Originally posted by Schraubstock Oh dear, oh dear, you still don't get it, I think you are trying to write a doctor thesis here. And while we are at it lets ban the word "suction" because suction does not exist. And we also have gone down to "molecules" I guess atoms are next. You are "over explaing" things.
Anyway we are digressing and talking around circles, lets stick to the topic.
Greetings
Sorry, I'm like that. I tend to go way too in depth in explanations, and end up confusing people. I probably wouldn't make a very good teacher.
Anyway, I'll just sum it up simply: any sized hole = constant pressure = constant force experienced by piece of dust (smaller than hole). Larger hole = greater flow volume.
Your idea to make a larger hole to control where the air enters is correct (more air, and thus dust, will flow into the big hole than the smaller ones), but the idea that the weather/dust sealing of the K-5 makes dust worse is not correct.