usually scopes have 2 knobs, windage and elevation but most

Bullet power.

>>34045697
To get more thrust per squeeze.

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72KB, 543x800px

>>34045697
Parallax

>>34045697
That knob on the left is for assisting parallax, or in layman's terms adjusting it for the distance you are shooting at. You can research what it is.
Sometimes some scopes have that knob be a illuminated reticle knob.

>>34045742
it's illumination you dingus

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35KB, 728x410px

>>34045763
>>34045742
I thought pic related was the parallax knob?

>>34045792
no, that's for sight correction

>>34045792
thats just for fine focusing

Look at u faggots... you guys dont even fucking know...
Bunch of shit eating rednecks in dis board right hurr...

It can be a couple of things. Brightness levels for illuminated reticles, or in your case, parallax adjustment for varying ranges. Those are the two main culprits.

>>34046313
>>34045742
>>34045763
Can you elaborate on what the parallax knob does?

third knob makes it full auto

The amount the bullet will curve in order to make cool videos

>>34046335
changes focus

>>34046335
Parallax is, in as simple a term as a posible, a shift in the point of aim depending on the viewing angle. Parallax can be corrected based on range in some high end scopes, while others just kind of say fuck it.

>>34046335
>>34046453
Doesn't it actually change how much the reticle moves when you rotate the scope with eyes/head fixed?