SV550 122mm F7 VS SV550 80mm F6-Explore More Surprises
This large-aperture telescope is an upgrade based on the SV550 80mm. If you put the two together, you will be very surprised! READ MORE
SV550 122mm-Why is It Still the FPL-51 Triplet?
Why did we still choose the lens structure of the FPL-51 Triplet? We can discuss it together. READ MORE
Why Can't I Find a Shipping Method When I Select a Product with Free Shipping?
Why can't I choose the shipping method, When I try to buy SV550 with other accessories？ READ MORE