Optics Series - Magnified Optics (Pt.3/3)

Published on July 22, 2022
Duration: 9:03

This video provides an expert-level overview of magnified optics, covering their historical development, terminology, and practical applications. Instructors Danny and Jason explain concepts like magnification levels, objective lens diameter, reticle types (duplex, mil-dot, BDC), focal planes (FFP vs. SFP), and parallax adjustment. They highlight the advantages of magnified optics for competition, target shooting, hunting, and tactical scenarios, emphasizing how they improve aiming accuracy and target acquisition at various distances.

Quick Summary

Magnified optics enhance aiming by increasing target size and providing a reticle for precise aiming. Key terms include magnification range (e.g., 3-9x), objective lens diameter (e.g., 40mm), and reticle types like BDC or Mil-Dot. FFP reticles scale with magnification for consistent ranging, while SFP reticles remain fixed, offering a more economical option.

Chapters

  1. 00:00Introduction to Magnified Optics
  2. 00:16Advantages of Magnification
  3. 00:40History of Magnified Optics
  4. 00:56Fixed Power Optics Examples
  5. 01:42Magnified Optic Terminology Explained
  6. 02:18Variable vs. Fixed Magnification
  7. 02:41Scope Components: Objective, Ocular, Turrets
  8. 03:55Parallax Adjustment Explained
  9. 04:46LPVOs: Low Power Variable Optics
  10. 05:48BDC Reticles
  11. 06:06Types of Reticles
  12. 06:37Mil-Dot vs. MOA Explained
  13. 07:29First vs. Second Focal Plane (FFP vs. SFP)
  14. 08:03Choosing Between FFP and SFP
  15. 08:26Conclusion and Key Takeaways

Frequently Asked Questions

What is the primary benefit of using magnified optics on a firearm?

Magnified optics increase the size of the target image, providing a clearer and more precise aiming point. This significantly improves accuracy and effectiveness in situations requiring precise shot placement, such as competition shooting, long-range target practice, hunting, and tactical applications.

How do you interpret the numbers in a scope's magnification description, like '3-9x40'?

In a scope description like '3-9x40', the '3-9' indicates variable magnification, meaning you can adjust the power from 3x up to 9x. The '40' refers to the diameter of the objective lens in millimeters, which affects light gathering and image brightness.

What is the difference between First Focal Plane (FFP) and Second Focal Plane (SFP) reticles?

In FFP scopes, the reticle size changes proportionally with magnification, keeping subtensions consistent at all powers. SFP scopes have reticles that remain a fixed size, making them simpler and more economical but less ideal for ranging at all magnifications.

What is parallax, and why is it important to adjust for it in a scope?

Parallax is the apparent shift of the reticle relative to the target when the shooter moves their head. Adjusting for parallax ensures that the reticle and target are in the same focal plane, eliminating this shift and providing a clearer, more accurate aiming picture.

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