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How to improve view of mirage in long range target

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2008 at 04:29
cr500 View Drop Down
Optics GrassHopper
Optics GrassHopper


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I have been playing with using mirage to judge wind in long range target shooting and have heard about such things a modifier disks which reduce the objective size to darken the image and make mirage easier to see. I have played with focusing my scope short to get views of mirage before the target. Are there any other tricks and tips people have tried to improve the mirage image for wind reading?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2008 at 08:57
Dale Clifford View Drop Down
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assuming here you are talking 1000 to 1500 yds here, increasing the depth of field helps somewhat with long range mirage, as in your method, as well as ards (anti reflection devices) but they also darken then picture, in effect by "stopping down" the lens system. assuming here you don't want to reduce the power of magnification which is the easiest way. just read the wind velocity off the mirage, straight up 0-5 mph, if the mirage bubbles are moving accross the field of view and are large, 3-6, and as the wind increases the smaller the bubbles will become until they look more like , ripples. not very accurate but you only need from 0 to 20 mph after that who knows what the shot will do. bigger problem is the angle, can't tell from the bubbles or ripples, it could be directly in your face and 45 degrees off at the target as an example.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2008 at 15:19
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Interesting.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/16/2011 at 10:09
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Optics Apprentice
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What on is doing with the modifier disk is to reduce "aperture" of the lens so increasing the depth of field. Tactically I will prefer to leave the riflescope unchanged  and focus the spotting scope at a distance from 1/2 to 2/3 of the target to read better the wind
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/16/2011 at 10:40
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You do realize this is a three year old thread, right? and that it talks about target shooting?

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/16/2011 at 21:16
G Kurtz View Drop Down
Optics Apprentice
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Hi, yes ILya, thnx.  But the thread is not closed and maybe somebody still interested. Morevoer as far as I know is not convenvient - but not forbidden - to carry around a spotting scope in LRRS and/or the same concept/suggestion can apply to a good LRF binocular like Geovid or Swaro
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