In an optical imaging lens, a first lens element has negative refracting power, a second lens element has negative refracting power, an optical axis region of the object-side surface of the third lens element is concave, an optical axis region of the object-side surface of the fourth lens element is convex, an optical axis region of the object-side surface of the fifth lens element is convex, a sixth lens element is arranged to be a lens element in a second order from an image-side to an object-side and a seventh lens element is arranged to be a lens element in a first order from the image-side to the object-side to satisfy: (G23+T3+T4+G45)/L57≥2.700 and 1+2≤80.000.

An image of a field of view is captured by the endoscope and a portion of the image is displayed on a display. A popup image is generated and displayed upon image analysis identification of an occurrence of bleeding or motion of edges of an incision that is within the field of view, but outside the portion of the field of view displayed on the display.

An image of a field of view is captured by the endoscope and a portion of the image is displayed on a display. A popup image is generated and displayed upon image analysis identification of an occurrence of bleeding or motion of edges of an incision that is within the field of view, but outside the portion of the field of view displayed on the display.

A tethered imaging camera encapsulated in a shell lens element of such camera enables viewing from inside and imaging of a biological organ in/from a variety of directions. A portion of camera's optical system together with light source(s) and optical detector mutually cooperated by housing structure inside the shell are moveable/re-orientable within the shell to vary a desired view of the object space without interruption of imaging process. A tether carries electrical but not optical signals to and from the camera and controllable traction cords to move the camera, and a hand-control unit and/or electronic circuitry configured to operate the camera and power its movements. Method(s) of using optical, optoelectronic, and optoelectromechanical sub-systems of the camera.

An image capture system for enhanced electronic image stabilization (EIS) includes an image capture device and an adapter lens. The image capture device includes an image sensor, a lens housing, a processor, and a lens assembly that includes a first group of optical elements disposed within the lens housing. The first group of optical elements are used project an image onto the image sensor. The processor performs EIS. The adapter lens is used to enhance EIS of the image capture device. The adapter lens has an adapter lens housing that interfaces with the lens housing. The adapter lens has a second group of optical elements disposed within the adapter lens housing. The second group of optical elements are used to project the image as an image circle on the image sensor.

A wide-angle lens assembly includes a first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth lenses. The first and second lenses are meniscus lenses with negative refractive power. The third and ninth lenses are with negative refractive power. The fourth lens is with refractive power and includes a concave surface facing an object side. The fifth, sixth, and eighth lenses are with positive refractive power. The seventh lens is with refractive power and includes a concave surface facing the object side. The tenth lens is with refractive power and includes a concave surface facing an image side. The wide-angle lens assembly satisfies: 6<f.sub.5/f<8.5; wherein f.sub.5 is an effective focal length in mm of the fifth lens and f is an effective focal length in mm of the wide-angle lens assembly.

A wide-angle lens assembly includes a first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth lenses. The first and second lenses are meniscus lenses with negative refractive power. The third and ninth lenses are with negative refractive power. The fourth lens is with refractive power and includes a concave surface facing an object side. The fifth, sixth, and eighth lenses are with positive refractive power. The seventh lens is with refractive power and includes a concave surface facing the object side. The tenth lens is with refractive power and includes a concave surface facing an image side. The wide-angle lens assembly satisfies: 6<f.sub.5/f<8.5; wherein f.sub.5 is an effective focal length in mm of the fifth lens and f is an effective focal length in mm of the wide-angle lens assembly.

The present disclosure discloses an imaging apparatus and an electronic device. The imaging apparatus includes a macro lens group, a wide-angle lens group, and a telephoto lens group. An effective focal length f.sub.A of the macro lens group, an effective focal length f.sub.B of the wide-angle lens group and an effective focal length f.sub.C of the telephoto lens group satisfy: f.sub.A<f.sub.B<f.sub.C, 0.20<f.sub.A/f.sub.B<0.80 and 0.10<f.sub.A/f.sub.C<0.50.

The present disclosure discloses an imaging apparatus and an electronic device. The imaging apparatus includes a macro lens group, a wide-angle lens group, and a telephoto lens group. An effective focal length f.sub.A of the macro lens group, an effective focal length f.sub.B of the wide-angle lens group and an effective focal length f.sub.C of the telephoto lens group satisfy: f.sub.A<f.sub.B<f.sub.C, 0.20<f.sub.A/f.sub.B<0.80 and 0.10<f.sub.A/f.sub.C<0.50.

A lens module, constructed to include all necessary filters but retaining its wide-angle characteristic and short focal length, is comprised of a housing, a cover plate, and a filter switcher. The housing and the cover plate form a receiving cavity, the cavity containing the filter switcher. The filter switcher includes holder, two mounting frames, two first adhesive layers, and two filters, and is of minimal thickness. The two first adhesive layers fix the filters on the two mounting frames. An enlarged installation space within the lens module is not required. The disclosure also relates to an electronic device using the lens module.