Grump
We'll discuss repeatability and reliability of reticle adjustments later.*
I'm calling Tasco about the AO on one scope still showing reticle movement at something past the "infinity" setting, and more apparent movement horizontally than vertically. OK, it *is* a $150 or so scope bought on discount, but...come on!
Then there's the old Weaver 3x9x40 I've sent back for repair twice. First one was the plastic zoom tit crumbled (the one that travels in that 180-degree cut in the scope tube). THEN one of the crosshairs broke and I also asked for the parallax to be taken out. Checked it on the prior trip, and its parallax is maybe a half inch, again more horizontal than vertical, but with a big jump to something bigger as I move my eye past about halfway towards the image-loss point.
Both of these are variables, and both of them have the crosshairs moving with the eye movement--move right and the crosshairs move right.
What direction does which lens go when adjusting parallax from moving with towards zero and then moving opposite the direction of eye displacement? The design of the AO scope makes it hard to tell, but it *looks* like going out or away from the ocular lens moves it from being "close" to "far"
I'd like to understand the optical physics of the system, so to speak. I do grasp the foundational element of placing the reticle on a focal plane.
*Last time I was out, I used an AO scope which STILL appeared to have about 1/2-inch parallax at 100 yds, fired a 1-inch group (.308 reloads) outside the center square, put 5 or 6 clicks left on, fired one shot called 1/2-inch left into the center of the bull, and then dropped the remaining 4 shots inside the first group. 9 shots in just under an inch....
I'm calling Tasco about the AO on one scope still showing reticle movement at something past the "infinity" setting, and more apparent movement horizontally than vertically. OK, it *is* a $150 or so scope bought on discount, but...come on!
Then there's the old Weaver 3x9x40 I've sent back for repair twice. First one was the plastic zoom tit crumbled (the one that travels in that 180-degree cut in the scope tube). THEN one of the crosshairs broke and I also asked for the parallax to be taken out. Checked it on the prior trip, and its parallax is maybe a half inch, again more horizontal than vertical, but with a big jump to something bigger as I move my eye past about halfway towards the image-loss point.
Both of these are variables, and both of them have the crosshairs moving with the eye movement--move right and the crosshairs move right.
What direction does which lens go when adjusting parallax from moving with towards zero and then moving opposite the direction of eye displacement? The design of the AO scope makes it hard to tell, but it *looks* like going out or away from the ocular lens moves it from being "close" to "far"
I'd like to understand the optical physics of the system, so to speak. I do grasp the foundational element of placing the reticle on a focal plane.
*Last time I was out, I used an AO scope which STILL appeared to have about 1/2-inch parallax at 100 yds, fired a 1-inch group (.308 reloads) outside the center square, put 5 or 6 clicks left on, fired one shot called 1/2-inch left into the center of the bull, and then dropped the remaining 4 shots inside the first group. 9 shots in just under an inch....