An attachment assembly (300, 490) for use with one or more of a mobile device (406, 492) with a camera (408, 494) and a case for the mobile device (406, 492), the attachment assembly (300, 490) comprising: an attachment base (302, 460) configured to be secured to at least one of the mobile device (406, 492) and the case; and an attachment body (304, 430) including at least one optical device (344, 346, 348, 502, 504, 510) for use with the camera (408, 494) and configured to be removably secured to the attachment base (302, 460); the attachment base (302, 460) removably securing the attachment body (304, 430) to the at least one of the mobile device (406, 492) and the case when the attachment body (304, 430) is removably secured to the attachment base (302, 460) and the attachment base (302, 460) is secured to the at least one of the mobile device (406, 492) and the case; wherein a first one of the attachment base (302, 460) and the attachment body (304, 430) includes at least one rail (470, 472); and wherein a first other of the attachment base (302, 460) and the attachment body (304, 430) includes at least one groove (444, 446) configured to slidably receive the at least one rail (470, 472) to removably secure the attachment body (304, 430) to the attachment base (302, 460); characterized in that: a second one of the attachment base (302, 460) and the attachment body (304, 430) includes a tab with a detent; a second other of the attachment base (302, 460) and the attachment body (304, 430) includes a recess configured to receive the detent; with the tab in a first orientation, the detent engages the recess to prevent removal of the at least one rail (470, 472) from the at least one groove (444, 446); and with the tab in a second orientation, the detent is removed from the recess to allow removal of the at least one rail (470, 472) from the at least one groove (444, 446). an attachment base (302, 460) configured to be secured to at least one of the mobile device (406, 492) and the case; and an attachment body (304, 430) including at least one optical device (344, 346, 348, 502, 504, 510) for use with the camera (408, 494) and configured to be removably secured to the attachment base (302, 460); the attachment base (302, 460) removably securing the attachment body (304, 430) to the at least one of the mobile device (406, 492) and the case when the attachment body (304, 430) is removably secured to the attachment base (302, 460) and the attachment base (302, 460) is secured to the at least one of the mobile device (406, 492) and the case; wherein a first one of the attachment base (302, 460) and the attachment body (304, 430) includes at least one rail (470, 472); and wherein a first other of the attachment base (302, 460) and the attachment body (304, 430) includes at least one groove (444, 446) configured to slidably receive the at least one rail (470, 472) to removably secure the attachment body (304, 430) to the attachment base (302, 460); characterized in that: a second one of the attachment base (302, 460) and the attachment body (304, 430) includes a tab with a detent; a second other of the attachment base (302, 460) and the attachment body (304, 430) includes a recess configured to receive the detent; with the tab in a first orientation, the detent engages the recess to prevent removal of the at least one rail (470, 472) from the at least one groove (444, 446); and with the tab in a second orientation, the detent is removed from the recess to allow removal of the at least one rail (470, 472) from the at least one groove (444, 446). a second one of the attachment base (302, 460) and the attachment body (304, 430) includes a tab with a detent; a second other of the attachment base (302, 460) and the attachment body (304, 430) includes a recess configured to receive the detent; with the tab in a first orientation, the detent engages the recess to prevent removal of the at least one rail (470, 472) from the at least one groove (444, 446); and with the tab in a second orientation, the detent is removed from the recess to allow removal of the at least one rail (470, 472) from the at least one groove (444, 446).