I owned a pair of the 20's. They were good for long distance on a tripod. Each side tube is very large and the support/alignment system in the middle was not strong enough in my opinion. They came out of alignment once on me, resulting in seeing double. I played and played with them until they were back in alignment but they didn't stay that way long. After calling Pentax about them, they would look at them and send me an estimate for repairs. I figured the cost would be almost as much as the binos original purchase price with no guarntee they would stay fixed. I chucked them and for that reason won't do business with pentax anymore. Leupold gave me new binos when some Wind River lens got scratched, can't beat that!!!
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Measure wealth by the things you have,, for which you would not take money.