GSO

GSO or Guan Sheng Optical, supplier of all kinds of telescope accessories. GSO supplies everything in the field of accessories.

Price/quality is of paramount importance. Eyepieces, diagonals, main and secondary mirrors or mirror holders. Everything from focusing devices to telescope brackets is available at GSO.

Ganymedes generally has a lot of GSO in stock, which means that it can be delivered quickly at very reasonable prices.