Tube amplifiers, audio analyzers, and old cameras ...

Recently I got Soligor (Miranda) TM with nice external shape. However, there are several serious defects. Most serious one is defect of silver plating of pentaprism as seen in the first photo. Fortunately, it could be repaired by replacing the pentaprism.  I noticed that this can be replaced by pentaprism of Pentax SP or SPF. The length of longer side of the prism is slightly different, but can be adjusted by inserting spacer of black papers as in the second photo.  It is now perfect as can be seen in the third photo.
最近Soligor (Miranda) TMを入手しました。このカメラ外観はなかなか綺麗ですが、いくつか問題がありました。もっとも深刻なのは、ペンタプリズムの不良です（１枚目写真）。幸い、このプリズムはPentax SPまたはSPFのプリズムとサイズが似ています。２枚目写真のように黒厚紙を差し込んで調整可能です。フォーカスもばっちりで３枚目写真のように完璧に修理できました。