I am working with the SFP 3-21x Exos and brought it to Alaska with me,
The air there is very humid, wet is a word, and once the temps creep above 70 it's a wall of water to see through. The S&B Cut the mirage better than 99% of the scopes on the line. The students all took a turn checking it out, this is where differences in glass and coatings come into play.
Everyone is used to comparing it to good conditions or during competitions where things are laid out nice and neat for you. Once the air quality turns sour, and you start magnifying the problems glass quality starts to take front and center. Because the range is not graded and actually has a lot of holes in it, we have targets that are off the ground very high but sit just level with the shooter's positions. The mirage just covers things up really bad.
So bad in AK last month we could not see the MagnetoSpeed T1000s flashing except when the very slight breeze moved it. I had one higher-end, popular scope not see targets on the berm at 600 yards, they just disappeared. The S&B Cut the mirage enough to see everything including 5" Clay pigeons.
Here in CO where the air is dry, most scopes look great, very little downside and very little mirage even in the high heat. Add in variables, better glass shines. The Coatings on the S&B also help pull colors out of vegetation so you can identify objects in the woods. If you want to look at glass quality put out reds and yellows and see how they look, use the main primary colors too, Blue, Red, Yellow, vs just White or black targets and that is glass starts to shine.
The new turret design is also pretty friggin sweet,
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This is a BAD ASS SCOPE even if its SFP