Comments of various equatorial mounting  赤道仪 - http://www.astronomy.com.cn/bbs/thread-110425-1-1.html

http://blog.deepskycolors.com/gear.html

Biggest DC - http://digiphoto.techbang.com.tw/posts/1108-26-billion-80-million-pixel-digital-camera-the-vast-sky http://www.eso.org/public/teles-instr/surveytelescopes/vst.html