Thank you Anthony for lending me your sky tracker  =)
Location: Tai Au Mun
Comet Lovejoy
15-1-2015
Nikon D600 (Unmodified)
70-300mm ED, 170mm@iso800
1min x 78 with dark and bias frames
DSS, PS

玫瑰星雲（NGC 2237)
15-1-2015
Nikon D600 (Unmodified)
70-300mm ED, 300mm@iso1600
1min x 25 with dark frames
DSS, PS

In fact I did not expect my unmodified Nikon cam could capture the “Rose” so that I only took 25 frames for testing only.