Thanks for your reply Mike.
Good point on collimation. I will focus on that. "lug" is an excellent word, its what I do when i Hike and what I was trying to describe I will be doing.
Ok. Youve talked me out of that selection and I'll get somthing more rugged. Whilst I understand your choice on 50mm, it's way to small. I'm typing this off the side of a hill that I lugged 20 odd kg's of gear pluss my 15x70 elcheapo binos.
Contrary to popular belief, I do exceptionaly well with such a pair for my needs.
I'm very grateful for your response all the same! You have helped clarify my thinking and made some excellent points. When i finaly lug myself and gear home
I'll refine my search whith collimation, ruggeredness & go down in size all round including mount. Should be a good result in the end I feel, that leads me to somthing BIG that suits me well for what I intend.
Thanks again Mike