="mwAdw"><a class="mw-redirect" href="./Schmidt-Pechan_prism" id="mwAd0" rel="mw:WikiLink" title="Schmidt-Pechan prism">Schmidt-Pechan prism</a></b> is a type of <a href="./Roof_prism" id="mwAd4" rel="mw:WikiLink" title="Roof prism">roof prism</a> used for image erection in <a href="./Binoculars" id="mwAd8" rel="mw:WikiLink" title="Binoculars">binoculars</a>?