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Question about a scope's erector tube and spring
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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/28/2018 at 09:51
tpcollins View Drop Down
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A typical scope should have a turret at 12 o'clock and 3 o'clock. A spring is located at about 7:30.  If the windage turret for example is nearly maxed out going in one direction, can it influence the elevation turret as well. 

Or is the bottom of the turret large enough to keep it on plane and from sliding off the round erector? I had Vortex tell me once that if the elevation was maxed for example, then erector tube could bump the inside of the scope tube and affect the windage as well - make sense I guess.

Just wondering which would be most likely to change POI - the round erector sliding off the bottom of the turret or the erector tube bumping the inside of the scope tube?  It might make a difference whether it's a $100 scope or a $1000 one .  Thanks.






Edited by tpcollins - March/28/2018 at 10:01
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/28/2018 at 10:28
koshkin View Drop Down
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The question is too generic since there are multiple ways of building this system.  Different scopes have difference spring arrangements.  The means of how turret stems contact the tube vary.  The overall amount of adjustment that the turrets can have is often guardbanded with stops put in that prevent excessive pressure on the erector tube, etc.

With PRB, you have to be really careful with how you interpret the optics info there.  It is often misleading due to being either over simplified or just wrong. 

If you plan to spin the turrets a lot, none of the $100 scopes will do the trick.  The erector tube is not supposed to bump the inside of the maintube since there should be a limiter in action prior to that.  On cheap scopes it might do something like that, but not on any decent ones.

Being at the very end of vertical adjustment can effect horizontal adjustment and vice versa, but you have to keep in mind that there are other effects at the end of the adjustment.  For example, for many scopes, if you adjust that far, you need to re-adjust the parallax.

ILya
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