Finally I tested it last night. I used it to watch Mars. Both 50X and 140X.
The image is not very sharp although I can see the southern icey cap. It needs
collimation. I also use it to watch Albireo. That is very easy and very
beautiful. M13 is great too :) Very big in 140X :)But for double's double(Lyra
Epsilon), the seeing is not very good and it can't be splited :(
I will try to collimate it today.
