wilbs 249 Posted January 22, 2019 Report Share Posted January 22, 2019 (edited) Just a quick question if you set your parallex at 40yds and zero it in and then you change your parallex to 50yds does that change your zero point? For many years thought it didn't but some people say it does so not sure. Thanks Wilbs Edited January 22, 2019 by wilbs Quote Link to post
philpot 4,990 Posted January 23, 2019 Report Share Posted January 23, 2019 In all honesty, I have no idea as I only use side focus scopes so not an issue but bringing my logic into play, which no doubt is wrong, I would have thought the scope would need zeroing again at the new setting. Interesting topic. Phil Quote Link to post
liP 700 Posted January 23, 2019 Report Share Posted January 23, 2019 Only way to be sure, is to set a couple of targets up at said distances and give it a try. Let us know how you get on Quote Link to post
flynndog 543 Posted January 23, 2019 Report Share Posted January 23, 2019 When I've used ao scopes i set it to infinity one looks like binocular or number 8 on its side done alright with it. Seems to be easier to use like that than to keep focusing imo Quote Link to post
LuckOrJudgement 437 Posted January 23, 2019 Report Share Posted January 23, 2019 I always thought it was only mag that effected zero? As in first and second focal plane? Quote Link to post
Deker 3,478 Posted January 23, 2019 Report Share Posted January 23, 2019 (edited) 29 minutes ago, LuckOrJudgement said: I always thought it was only mag that effected zero? As in first and second focal plane? It doesn't matter if its 1st or 2nd focal plane, Magnification should NEVER effect ZERO, only potentially the perception of flight path to ZERO! If it does I'd bin the scope! Edited January 23, 2019 by Deker 1 Quote Link to post
Deker 3,478 Posted January 23, 2019 Report Share Posted January 23, 2019 19 hours ago, wilbs said: Just a quick question if you set your parallex at 40yds and zero it in and then you change your parallex to 50yds does that change your zero point? For many years thought it didn't but some people say it does so not sure. Thanks Wilbs NO, just your eyes/focus.... ..….cheap scopes who knows??? Quote Link to post
wilbs 249 Posted January 23, 2019 Author Report Share Posted January 23, 2019 Cheers for the replies lads, am even more confused now! Got my Mrs to email the technical dept at Hawke today must admit they were brilliant they got straight back to me with an email trying to explain it and gave me a number to call if I was still unsure so going to give them a call tomorrow as it's easier to explain over the phone etc so will see how that goes. It's surprising on the number of variations of answers you get from different people you would think there would be a simple answer that everybody would know including myself Quote Link to post
Rez 4,961 Posted January 23, 2019 Report Share Posted January 23, 2019 Ahhhh. Parallax. Love it when this comes around. I personally don’t think it does but that simple finger experiment suggests otherwise. Finger up and out at arms length in front of you at a point of aim or on aim at something 10ft or 30ft away. Close your none dominant eye and move your head around looking at your finger on target. It moves all over the shop. Over the target, left and right. Parallax on this short focal plane does effect zero, if your finger is ‘zeroed’. Now if your finger is over a target 30 yards away, and you move your head side to side, it stays put. There is no parallax that can be noticed at that distance. Naturally that is only at 0x magnification. Basically, if you can absolutely garantuee your set up perfectly, parallax will not effect zero. 1 Quote Link to post
LuckOrJudgement 437 Posted January 24, 2019 Report Share Posted January 24, 2019 11 hours ago, Deker said: It doesn't matter if its 1st or 2nd focal plane, Magnification should NEVER effect ZERO, only potentially the perception of flight path to ZERO! If it does I'd bin the scope! I stand corrected. It's the degree of holdover that gets affected by changing the magnification at a given range. If you always shoot at the same setting this isn't a problem. Quote Link to post
Deker 3,478 Posted January 24, 2019 Report Share Posted January 24, 2019 3 hours ago, LuckOrJudgement said: I stand corrected. It's the degree of holdover that gets affected by changing the magnification at a given range. If you always shoot at the same setting this isn't a problem. I think I see where you are coming from, but if we are talking ZERO, then it will not change with 1st or 2nd Focal plane and it will not change with magnification. If your zero is (for example 100yards) then that is what you will hit regardless (all else being equal), first/second/magnification will not effect ZERO. There is NO holdover to consider if you are shooting at whatever ZERO you have set, with 1st/2nd or magnification change, just differences up to and past ZERO! I think that's where you are going with above post. 1 Quote Link to post
philpot 4,990 Posted January 24, 2019 Report Share Posted January 24, 2019 3 hours ago, Deker said: I think I see where you are coming from, but if we are talking ZERO, then it will not change with 1st or 2nd Focal plane and it will not change with magnification. If your zero is (for example 100yards) then that is what you will hit regardless (all else being equal), first/second/magnification will not effect ZERO. There is NO holdover to consider if you are shooting at whatever ZERO you have set, with 1st/2nd or magnification change, just differences up to and past ZERO! I think that's where you are going with above post. Nicely put that man. Phil Quote Link to post
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