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second focal plane
In mathematics, the eccentricity of a conic section is a non-negative real number that uniquely characterizes its shape.
More formally two conic sections are similar if and only if they have the same eccentricity.
One can think of the eccentricity as a measure of how much a conic section deviates from being circular. In particular:
The eccentricity of a circle is zero.
The eccentricity of an ellipse which is not a circle is greater than zero but less than 1.
The eccentricity of a parabola is 1.
The eccentricity of a hyperbola is greater than 1.
The eccentricity of a pair of lines is
∞
{\displaystyle \infty }
View More On Wikipedia.org
More formally two conic sections are similar if and only if they have the same eccentricity.
One can think of the eccentricity as a measure of how much a conic section deviates from being circular. In particular:
The eccentricity of a circle is zero.
The eccentricity of an ellipse which is not a circle is greater than zero but less than 1.
The eccentricity of a parabola is 1.
The eccentricity of a hyperbola is greater than 1.
The eccentricity of a pair of lines is
∞
{\displaystyle \infty }
View More On Wikipedia.org
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Price drop! Just in time for Christmas! Athlon Optics Talos 4-16x40 Second Focal Plane Riflescope
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- For Sale
- $100
- Lynnwood
- Washington
Brand new scope! Fully multi-coated lenses gives you better light transmission to bring optimum brightness and true color across the entire light Spectrum Reticle etched on the Glass that provides excellent backing support for complex reticle design and offers great durability and much...- Classified Ad
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Schmidt & Bender PMII, 5-25-56 MOA, SFP, P4FL retical
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- For Sale
- $2600
- Rainier
- Washington
Use the honor, bench rest gun only. Has Tenebraex scope caps and a aadland throw lever. The only marks on the scope are around the windage turret, and one very small Merc on the elevation turret, form my safe and being in the case $2950. The listing does not include the sphur mount. Will trade...- Classified Ad
- Sight, Scope, & Optic Classifieds
- aidenarms
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