First vs.Second Focal PlaneThe basic difference between first and second focal plane riflescopes.
Vortex 2x Binocular DoublerLightweight and easy-to-carry, the doubler is a great glassing tool.
Binocular Numbers - What do they mean?Power and size of a binocular.
Binocular collimation/alignmentA quick way to check collimation and why it's important.
Binocular diopter adjustmentWhy it's important and how to make adjustments.
Vortex Binocular Tripod AdapterAdvantages of mounting your binocular on a tripod and how to do it.
Cleaning optic lensesLens care tips and Vortex cleaning products.
ED glassThe advantages of ED glass and reducing color fringing.
Exit pupilCalculation and its relationship with brightness.
External foggingTips for preventing external fogging.
Eyecups, eye relief, eye glassesHow to use the eyecups to get the most out of your binoculars.
Field of viewWide or narrow? What's right for you?
Important binocular featuresFiner points to consider when choosing a binocular.
Interpupillary distanceSetting the interpupillary distance, made easy with the Binoc-Loc.
Lens coatingsWhy quality coatings deliver brighter images and better color.
Optics mythsCommon optics myths, misconceptions and gimmicks.
Phase correctionWhat phase correction does and how it works.
Roof vs porro prismFeatures, advantages and benefits of roof and porro prism binoculars.
Spotting scopes: angled vs straightWhat scope body style works best?
Spotting scopes: size vs weightPick the right size spotting scope for your applications.
WaterproofingExplanation of waterproof, water resistant and weatherproof optics.
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