这位英格兰的同好一直用TTS摄影，已经上过两次APOD，以下引用自他的原文说明：
All the images here were taken at the same Focal Length with the same equipment from the garden of my home with the following equipment :-
Borg 125SD (F3.9) Astrogragh, a TTS 160 Panther Alt Az mount, a CentralDS cooled Canon 60D and a CentralDS cooled Canon 600D Pro II Mono.
The TTS 160 Panther Alt Az mount with it's rOTAtor allows accurate long exposure astrophotography, normally only achieved by Equatorial mounts. The rOTAtor, as it's name implies, rotates the whole OTA/Guide scope combination, allowing auto-guiding using a simple guidescope/guide camera arrangement.
The TTS mount is sturdy, very well made and is super easy to set up.
No levelling or polar alignment is needed. In fact, only a simple 2 star alignment is required. Additionally, being an Alt Az mount there is no "Meridian Flip" and targets can be imaged from East to West without interruption to the tracking.有兴趣可以去看看他的作品：
https://alphaquadrantobservatory.smugmug.com/
觀星相簿 
