2008年2月25日 · I'm new to the Patterson tank too and was floundering around trying to find a good, repeatable method of agitation with the tank and finally got the best results by doing …

2010年12月13日 · Of course, in 1979 Leica was in the middle of the M5 marketing debacle, with the Leica CL eating away at M-series profits. So economies like those plastic parts were …