Which was my very first star tracker. It’s a very good tracker. For the past year I are already using the Fornax Lighttrack ii. It’s a very distinctive system, but much more correct and stable than the skyGuider Professional. Locating it might be somewhat difficult. I used a 135mm samyang http://rylanuwvut.aioblogs.com/47611941/dang-ky-thabet-no-further-a-mystery