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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Reticles on frontr rear focal plane, why?
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<blockquote data-quote="DMCI" data-source="post: 18901" data-attributes="member: 1730"><p>I agree with Randy in VA, this is a complex subject, but let me see if I can distill it down.</p><p></p><p><strong>1. Rear(2nd)Focal Plane Variables: (Leupold and other US manufacturers)</strong></p><p></p><p>a. Reticle is same size at any magnification. Mil Dot subtension changes with power.</p><p></p><p>b. Scope good for hunting without ranging because of same size reticle at any power.</p><p></p><p>c. Reticle not best for ranging and/or Mil Dots. Often calibration is required to see at what power "mil dots" are Mildots.</p><p></p><p>2. <strong>Front(1st) Focal Plane Variables: (S&B, USO, and many European Scopes, not for US market.)</strong></p><p></p><p>a. Reticle changes size with power. Not best for hunting because reticle can grow and cover target. Europeans have developed special reticles to address this issue such as post, etc.</p><p></p><p>b. Good for MilDot reticle because subtension is the same for any power. A Mil is a Mil regardless of magnification setting.</p><p></p><p>c. Disadvantage is that with low power, reticle can become very small, so dots, etc are difficult to see.</p><p></p><p>There you have it in a nutshell.</p><p></p><p>[ 04-01-2004: Message edited by: DMCI ]</p></blockquote><p></p>
[QUOTE="DMCI, post: 18901, member: 1730"] I agree with Randy in VA, this is a complex subject, but let me see if I can distill it down. [B]1. Rear(2nd)Focal Plane Variables: (Leupold and other US manufacturers)[/B] a. Reticle is same size at any magnification. Mil Dot subtension changes with power. b. Scope good for hunting without ranging because of same size reticle at any power. c. Reticle not best for ranging and/or Mil Dots. Often calibration is required to see at what power "mil dots" are Mildots. 2. [B]Front(1st) Focal Plane Variables: (S&B, USO, and many European Scopes, not for US market.)[/B] a. Reticle changes size with power. Not best for hunting because reticle can grow and cover target. Europeans have developed special reticles to address this issue such as post, etc. b. Good for MilDot reticle because subtension is the same for any power. A Mil is a Mil regardless of magnification setting. c. Disadvantage is that with low power, reticle can become very small, so dots, etc are difficult to see. There you have it in a nutshell. [ 04-01-2004: Message edited by: DMCI ] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Reticles on frontr rear focal plane, why?
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