14 images of 2 min each at ISO 1600 (due to elongation of stars) in June 07.
Better guiding at 10 min at ISO 400 in July 07 but only 2 images were collected.
That is why only 48 min exposure at F7.5.
Unfortunately, no way to show the 3rd outer dust lane in HK. I believe we need at least 2-3 hrs exposure in HK.
Must go to Taiwan/Australia someday.
發表於 2008-7-20 23:46
| 
