a few words about my equipment i use.
Main telescope is GSO RC 8" Carbon tube and i change the focuser with new one moonlite 2". I use robotic step motor focuser from a new company http://pegasusastro.com/. My mount is the classic Skywatcher NEQ-6 Pro. I change the stock saddle plate with a new one from ADM for better stability. For ccd i use QHY 9 Mono with starlight express usb filter wheel 5x2". Inside the filter wheel i use the Baaders LRGB 2" filters. The 5th possition is empty for my Baader Ha 2" or Baader O-III 2". For quiding i use now starlight xpress oag. For quide camera i use the starlight express lodestar high sensitive ccd it's the best camera for guide. After all i have and the astrophysics ccdt67 Telecompressor for my telescope. I can photograph with the main focal lenght 1600m or the reduced 1150m.