Please accept my apologies. I responded to the wrong thread.
It would be fun to have a beer, look through glass, and compare twilight factors sometime!
Again sorry.
The 10 NLs have about the same FOV as you 8.5’s.
And they’ve improved the light performance so the difference is probably less then most think. I don’t know that I can tell the difference between me 12x50 ELs and my 10x42 NLs. At least it’s not enough matter to me.
For another perspective my son ran 10x 42 ELs and 15x56 SLCs. I made him use my 12 NLs for one day (he gave them back 3 days later) on a Coues hunt. When he gave them back he said “ I want to sell my 10’s and 15’s and buy 12 NLs…
I guess I wasn’t clear.
I now own 3 sets of NLs and 0 ELs.
I still own 15x56 SLCs I never use. I run 12 NLs and a ATX on a dual mount. (The picture had 12Ezls)
Once I used 12 NLs it was an easy choice For me. I couldn’t see enough of light
Gathering difference to matter and the form factor, fov, edge sharpness, and weight savings were huge.