@Walkalong Great! Just when I thought I understood parallax, you send me back to researching, lol. So it seems the diopter (on the focus objective end of the scope) adjusts the focus/clarity of the reticle, but what actually physically moves when you change the side focus knob to account for parallax? One of the lenses?
Parallax Adjustment On Scopes Without AO
- Thread starter Phydeaux642
- Start date
- Status
The diagram in this article makes it look like the reticle in a 2nd focal plane scope stays put, while the reticle in a 1st focal plane scope is in the erector which moves.
Dunno. Maybe I was thinking old school 2nd focal plane scopes that I grew up with. Maybe someone can enlighten us.
Dunno. Maybe I was thinking old school 2nd focal plane scopes that I grew up with. Maybe someone can enlighten us.
Well, you are kind of correct depending on how you think about it. The reticle is housed in the erector assembly. That erects and magnifies the image as well as providing the aiming point (reticle). The turrets move the erector around to provide POI change as desired.
Varminterror
Member
- Joined
- Jul 17, 2016
- Messages
- 14,900
Just a little fun update: I received a call this morning from Vortex, the tech rep was calling back - after spending 20min or so on the phone with me doing that little experiment on Friday - as he had asked several of the other technicians and engineers this morning when they got back into the office. Apparently it was a bit of a scuttlebug around the building, and several of them offered opinions - ALL agreeing that increasing magnification does not increase parallax error potential, and even going back through the same experiment together to confirm…
Kinda tells me the kind of folks who work at Vortex - folks who care enough to know their gear, know our sport/hobby/industry, and care enough to discuss and even return a call to a customer about a random, non-Vortex-specific question, just to share the info (even though my question was thoroughly answered last week). Makes me wanna buy a Razor Gen III just to tip my hat.
Kinda tells me the kind of folks who work at Vortex - folks who care enough to know their gear, know our sport/hobby/industry, and care enough to discuss and even return a call to a customer about a random, non-Vortex-specific question, just to share the info (even though my question was thoroughly answered last week). Makes me wanna buy a Razor Gen III just to tip my hat.
Timely topic for me. I have a Primary Arms scope in the mail and they told me 100 yd fixed parallax. They replied to my email after I placed order. They really should have this info on the site with the other specs.
Anyway, I shoot indoors at 25 yards. So I assume I'll have to return it?
Anyway, I shoot indoors at 25 yards. So I assume I'll have to return it?
Most centerfire rifle scopes are set parallax free at 100 yards, some at 150.
Rimfire scopes are set parallax free at 50 yards.
There are more and more parallax adjustable adjustable scopes out there that will focus down to 25 yards, that would be your best option if shooting from 25 yards to 100/150/200 yards.
Rimfire scopes are set parallax free at 50 yards.
There are more and more parallax adjustable adjustable scopes out there that will focus down to 25 yards, that would be your best option if shooting from 25 yards to 100/150/200 yards.
Ive run big game scopes on .22 rf for decades.
25 yards....4x is about max to keep focus
50 yards.....6x.
I may redo my Leupold VX1 3-9x for shorter.
Does fine for hunting up to 6x at 50 yd since I shoot most everything offhand....so my style keeps things at lower mag.
However Im not diggin my 4-12x AO Leupold on my .243. its got the fine duplex and adj turrets. Might be better for messing around on the bench.
My .243 is a walking yote/ deer rifle and a reg 3.5 -10x seems better.
Did have an older 4-12x AO on a 1022 target build and at 12x got sub half inch at 50 for 5 shots without much effort.
Match ammo, decent scope, good bbl.
Trying to play that game w lesser gear might be fun, but dont expect miracles.
IMHO AO and 12x are the min to play groups at 50 or farther.
Have 10X AO on two Ruger single shots and theyre good for hunting but just a little lacking on the bench at 100.
My 541T HB was a nice combo w gloss 4-12xAO. Ran that scope on a single shot Anschutz too.
Would like to try. 6-18x.
But honestly, a fixed scope would be better.
Target shooting w AO....itd be cranked to max all the time.
For a hunting .22 rifle.....a 6X AO might be the berries. They be silly priced.
Yrs ago Simmons had a 2-7x AO yarget turret compact. It wasnt the most pretty but it worked great ( had on 1022 DSP ). The ocular lens wasnt set the deepest and glare was a bit of a pain now and then.
Sold it on the rifle since it group shifted and cost me a whopper chuck.
Have only seen that scope once since, on an auction site. Simmons used to be OK back in the early 90s. I wouldnt buy anything Simmons or Tasco ever again.
Dunno who makes a decent scope for a bargain price now. The Bushnell.Banners were OK 15 yrs ago, but the crosshairs were a bit thick. They werent Chinese made then.
25 yards....4x is about max to keep focus
50 yards.....6x.
I may redo my Leupold VX1 3-9x for shorter.
Does fine for hunting up to 6x at 50 yd since I shoot most everything offhand....so my style keeps things at lower mag.
However Im not diggin my 4-12x AO Leupold on my .243. its got the fine duplex and adj turrets. Might be better for messing around on the bench.
My .243 is a walking yote/ deer rifle and a reg 3.5 -10x seems better.
Did have an older 4-12x AO on a 1022 target build and at 12x got sub half inch at 50 for 5 shots without much effort.
Match ammo, decent scope, good bbl.
Trying to play that game w lesser gear might be fun, but dont expect miracles.
IMHO AO and 12x are the min to play groups at 50 or farther.
Have 10X AO on two Ruger single shots and theyre good for hunting but just a little lacking on the bench at 100.
My 541T HB was a nice combo w gloss 4-12xAO. Ran that scope on a single shot Anschutz too.
Would like to try. 6-18x.
But honestly, a fixed scope would be better.
Target shooting w AO....itd be cranked to max all the time.
For a hunting .22 rifle.....a 6X AO might be the berries. They be silly priced.
Yrs ago Simmons had a 2-7x AO yarget turret compact. It wasnt the most pretty but it worked great ( had on 1022 DSP ). The ocular lens wasnt set the deepest and glare was a bit of a pain now and then.
Sold it on the rifle since it group shifted and cost me a whopper chuck.
Have only seen that scope once since, on an auction site. Simmons used to be OK back in the early 90s. I wouldnt buy anything Simmons or Tasco ever again.
Dunno who makes a decent scope for a bargain price now. The Bushnell.Banners were OK 15 yrs ago, but the crosshairs were a bit thick. They werent Chinese made then.
@Varminterror I really appreciate your research into this discussion. Super helpful! I was doing some calculations with the equation you referenced for maximum parallax error, and am I correct in assuming that the maximum error the equation produces would be the potential error distance you would observe if you moved your eye from one extreme side of the scope to the other? So in practical application, would you take half that answer and used it as a radius around the center of your target to conceptualize how far from the bullseye you might miss? So if the equation yields a potential parallax error of 3", would that be a maximum of 1.5" off axis each direction? Not sure if I'm conceptualizing that correctly...
Varminterror
Member
- Joined
- Jul 17, 2016
- Messages
- 14,900
- Status
Similar threads
- Locked