Hi Peter Leung,
About the brand name of telescope, pls be aware that some warranty service of "L" brand is in question.
The 30-yr warranty is in fact not very reliable. I had a bad experience with the agent of L brand here of which they considered some optical failure as a result of "not appropriate use" (not clearly defined in the warranty card).
In my case, they said there was a dent on the body and this dent caused the optical problem (cannot focus sharply). So they said the repairing service must be charged! The interesting pt is that this problem had happened before, the dent had been there as well and they did not charge me in the first time.
So, do question more about the warranty. For me the service of L brand is totally frustrated.
Captain