thanks for youre support guys
i think i found the right spot for the bendy thingies!
next task - collimating
seems like a step up.. but i found a good DYI article so i will try one day soon
quick question - the front(?) has a big cap.. and in the centre of it is a small cap. do i only remove the small cap when i want to look or do i take thebig one off too?
also could someone please breifly explain the differenc between different size lenses?