Two Cases of Skewed Zenith

（中文在後）
Is it always a good practice to align a cartridge with its cantilever parallel to the reference lines on the protractor? In the two cases shown here, probably not. In fact in both these cartrdiges, the builders seem to be aware of the skewed zenith angle and install the cantilever slightly at an angle to compensate for the skew.

用唱頭的針桿來對準尺規，而不用唱頭外殼為準，是許多「專家」會堅持的。但看這兩個相當高價的唱頭針尖，底部的zenith角有明顯偏差。如果用針桿來調整，顯然不會得到最佳設定。而在這兩個唱頭，製作者似乎知道有這個誤差的情況，而將針桿安裝偏一點角度來補償，而非平行於唱頭外殼。所以如果看到一個新唱頭的針桿不太正，或許是有其背後道理的。