Thought it might be worth resurrecting this thread for the purpose of raised awareness though it's lengthy and I admit I haven't read the earlier comments. I found this very useful article:
http://www.ethicalconsumer.org/portals/0/downloads/optics report.pdf
Basically Leica, Swarovski, Bushnell, Vortex among those strongly pro-hunting. And let's look at the main photography brands: Canon scores well. Nikon a disgrace. Thankfully I'm a Canon owner but also a Leica 'scope owner so very disappointed there.
I disagree with the above statement that being so pro-hunting is unethical. Trophy hunting should have been banned centuries ago and the scumbags involved locked up. These companies care nothing for the wildlife, only their own profits. Some may try to appear to be sponsoring conservation projects to counter this but likely to be a gimmick for damage limitation in my view.
Anyway few birders realise what these manufacturers are tied up with so hopefully some might reconsider their next purchase. I personally don't want to sponsor the sponsors of the extinction of threatened species.