This is my current main set-up for imaging DSOs. It consists of a Meade LXD55 SN6 6-inch f/5 Schmidt-Newtonian OTA on a Vixen GP-DX equatorial mount with SkySensor 2000PC Goto supported by a Universal Astronomics surveyor's tripod (much steadier than the GP-DX's stock aluminum tripod). The guidescope is a ubiquitous Chinese short tube 80mm f/5 achromat. In this photo a stand-alone autoguider is being used with the guidescope. A diagonal was required because otherwise I could not focus the guider's sensor. (I could not source a short 1.25-inch extension tube.) PS. Yes, I should have removed the scope's front dust cover before taking the photo!
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