This will help some of you that's got fixed power centrefire scopes on your rifles of which the parallax is factory set at 100 yards and you might be doing most of your shooting at say 30 metres or even closer. I dont know if a simmular thread was posted earlier so here it goes. I've first tested it myself to see if it really does work, and it does. I've got a Lynx 8X56 IR scope not mounted on a rifle as yet, must still buy a hunting rifle, and used this scope to test the parallax adjustment.
Last night I've taken aim on my son sitting on the couch watching tv, 8 metres away, with only the scope in my hand. He was a total blur. You could just see the colour of his t-shirt. Well then I started to adjust the scope as explained on the links below. I have not counted how many times I had to rotate the lens in its housing, but it was a few complete turns. Its worked perfectly. I've put the scope on my Ranchero and could shoot the same groups that my Leapers Bugbuster could manage at a near perfect parallax setting. This was at only 10 metres, with an 8X centrefire scope which was just a few minutes ago totally useless at even 15 metres...
I'm sure there are a few guys out there with 4X or 6X fixed power scopes, parallax corrected for 100 yards, on their airguns or even .22's, who dont shoot past 60 metres 99% of the time. This will most definately make a difference for you as I've previously had a Tasco 4X40 World Class scope on my Gamo Hunter 440 and the reticle could not hold focus when targetshooting at ten metres. I wished I knew this at that time.
Here is the links:
No tools were needed for the Lynx scope. I could turn everything by hand but not so with my small Leupold. I will have to take it of the gun and maybe get a tool for doing the same to it.