I own a pair of old Zenith Tempest 10x50 binoculars (Japanese, probably 1970s vintage with porro prisms). They were my grandfather's.
On the weekend I dropped them and now they are knocked out of collimation (doubled stars).
They do not appear to have any collimation screws. In fact, after finding articles on servicing old binoculars I now know how to completely take them apart and clean them, but I haven't found any good information on how to collimate this type of binoculars.
Once I have figured out how to collimate them, I'm likely to use the sun projection method to guide the actual collimation process.
https://sites.google.com/site/rchamo...-of-binoculars
Does anyone have any advice?
I can pull them apart and take photos if anyone needs to see the prism setup or something in order to advise me.