www.astrocafe.hk

Just notice that there are new APM-LZOSs from APM website, the first page. They come with Strelh report & guarantee >0.95. For the APM-LZOS 100/800, the Strelh is >0.98. Are they designed by Riccardi? Can 社長 explain what are the differences between the new APM-LZOS & old APM-LZOS?

http://www.apm-telescopes.de/index.php
http://www.apm-telescopes.de/pro_auswah ... 1&katid=25

採用鋁管(非傳統的德國Kruppax鏡筒)、APM (非羽毛調焦)，整體成本降下來，鏡頭完全一樣。

當然從二手市場看，一定是德國Kruppax鏡筒加Feather Touch 3.5"調焦最保值，之前看到美國有一台152/1200APO，雖然那自製鏡筒非常漂亮，但最後叫價只淨下鏡頭價值。好幾年前有些人會用APM鏡頭在William Optics甚至Vixen鏡筒上，結果也一樣，二手價叫不起來。

ic ic... There is no free lunch.