Threads like this are very informative. I mean, I just learned that Nightforce is on par with Tasco in the "light gathering" capabilities
A bunch of guys forget when "looking through someone’s scope at the range" that there are others out there that have bad eyesight or at least have different eyesight than you. All those scopes out there have focus ring on the eyebell. This is valuable little thing that will let you focus the reticle & clarity to YOUR eyes. This can be very different for different people.
There was a young man that came over to the house the other day to check his Remington 700. It was an ADL with an older 3-9 Tasco scope on it mounted in Lupy rings (typical deer killing machine). After he shot several times with not much consistency; I sat down behind the gun. I immediately ask him if he was blind (followed by a dumb look; which I then asked if he wore contacts). I turned the focus ring (a bunch) for me & shot a few times & got his gun right. He then sat down to "check" the gun for him & he exclaimed "I can see the bullet holes now!". Someone had obviously turned the ring to what looked right for THEM, & it was horrid for me & him.
Just because you get to "look" through a scope on the range. Unless you get permission to turn the side focus & focus ring to clarity for YOUR eyes... Don't just "think" the scope line is crap or not par to your personalized scope.
Now I will admit NF is not on par with S&B, Ziess (high end not Conquest) or Swarovski in the glass department. I have even seen a few Leupys that were as clear (MK4 & VX7) but your typical VX3 does not have better light transmission than any NXS, BR, or Varminter that I have ever compared at dusk (I have all these scopes -including the Lupy's- & are not just making BS assumptions like some).
To the OP; NF does do a decent job at dusk or twilight. There are others out there that do a bit better but you will pay the price for those too. All get to a point which makes seeing at longer ranges in very low light difficult. Conquests & VX3's gather all the light you need for typical LEGAL shooting hours, NF will surpass that. Probobly the biggest thing that needs to be noted is that if you have the NF illumination turned up too high. It REALLY distorts your night vision & can cause a decent "low light" image to go south. Likley the the cause of most negative comments about NF & low light.