Glen's correct, if you're imaging, which is what I assumed you'd be doing, in reality you don't need it.
But, for me, it's very convenient to just use a Telrad, hence why I said to get me 'in the area' of where I'm imaging.
Also with the Telrad's FOV I get a better idea when using Starrynight and the Telrad FOV overlay of my imaging field and target.
It's simple enough to use, look through it, confirm you're close to your object and you're done with it, you won't need to use it again till you move onto the next object.
But if you want it for visual, then what Rob said is spot on.
