HEXEUM AZ80600 Astronomical Telescope (Open Box)

Easy to set up. The telescope is easy to use and focus. The tripod is junk. Because it doesn.t have a adjustable height on the mount you are very limited on the angle of the scope, I tried to look at the moon when it was around 11 o'clock in the sky. I couldn't see the moon because the handle used to adjust the up and down motion would hit the mount of the tripod. I also sent a e-mail to the company asking what the silver screw on top of the scope was for. I send a picture of the screw and the told me it was the focus adjustment. It seems to me that their isn't any real customer service as stated in the item description. The scope worked fine once i mounted it on my camera tripod. I enclosed a transcript of the email. I wanted to know what this silver screw in knob on the back top of telescope is for.  Reply: Hello, please provide your order number and describe the issue you are encountering. Thank you! Why can't you just answer a simple question?  I sent a picture!! What is the knob for.??? Reply: Hello, this is the retractable tube used to secure and adjust the rear end of the telescope (this tube extends and retracts when adjusting the focus knob).