Hi russ, watched your vid on the ds35 vs and the alpex 50, which helped remove the alpex. I think i will go with the the dnt 5-20 for now and look at some more vids of different nv units. Thanks to all for your advice@verpa The Zulus' image is outstanding, they're very light / compact and the 312R's BCL works down to very short ranges. The 850nm IR illuminator head is also swappable to 940nm.
This is great because within 10m on my bullpups (with high scopes), each metre makes a significant difference to the calculated holdover; the closer the target the greater the difference.
I do own both a gen.1 Pard DS35-50RF and a gen.2 DS357RF and I do like them (hence still owning both), but I also own both a ZHD520R a ZHD312R. If I could only choose one design it would be the Zulus.
If you don't shoot beyond 30m I'd go for the ZHD312R, if you shoot beyond 30-40m = ZHD520R.
Hope this helps, cheers. Russ
P.S. russ keep the vids coming