Hi Rod.
I had one until recently.
Yes it is a great finder, quite evenly sharp across the field.
Fairly heavy though for a dob, might need a bit of counter balancing.
I wanted to put it on my 14.5 but Peter said it was too heavy, also there was not much to attach it to..
I thought of keeping it as a grab and go refractor but there are a couple of downsides.
The amici prism naturally introduces some diffraction spikes on very bright objects like Jupiter
and maybe for the same reason the brighter stars were a bit fuzzy.
It was nice to use hand held.
You can just get the Ethos 13 to focus in it.
gb.
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