Long Range Basics - 3 - First Focal Plane vs Second Focal Plane *english*

[Music] first focal plane brother second focal plane the difference about the first focal plane to the second focal plane the first focal plane means that the reticle in the scope is always in relation to the target when i zoom in the scope i also zoom in the reticle theoretically is coincident to my target always covering equal if it's a technical reticle like mil dot or more modern mil reticle I can always work with it how we do that come soon we come first to the second focal plane the second focal plane means that the reticle in the scope always has the same size to me and when zooming into the scope its constant only in one magnification depending on scope manufactures in reticle it is coincident to the target again in comparison the first focal plane always remains constant to the target the second is always constant to the scope and not to the target the second focal plane make sense in the case of a simple cross heretical or simple hunting reticle since I do not have to enlarge it and I can calculate with it but with the tactical reticle as a mil dot which should help me to make my calculations the reticle would be only at one magnification coincident to my target that means it cover my target correctly the problem is this is mostly in the highest magnification this can quickly become useless since the highest Tsun is not the best light in scopes in hunting or long-range situations i would like to adjust the magnification that i can capture the target and its surroundings cleanly or sometimes require the light conditions or to strongly rush that i have to zoom out a bit if i have now a mil dot in a second focal plane i can not calculate with this and it's almost useless the most always says the second focal flame is finer than the first focal plane that was also before when the reticles were usually rough but nowadays this is different have a look with the first focal plane in the technical reticle we can make a lot of things we can calculate distances calculate the size of a target and correct or hit by de reticle distance calculation with the first focal plane this development came naturally from the military use to the reticle we take a classic mil dot there's an exact distance between the points of 1 mil so points enter to point Center or point top to point op is 1 mil the point is zero point 2 mil so our between the points exactly zero point eight mil let's start with it the main formula for calculations the distance is height of the target in metres by 1,000 divided in Mills is the distance in meters now also a mill reticle make sense for users they use yards because the unit of the height can be replaced and thus the distance in this unit is calculated so it would be also possible high of the target in yards by 1,000 divided in Mills is distance in yards let us start with this large objects we have in urban areas many fixed values for example a door is mostly about 2 meter high or a window usually as a high of 1 meter so I am further away I can measuring the window or the door quick you calculate the distance of the building fits the window in exactly one bill then I assume that the window is 1 meter high I know that the house is exactly 1,000 meter away from me the 1 mil is 10 centimeters 100 meter 20 centimeters on 200 meter and thus 1 meter of thousand meter if I want to confirm this value I measure whether the door fits into mill because 2 meter on thousand meters are 2 mil if the window is too large the house stands at 500 meter if the window is 0.5 M the large the house stands at 2,000 meters height of the target in meters by 1,000 divided in Mills is the distance in meters modern radicals are so finer than anil dot for example the reticle APRs has instead of dots fine hash marks in 0.2 mils increments as well as additional marks for the windage now let us determine the distance of a man's target in military use there are some rules for determining the distance from a man one mill i 2i is 150 meter one mill shoulder-width 500-meter one step to gin 800-meter windows step to eye height 900 meter and one step to the head tip 1000 beta these values were based on the main size of 1.78 meter since most of the viewers don't need military calculations for themselves we can still use the first focal plane for hunting for example for the distance calculations on the game this should not animate also to give shots at this distance but can simply contribute to perhaps still stalk a few meters or just keep the finger straight repeat the main formula for calculating the distance is high off the target by 1000 divided in Mills this of course also on the length or the width of a target let us assume we know the high of the game we take for example robach we say this has a shoulder height of about 70 centimeters since we know that 1 mil is 10 centimeters on 100 meter the robot would be with 70 centimeter shoulder high 7 words when the robot is at 100 meter the calculations would be the high of the target 0.7 meter by 1,000 divided in 7 Mills is 100 meter if it's where 3.5 mils it would be 200 meter way and so on now a short test fits the back in 1.5 mil if you how far away high of the target 0.7 meter by 1000 divided in 1.5 mil is 466 meter you can also just make a list here to get a quick overview save it on your mobile phone or grab it on the gun the list could look something like this robot shoulder high 0.7 meter 7 Mills is 100 meter 6 meter is 160 meter 5 mill is 140 meter and so on and so on and so on no matter if for crow folks if you know the high of the target you can make sure with a typical reticle how the distance to the target is let's go to the second point size estimation at known distance we can also calculate the game size if we already know the distance as an example immediately to know whether the game is big or small we have an example or laser rangefinder or fit at a favorite corner at the hunting area and know exactly that the woods are exactly 100 meter way if the bug stand at the edge of the forest and I want to know how big it is I go the other way around the calculation here would be distance measured by mil Reed divided by 1000 is the high of the target so example with a robot 100 meter measure distance by seven notes divided by 1000 is 0.7 meter higher or 200 meter by 3.5 mill divided by 1000 is 0.7 hi practice these things by examples for example the high of the hunting canopy or the diameter of a tree let's take this example I know the tree is 300 meter far away from me and I have it in 1.2 mil how thick is the tree 300 meter measure distance by 1.2 mil divided by 1,000 is 0.36 meter or 36 centimeter let's go to the last and simplest point impact correction it is recommended to have a meal reticle with mil clicks then we cannot only measure but correct everything directive for example 10 clicks for this shot we can also hold one mil over it if one click is one centimeter at 100 meter 10 clicks are 1 mil that means we can adjust ten clicks on the scope or just ten clicks in the reticle so one mil over it if we had to make fifteen clicks it would be 1.5 mil 20 clicks would be to move the same is true for the wind correction let's say our target is on 500 meter and the wind blows from left to right 90 degrees from us with four meter per seconds my example weapon is zeroed at a 100 meter I have a correction of 153 centimeter which would be thirty point seven klicks or sweet point zero seven mil and the horizontal wind correction of 56 centimeters which would be 11 clicks so one point one milk an adjust the various at goal or just corrected in the reticle just modern reticle with the further wind correction make it simply here I know I must hold over 3.07 notes and 1 point 1 mil against wind this is much faster than clicking so let's get together I have a quasi reticle and I would like to shoot on the static the second focal plane is okay for me wherever handing scope with a cross dot reticle taking focal plane is also enough but if I have a technical reticle I want to calculate distances size of the target or my short correction the first focal plane is definitely or favorite by now some of you will notice how strange it is that even picks co-produce yourself copes with mil-dot reticles with mil marks in the second focal plane and quarter more clicks confusion edits best something to the clicks of the scope many questions still ask us in which direction they should click when they zero the scope a lot of things come together with the sentence like the reticle wandering against something simple rule note click where the impact has to go I have a low hit the hole must come higher so I turn up if the shot is too far to the left the hole must be more right so I turn right this works even without making a shot if the wind comes from left to right my shot would naturally be further to the right so I'm turning the wind correction to the left so against wind I hope I could bring you a little light in the dark please practice and check everything on the shooting range before you're starting something like this on any mode thanks for watching bye

Channel: German Gun Club

Views: 53,297

Keywords: ffp, sfp, firstfocalplane, secondfocalplane, erste bildebene, zweite bildebene, scope mounts, rail, 20moa, icline, Tutorial, MOA, MIL, MRAD, MILRAD, MILRADIAN, minute of arc, zielfernrohr, scope, sniper, scharfschütze, long range, longrange, long range basics, tikka, 6.5creedmoor, 308, german gun stock, germangunstock, minute of angle

Id: bfqFA9b67q4

Length: 12min 3sec (723 seconds)

Published: Wed Jun 21 2017