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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Tube diamiter?
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<blockquote data-quote="bruce_ventura" data-source="post: 634819" data-attributes="member: 34084"><p>Read recently that the reason is mechanical. A 6X magnification range requires that lenses in the erector tube move further than for a 4X range. The power ring translates lenses via helical slots. </p><p></p><p>A single rotation of the power ring on a 1" tube cannot move lenses far enough for 6X. The helix angle in the translation mechanism would be too steep, requiring excessive torque. The same rotation of the power ring on a 30 mm tube can, however.</p></blockquote><p></p>
[QUOTE="bruce_ventura, post: 634819, member: 34084"] Read recently that the reason is mechanical. A 6X magnification range requires that lenses in the erector tube move further than for a 4X range. The power ring translates lenses via helical slots. A single rotation of the power ring on a 1" tube cannot move lenses far enough for 6X. The helix angle in the translation mechanism would be too steep, requiring excessive torque. The same rotation of the power ring on a 30 mm tube can, however. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Tube diamiter?
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