An attachment of a smartphone for a film camera disclosed herein includes: a camera attachment (31) to be attached to a camera back lid portion; and a smartphone attachment (32) coupled to the camera attachment (31) to hold a smartphone. The camera attachment (31) includes a projection screen (312) on which an image that is photographed is projected through a camera lens. The smartphone attachment (32) includes a correction lens (322) to focus on the image projected on the projection screen and allow a smartphone camera to photograph the image by close photographing. The attachment of a smartphone for a film camera aligns the camera lens, the projection screen, and the correction lens along an optical axis (5) of image capturing of the camera and focuses on an imaging medium of the smartphone to allow the image photographed by the film camera to be digitized and stored.

An image capture device is described that includes a body; a mounting structure that is connected to the body; an integrated sensor-lens assembly (ISLA) that defines an optical axis and extends through the body and the mounting structure; and an accessory that is releasably connectable to the mounting structure via rotation through a range of motion less than approximately 90 degrees. The mounting structure and the accessory include corresponding angled bearing surfaces that are configured for engagement such that rotation of the accessory relative to the mounting structure creates a bearing effect that displaces the accessory along the optical axis to thereby reduce any axial force required during connection and disconnection of the accessory.

The disclosure provides a mobile terminal. A device housing of the mobile terminal includes a light-permeable portion and an external connection portion whereby an external lens assembly is able to positioned and mounted on an external connection region of the mobile terminal, and can cooperate with an image sensor assembly arranged inside a first assembly space in the device housing to achieve a shooting function.

The disclosure provides an adapter. The adapter includes a first connection structure and a second connection structure, wherein the first connection structure is capable of being assembled and matched with an external lens, such that an access plane of the external lens matches with a preset end surface of a light passing channel, and the second connection structure is capable of being assembled and matched with a mobile terminal, such that a distance between the preset end surface and a photosensitive plane is equal to a flange focal length of the external lens.

A removable optical attachment has an angular field-of-view-changing optic that simultaneously extends over an objective lens for a first camera and an objective lens for a second camera.

There is provided converter lens system including a first lens that is a negative lens of which both surfaces are concave, a second lens that is a negative lens of which both an image plane side and an object side are convex toward an object side, and a third lens that is a positive lens of which both sides are convex. The first to third lenses are disposed in this order from the object side, and the converter lens system is inserted and used between an imaging lens and a camera.

A reflection module capable of image stabilization includes a reflecting element, a rotatable holder, a fixed base, a spherical supporting structure, an auxiliary supporting structure and an image stabilizing actuator. The reflecting element having a reflecting surface for folding optical path of incident light is disposed on the rotatable holder. The fixed base is connected to the rotatable holder via an elastic element. The spherical supporting structure is disposed between the rotatable holder and the fixed base. The auxiliary supporting structure disposed on at least one of the rotatable holder and the fixed base and corresponds to the spherical supporting structure. At least part of the image stabilizing actuator is disposed on the rotatable holder for driving the rotatable holder to rotate by taking the spherical supporting structure as rotation center. The spherical supporting structure is a ball having at least three contact points with the auxiliary supporting structure.

Provided is an application program (app) for functioning a dermoscope, a dermoscope adapter, and a smartphone as a dermoscope. A dermoscope 100 for observing skin tissue according to the present invention includes a smartphone 110 including a camera 111 and a photoflash 107 and being communicable, and being capable of instructing from a graphical user interface displayed on a liquid crystal display; a case 101 containing the smartphone 110 and including a base member 103 fixed on a side opposite to a liquid crystal display to operate the smartphone 110; and an observation adaptor 102 detachably retained on the base member 103; wherein the camera 111 performs photographing through a first circular polarization filter 106; wherein the base member 103 movably retains a second circular polarization filter 108 for leading a polarization state of LED light emitted by the photoflash 107 to form circularly polarized light.

Provided herein is an optical protection element replacement system of a security camera device, including a security camera device and a replacement device. The lens of the security camera device is covered by a part of an elastic optical protection element. The processing unit compares the captured images with a preset condition, and generates a driving signal if the captured image does not match the preset condition. The replacement device includes a retrieving module and a dispensing module. The retrieving module pulls back a preset length of the elastic optical protection element based on the driving signal. The dispensing module accommodates and dispenses the elastic optical protection element. Therefore, the front side of the security camera device stays clean so that it may continuously provide high quality images. Further equivalent methods are also provided for the same purpose.

An apparatus including a camera optical element and a tactile indicator associated with the camera optical element for indicating a property of the camera optical element.