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I've narrowed choices for my next scope down to the Leupold 3-9x40mmPR with standard duplex and the VXII 6-18x40 Adjustible Objective Target w/ the fine duplex reticle. I'm leaning very heavily toward the latter.

Can someone please explain how a parallax adjustment works? Is is even neccessary, as I notice many scopes don't have it. Is it possible to lock the objective once it is set? Do flip-up lense covers interfere with the adjustable objective?

Also, does anyone have any experience with the second scope mentioned or thoughts about the fine duplex reticle over the standard duplex? Or any other misc. thoughts/comments/concerns?

Finally, do either of the Leupold scopes mentioned come with a sunshade? Or is that a seperate item? And I do hope they come with some kind of lense cover to protect them until I get the butler creek flip-open covers on.

Thanks in advance.
 

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I'll answer what I can.

Neither comes with a sun shade.

The adjustable objective is a good feature to have, and if it comes down to it being a deciding factor, always go with the AO.

Yes, if the AO is on the objective end (no side focus, etc) then it can pose a minor problem with your flip ups in that they will not be lined up nice and pretty all the time. The objective doesn't rotate a whole bunch, so its generally just an inconvienence.

The fine duplex is nice for target shooting, as it allows you to be more precise. But you can lose the crosshairs on dark targets out in the field. The heavier duplex helps in those regards, but isn't as precise.

MEL
 

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I've narrowed choices for my next scope down to the Leupold 3-9x40mmPR with standard duplex and the VXII 6-18x40 Adjustible Objective Target w/ the fine duplex reticle. I'm leaning very heavily toward the latter.

Can someone please explain how a parallax adjustment works? Is is even neccessary, as I notice many scopes don't have it. Is it possible to lock the objective once it is set? Do flip-up lense covers interfere with the adjustable objective?

Also, does anyone have any experience with the second scope mentioned or thoughts about the fine duplex reticle over the standard duplex? Or any other misc. thoughts/comments/concerns?

Finally, do either of the Leupold scopes mentioned come with a sunshade? Or is that a seperate item? And I do hope they come with some kind of lense cover to protect them until I get the butler creek flip-open covers on.

Thanks in advance.
Para
I've narrowed choices for my next scope down to the Leupold 3-9x40mmPR with standard duplex and the VXII 6-18x40 Adjustible Objective Target w/ the fine duplex reticle. I'm leaning very heavily toward the latter.

Can someone please explain how a parallax adjustment works? Is is even neccessary, as I notice many scopes don't have it. Is it possible to lock the objective once it is set? Do flip-up lense covers interfere with the adjustable objective?

Also, does anyone have any experience with the second scope mentioned or thoughts about the fine duplex reticle over the standard duplex? Or any other misc. thoughts/comments/concerns?

Finally, do either of the Leupold scopes mentioned come with a sunshade? Or is that a seperate item? And I do hope they come with some kind of lense cover to protect them until I get the butler creek flip-open covers on.

Thanks in advance.
Parallax is essentially your focus or fine tuning. Your optical is adjusted to give you a fine recticle when viewed against a flat white surface. Your parallax does your various distances.
 

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Can someone please explain how a parallax adjustment works?
Adjusting parallax is to bring the image you see into the same plane as your reticle so that when you move your head/eyes around you don't get movement of the image on your reticle. Typically, one will test this alignment when looking at a target by moving one's head around a little bit to see if the image is moving around at all on the reticle. In fact, one shouldn't use any numbers on the parallax nob and assume that hose numbers give you any kind of true parallax alignment. Some parallax nobs don't even have numbers on them as it's up to the shooter to do the proper adjustment by the method I've described.

Is is even neccessary, as I notice many scopes don't have it.
Typically fixed powered scopes has a set parallax for a particular distance. You don't need parallax adjustment if you're shooting at the same distance as a scopes fixed parallax. And, if you can aim with your face, head and eyes in exactly the same place every time you squeeze off a round, that'll help a lot in not needing to use parallax adjustment.

Is it possible to lock the objective once it is set? Do flip-up lense covers interfere with the adjustable objective?
Lens covers may not be in the position you want when adjusting the parallax.
 
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