Many thanks gentlemen for your swift replies and advice. Like I said, I only started noticing butterflies last year, so I am what can only be regarded as a rank beginner

. Hence I didn`t know about how close certain species will let you get near them before flushing..Thanks Dave M
Trev, I had trawled through the relevent threads regarding close-focussing bins; my Nikon HGLs will only focus down to 3m - so that perhaps is where I need to think about getting a second pair for "butterflying", though I cannot really walk around with two sets of bins round me neck !
Pete, I really didn`t know if anyone did use hand-magnifyers in the field, hence my original question. Perhaps it was rather naive of me
Padfield, you describe pure heaven to me ! I hope you mean Real ale though
Once again, thanks for helping guys. I am really looking forward to this coming summer..
