I needed a lightweight guide scope for my SA GTi and the SV165 is ideal. It is very well made, good quality.
ข้อดี: The M42 thread at the rear means you can, with a M42-CS adapter, screw fit e.g. an ASI120 guide camera into the scope instead of using the compression ring. I prefer this.
The focus lock ring is big, ideal for using in the dark.
I am a beginner and bought this to make sure my scope was set up correctly.
The slight problem I had was that the batteries supplied where dead but when I was able to buy new ones it worked very well.