| 摘要 |
An adjustment device having a rotatable knob for changing an adjustable setting of an aiming device, such as a riflescope. The knob includes a removable indicator ring slidable onto the knob and bearing a scale to provide visual feedback to a shooter regarding an adjustment position of the adjustable setting. The knob further carries a releasable latch that may extend radially outward relative to the knob to retain the indicator ring on the knob when the latch is in the latched position. When the shooter desires to remove and replace the indicator ring, such as in response to a change in shooting conditions, the latch may be released to an unlatched position to allow the indicator ring to be moved off of the knob. The shooter may thereafter insert a replacement indicator ring on the knob. |
