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Parallax question (updated with pictures) #6452840 09/15/16 03:49 AM
Joined: May 2011 Posts: 358 M Matt Hejl OP Bird Dog
OP Matt Hejl Bird Dog M Joined: May 2011 Posts: 358	I have an older scope that's 4-16 and it has a parallax adjustment on the front lens. It has the numbers 2,3,4,5,8,infinity, 100, 150, and 50. They aren't in that order though...you have to go different directions to reach some of these numbers. I kinda understand parallax, but what are the 2-8? And why different directions on the lens? Thanks See from first picture to last is me twisting the lens counterclockwise. I cant make sense of the numbers and the order they are in Last edited by Matt Hejl; 09/15/16 01:51 PM.

Re: Parallax question [Re: Matt Hejl] #6452889 09/15/16 06:07 AM
Joined: Jan 2011 Posts: 2,394 Justin, TX B booradley Veteran Tracker
booradley Veteran Tracker B Joined: Jan 2011 Posts: 2,394 Justin, TX	I have no idea if the numbers are not in numerical order. Don’t roll those bloodshot eyes at me.

Re: Parallax question [Re: Matt Hejl] #6453230 09/15/16 02:25 PM
Joined: Nov 2012 Posts: 15,637 Lubbock, TX Q QuitShootinYoungBucks THF Celebrity
QuitShootinYoungBucks THF Celebrity Q Joined: Nov 2012 Posts: 15,637 Lubbock, TX	They seem to be in order to me???? 50 100 150 2(00) 3(00) 4(00) 5(00) 6(00) Infinity https://web.archive.org/web/20170223065011/http:/www.rrdvegas.com/silencer-cleaning.html

Re: Parallax question [Re: QuitShootinYoungBucks] #6453272 09/15/16 02:46 PM
Joined: May 2011 Posts: 358 M Matt Hejl OP Bird Dog
OP Matt Hejl Bird Dog M Joined: May 2011 Posts: 358	Originally Posted By: QuitShootinYoungBucks They seem to be in order to me???? 50 100 150 2(00) 3(00) 4(00) 5(00) 6(00) Infinity The 100 is to the left of the 150 mark, and the 50 is to the right of infinity.

Re: Parallax question [Re: Matt Hejl] #6453342 09/15/16 03:31 PM
Joined: Jun 2015 Posts: 5,918 West Texas J Jgraider THF Trophy Hunter
Jgraider THF Trophy Hunter J Joined: Jun 2015 Posts: 5,918 West Texas	Originally Posted By: Matt Hejl Originally Posted By: QuitShootinYoungBucks They seem to be in order to me???? 50 100 150 2(00) 3(00) 4(00) 5(00) 6(00) Infinity The 100 is to the left of the 150 mark, and the 50 is to the right of infinity. If I were guessing I'd bet you cannot just spin this AO around without it stopping somewhere (infinity), correct? If so, set it on the 50 and look at something 50 yds to see if it's in focus, then repeat at each distance. Once you get to infinity, I bet you can't just spin it over to 50, you'd have to reverse the twist all the way back around to 50 and start over. Clear as mud now?

Re: Parallax question [Re: Matt Hejl] #6453457 09/15/16 05:15 PM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	Maybe the pitch of the mechanism's threads are different on each side of infinity to aid finer adjustment. I've never seen one like that. What's the make? "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: RiverRider] #6453532 09/15/16 06:09 PM
Joined: May 2011 Posts: 358 M Matt Hejl OP Bird Dog
OP Matt Hejl Bird Dog M Joined: May 2011 Posts: 358	Originally Posted By: RiverRider Maybe the pitch of the mechanism's threads are different on each side of infinity to aid finer adjustment. I've never seen one like that. What's the make? Redfield...its an older 6x-18x

Re: Parallax question [Re: Matt Hejl] #6453535 09/15/16 06:10 PM
Joined: May 2011 Posts: 358 M Matt Hejl OP Bird Dog
OP Matt Hejl Bird Dog M Joined: May 2011 Posts: 358	I have never used the scope, but if I mount it and look down it at a range...will I be able to tell if its set correctly by simply just focusing on things at different distances and seeing if its sharp?

Re: Parallax question [Re: Matt Hejl] #6453549 09/15/16 06:17 PM
Joined: Jun 2015 Posts: 5,918 West Texas J Jgraider THF Trophy Hunter
Jgraider THF Trophy Hunter J Joined: Jun 2015 Posts: 5,918 West Texas	Originally Posted By: Matt Hejl I have never used the scope, but if I mount it and look down it at a range...will I be able to tell if its set correctly by simply just focusing on things at different distances and seeing if its sharp? Yes, but you must focus the reticle first. Point the scope at the sky, focus the reticle until it's sharp. Then focus down range using the AO.

Re: Parallax question [Re: Jgraider] #6453560 09/15/16 06:22 PM
Joined: Nov 2012 Posts: 15,637 Lubbock, TX Q QuitShootinYoungBucks THF Celebrity
QuitShootinYoungBucks THF Celebrity Q Joined: Nov 2012 Posts: 15,637 Lubbock, TX	Originally Posted By: Jgraider Originally Posted By: Matt Hejl Originally Posted By: QuitShootinYoungBucks They seem to be in order to me???? 50 100 150 2(00) 3(00) 4(00) 5(00) 6(00) Infinity The 100 is to the left of the 150 mark, and the 50 is to the right of infinity. If I were guessing I'd bet you cannot just spin this AO around without it stopping somewhere (infinity), correct? If so, set it on the 50 and look at something 50 yds to see if it's in focus, then repeat at each distance. Once you get to infinity, I bet you can't just spin it over to 50, you'd have to reverse the twist all the way back around to 50 and start over. Clear as mud now? It's a circle, right? Is 50 to the left of 100? List JGR said, I bet you can't spin it past infinity, you have to go all the way back around. If you can spin it past infinity, I'd throw it in the trash. https://web.archive.org/web/20170223065011/http:/www.rrdvegas.com/silencer-cleaning.html

Re: Parallax question [Re: Matt Hejl] #6453632 09/15/16 07:22 PM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	I'd verify where the stops are when you turn it to the limits in each direction to see if the adjustment ring has slipped. "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: Matt Hejl] #6453748 09/15/16 08:25 PM
Joined: Jan 2011 Posts: 2,394 Justin, TX B booradley Veteran Tracker
booradley Veteran Tracker B Joined: Jan 2011 Posts: 2,394 Justin, TX	Originally Posted By: Matt Hejl I have never used the scope, but if I mount it and look down it at a range...will I be able to tell if its set correctly by simply just focusing on things at different distances and seeing if its sharp? You don't need to mount it, or take it to the range to do that. Don’t roll those bloodshot eyes at me.

Re: Parallax question [Re: Matt Hejl] #6453940 09/15/16 11:01 PM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	Now I can see the photos on my PC. In the top photo I see 150, 2(00), 3(00), 4(00) yard marks. In the middle photo I see 3(00), 4(00), 5(00), 6(00), infinity. In the bottom photo I see the 5(00), 6(00), and infinity and the 50 yard mark which you would get to by turning the adjustment all the way back the other way. There's nothing goofy about the layout of the markings. It could be that the external ring has slipped, but that does not make the AO unusable. Turn the objective all the way to through 4(00), 5(00), 6(00), and to infinity. Does it stop when you get to infinity, or go a little ways past it? "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: Matt Hejl] #6453953 09/15/16 11:10 PM
Joined: Sep 2016 Posts: 1,088 C Creedmoor Pro Tracker
Creedmoor Pro Tracker C Joined: Sep 2016 Posts: 1,088	Originally Posted By: Matt Hejl I have never used the scope, but if I mount it and look down it at a range...will I be able to tell if its set correctly by simply just focusing on things at different distances and seeing if its sharp? NOPE. Parallax adjustment has nothing to do with focus. And it's hard to explain. Let's say that you have a target at 100 yards. When the parallax is adjusted properly, the reticle will remain fixed on the target when you move your eye side to side or up and down. If you move your eye and the reticle moves on the target, the parallax is not set correctly. There is a great explanation in an article that was written long ago by a professional in the optical business. I'll see if I can find it ......... Here you go: http://www.snipercountry.com/Articles/Parallax.asp I'd suggest that you bookmark the article and save it for future reference. . There's a fine line between BRAVE ... and STUPID. The two most important days in your life are the day you are born and the day you find out why.

Re: Parallax question [Re: Matt Hejl] #6453962 09/15/16 11:16 PM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	The simpler explanation of what the article is saying is that what you see looking "through" the scope is actually a real image suspended within the scope tube, and somewhere within that floating real image is the reticle of the scope. The AO moves the image to and fro within the scope tube so that some planar cross section of the image is in exactly in the same plane as the reticle, and that is where the "parallax-free" relationship between the reticle and the image exists. "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: RiverRider] #6454146 09/16/16 01:03 AM
Joined: Sep 2016 Posts: 1,088 C Creedmoor Pro Tracker
Creedmoor Pro Tracker C Joined: Sep 2016 Posts: 1,088	Correct. Problem is that to most people it's still clear as mud. . There's a fine line between BRAVE ... and STUPID. The two most important days in your life are the day you are born and the day you find out why.

Re: Parallax question [Re: RiverRider] #6454213 09/16/16 01:52 AM
Joined: Nov 2008 Posts: 9,952 TEXAS L LFD2037 THF Trophy Hunter
LFD2037 THF Trophy Hunter L Joined: Nov 2008 Posts: 9,952 TEXAS	Originally Posted By: RiverRider Now I can see the photos on my PC. In the top photo I see 150, 2(00), 3(00), 4(00) yard marks. In the middle photo I see 3(00), 4(00), 5(00), 6(00), infinity. In the bottom photo I see the 5(00), 6(00), and infinity and the 50 yard mark which you would get to by turning the adjustment all the way back the other way. There's nothing goofy about the layout of the markings. It could be that the external ring has slipped, but that does not make the AO unusable. Turn the objective all the way to through 4(00), 5(00), 6(00), and to infinity. Does it stop when you get to infinity, or go a little ways past it? The 100, 150, 2, 3, 4, 5, 6(00) is to the left of infinity & the 50 is to the right of infinity. To me, that makes no sense! R.I.P. CPO Matt Mills-(DEVGRU)- You will NEVER be forgotten! 10-25-75 / 8-6-11 K.I.A.

Re: Parallax question [Re: Matt Hejl] #6454237 09/16/16 02:11 AM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	It should stop as you pass through 5(00) to 6(00) and get to infinity, right? Then you turn it back the other way almost 360 degrees to get all the way back to 50 and it should stop again. Make sense? "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: Matt Hejl] #6454243 09/16/16 02:19 AM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	Just noticed this...look at the set screw: I could be wrong, but I'll bet that if things aren't currently lined up right, you could fix that by loosening that screw and repositioning the adjustment ring. There could be more than one set screw. "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: RiverRider] #6454328 09/16/16 03:27 AM
Joined: Nov 2008 Posts: 9,952 TEXAS L LFD2037 THF Trophy Hunter
LFD2037 THF Trophy Hunter L Joined: Nov 2008 Posts: 9,952 TEXAS	Originally Posted By: RiverRider It should stop as you pass through 5(00) to 6(00) and get to infinity, right? Then you turn it back the other way almost 360 degrees to get all the way back to 50 and it should stop again. Make sense? Well I'll be a monkey's uncle. That makes too much sense!!! I feel like a dumbass now! R.I.P. CPO Matt Mills-(DEVGRU)- You will NEVER be forgotten! 10-25-75 / 8-6-11 K.I.A.

Re: Parallax question [Re: Matt Hejl] #6454430 09/16/16 10:38 AM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	I think we all know that feeling! "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: Matt Hejl] #6456623 09/18/16 01:13 AM
Joined: Sep 2009 Posts: 2,959 Azle, TX C cxjcherokec Veteran Tracker
cxjcherokec Veteran Tracker C Joined: Sep 2009 Posts: 2,959 Azle, TX	You're starting point is the 50 mark (ie 50yds), most scopes won't adjust for parallax below that, some do but they are upwards of $2k The gap is a higher adjustment between 50 and 150 bc it's extremely hard to adj parallax at high power that close in range. Based on the purplish color I'd say it's an old leupold

Re: Parallax question [Re: Matt Hejl] #6456661 09/18/16 01:51 AM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	Originally Posted By: Matt Hejl Originally Posted By: RiverRider Maybe the pitch of the mechanism's threads are different on each side of infinity to aid finer adjustment. I've never seen one like that. What's the make? Redfield...its an older 6x-18x "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: Matt Hejl] #6456663 09/18/16 01:52 AM
Joined: Nov 2007 Posts: 9,516 Wise Co. R RiverRider THF Trophy Hunter
RiverRider THF Trophy Hunter R Joined: Nov 2007 Posts: 9,516 Wise Co.	So anyway, Matt, were you able to reposition the AO adjustment ring? "Arguing with you always makes me thirsty." -Augustus McRae

Re: Parallax question [Re: Matt Hejl] #6456741 09/18/16 02:49 AM
Joined: May 2011 Posts: 358 M Matt Hejl OP Bird Dog
OP Matt Hejl Bird Dog M Joined: May 2011 Posts: 358	Yes...it all seems lined up now. I just need to take out and shoot and see how the marks line uo wih actual distances. Thanks for the responses!

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