The strobist blog is very informative and highly recommended reading for many reasons, but please note that it won't translate directly into what you will likely do with your RZ67 and ISO100 film. If you want decent depth of field, you need F/11 or F/16 on your RZ67, and small strobes will give you F/4 and F/5.6 whenever you fire them indirectly or through an umbrella. I stubbornly resisted studio flashes for a few years but finally gave up last winter and got a D-Lite 4, and the difference in the pics is like night and day.