I'm looking at compact spotting scopes to lighten backpacking trips and would appreciate feedback on the following three models, in particular from people who have used one or more of them:
Brunton Eterna Compact 9050ED-S 18-38X50
Pentax PF65 ED XF Zoom 20x-60x
Nikon Fieldscope 13-30x50 ED
The Pentax isn't as compact as the other two but carries some pretty positive reviews.