I have a Paddy Pallin rucksack which I’ve been using daily for 9 or so years. They don’t ake them like this one any more - more’s the pity. I could do with a new zipper. It’ll zip one way but not the other. I’ve become well known for carrying this purple bag everywhere! Hence my calling it “the” rucksack.
Anyway, I ended up using the rucksack to test macro flash outcomes from my Coolpix 3700, handheld. The result is quite OK.