New Posts New Posts RSS Feed - What actually moves - the reticle or image?
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Check GunBroker.com for SWFA's No Reserve and No Minimum bid firearm auctions.

What actually moves - the reticle or image?

 Post Reply Post Reply   Topic Search Topic Search  Topic Options Topic Options
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/15/2018 at 07:40
tpcollins View Drop Down
Optics Journeyman
Optics Journeyman


Joined: January/12/2009
Status: Offline
Points: 401
I understand what the erector tube does inside a scope with respect to changing the poi. But I cannot not find online what specifically accomplishes this. 

I know it looks like the reticle is moving but I have to believe the reticle is fixed and it's the image off the front erector lens that is actually moving ( or tipping ?? ) when adjusting. Yeah or nah? 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/15/2018 at 09:07
supertool73 View Drop Down
Optics God
Optics God
Avatar
Superstool

Joined: January/03/2008
Location: Utah
Status: Offline
Points: 10841
Depends if the reticle is first focal point or second focal point
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/15/2018 at 11:40
tpcollins View Drop Down
Optics Journeyman
Optics Journeyman


Joined: January/12/2009
Status: Offline
Points: 401
Depends if the reticle is first focal point or second focal point

So the reticle moves in one and doesn't in the other? I thought FFP and SFP was simply based on whether the reticle is set in front or behind the magnification array.  Don't see what that has to do with what moves when the elevation/windage turrets are adjusted? 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/15/2018 at 12:13
supertool73 View Drop Down
Optics God
Optics God
Avatar
Superstool

Joined: January/03/2008
Location: Utah
Status: Offline
Points: 10841
Sorry i didnt disern your question properly. I have been dopped up on percocets for a week.

Ffp the reticle is on the front side of the erector so when you adjust the mag on the target the reticle adjusts size accordingly. Sfp is near the eye peice so it does not change with magnification, which it sounds like you already have down.

The erector is a tube inside the scope tube. It physically moves up, down, left , right, in the tube. The reticle being attached to the erector moves with it. It is designed this way so it appears the reticle is always centered in the tube evn though it is not. I have an IOR scope that actually does not stay centered and its a little odd as when zeroed it sits hight and to the right in the image.
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Similar Threads: "What actually moves - the reticle or image?"
Subject Author Forum Replies Last Post
There are no similar posts.


This page was generated in 0.180 seconds.