69 results about "Digital single-lens reflex camera" patented technology

A wide angle lens especially suitable for digital single lens reflex cameras is described. The lens offers the advantages of superior performance while using fewer lens elements thus reducing size and cost to manufacture. The lens consists of two lens groups separated by an aperture stop. The first lens group consists of a meniscus lens and the novel use of a bi-concave lens element. The first group may also include a cemented doublet with novel ratios of refractive index and Abbe numbers. Embodiments of the wide angle lens satisfy conditional equations of 6≦BFL / f≦7.5 and 10<Σd / f≦21, where BFL is the distance from the most image side lens element surface to the image plane with the lens focused at infinity, f is the effective focal length of the wide angle lens and Σd is the distance from the most object side lens element surface to the most image side lens element surface.

The invention discloses a multisource multi-area-array GIS data acquisition platform for an unmanned vehicle. The multisource multi-area-array GIS data acquisition platform for the unmanned vehicle comprises a mobile carrying pan-tilt, a multisource multi-area-array sensor, a position, orientation and control module and a power supply device. A multisource multi-area-array rotating pan-tilt is installed on the unmanned electric vehicle through a supporting rod and a supporting platform. Mobile measurement is conducted through remote control. A photographic base can be adjusted at will when the platform acquires data. The platform can flexibly rotate by 360 degrees to operate in an area with the shape similar to a hemisphere. The special arrangement structure of the multisource multi-area-array rotating pan-tilt is an equilateral triangle, wherein ordinary cameras are arranged at the three end points of the equilateral triangle, a digital single lens reflex camera is arranged at the orthocenter of the equilateral triangle, and the multisource multi-area-array rotating pan-tilt has the most remarkable advantage of being capable of improving the automation and precision of data processing at the same time. A Kinect camera is additionally arranged, so that a multisource sensing mode is formed, and then GIS data synchronous acquisition can be conducted in combination with a DGPS / IMU. The multisource multi-area-array GIS data acquisition platform for the unmanned vehicle has the advantages of being scientific, flexible, high in accuracy, high in adaptability, efficient, reliable, high in cost-performance ratio, capable of greatly improving data acquisition efficiency and data post-processing efficiency and the like.

A digital single-lens reflex camera is configured for making it possible to reduce deterioration in image quality due to a camera shake or an object movement and to easily pick up an image with a good image quality. In a digital single-lens reflex camera (1), when an object speed is detected on the basis of a detected object movement, a body microprocessor (12) judges if the object speed is equal to a threshold value (A) or more and, if it is smaller than the threshold value (A), controls a conversion lens camera shake correcting device (82) in a conversion lens (2) or a camera body shake correcting device (75) in a camera body (3) to carry out the camera shake correction. Further, if the object speed is equal to or more than the threshold value (A), the body microprocessor (12) makes a digital signal gain setting unit (111) high in gain so as to increase the ISO sensitivity or makes a shatter speed faster to set a shorter exposure time and has a plurality of images continuously picked up under different exposure conditions.

This invention provides an alternative to a digital single lens reflex camera, by not providing a through-the-lens optical image for the viewer to preview, while providing a high resolution through-the-lens electronic image that has a resolution equivalent to at least 200 dpi when seen by the viewer through the eyepiece, such that the viewer can preview the external image that he wishes to capture at a quality that is equivalent to an optical image, in the absence of any corresponding optical reflective element in the camera. The advantage of the present invention is that the quality of preview image is maintained while solving some of the problems in an OVF.

An imaging lens SL mounted in a digital single lens reflex camera 1 is composed of, in order from an object side, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, and a third lens group G3 having positive refractive power, wherein upon focusing on a near-distance object point from an infinite-distance object point, at least one of the first lens group G1 and the second lens group G2 is moved so as to change a distance between the first lens group G1 and the second lens group G2, and the imaging lens satisfies a given conditional expression, thereby providing a downsized imaging lens suited to an imaging apparatus such as a single lens reflex camera, having a less of change in overall length and optimal to driving an intra-lens-barrel motor.

A digital single-lens reflex camera determines whether a predetermined time has passed since the start of display. If the predetermined time has not passed yet, the camera performs face detection to determine if a user is looking into an optical finder of the camera. When the face detection is performed, a system control circuit identifies the present content displayed. When the displayed content is an ordinary image, photographing information, or attention-seeking alert, display of the content is immediately stopped. When the displayed content is alert prohibiting imaging, it is checked whether a switch operation has been performed. If the switch operation has not been performed at all, or a switch operation for canceling the displayed alert has not been performed, timer counting is cleared before the timer counting is initiated again.

A digital single-lens reflex camera includes a lens unit and a camera body. The lens unit has a photographing lens and an identification data memory for storing identification data to identify the photographing lens. The camera body, to which the lens unit is detachably attached, has an imaging device which receives light transmitted through the photographing lens to generate an image corresponding to a subject, a lens data memory for storing lens data that indicates the shading characteristics of the photographing lens, a lens data reader that reads the lens data based on the identification data, and an image corrector that corrects an error in the image of the subject caused by shading, based on the lens data read by the lens data reader and imaging device data that indicates the shading characteristics of the imaging device.

The invention provides a device capable of recording a transmission electron image of a transmission electron microscope in real time in a mode of digital image. The device consists of a transmission electron phosphor screen, an optical lens, a digital single lens reflex camera, a computer and other auxiliary structures, and is characterized in that: the bottom part of a transmission electron microscope is provided with the transmission electron phosphor screen with a bigger area for converting the transmission electron image into the optical image; and the digital single lens reflex camera is arranged outside a projection room, the digital single lens reflex camera can convert the optical image into the digital image in real time by a wide-aperture value lens and send the image data to the computer, which is connected with the digital single lens reflex camera, by a usb 2.0 cable, the computer processes the image data so as to show the result in real time, and the exposure time and the light sensitivity of the digital single lens reflex camera are automatically controlled by software operated on the computer. The device can be used for replacing the electronic film of the transmission electron microscope to shoot the transmission electron images and the diffraction patterns.

At least one exemplary embodiment is directed to a digital single lens reflex camera which includes a motor on a side of a mirror box above a battery storage unit for a detachable battery, such that the motor's output shaft can be substantially perpendicular to the optical axis, which facilitates reduction of the size of the entire camera.

The invention relates to a focus detection optical system for digital single-lens reflex cameras or the like and an imaging apparatus incorporating the same. A pupil division optical system comprises an aperture stop having a pair of openings with an optical axis of said taking lens held between them, and a pair of re-imaging lenses, each consisting of a double-convex lens having a convex entrance-side surface and a convex exit-side surface. When, on a plane passing through the optical axis of the taking lens and the centers of gravity of the openings in the aperture stop, a surface apex is defined by a position of the convex entrance-side surface, and the convex exit-side surface, which position is extended most in a direction parallel with the optical axis of the taking lens, the surface apexes of the entrance-side surface and the exit-side surface of the double-convex lens are positioned away from the optical axis of the taking lens in the same direction, and the distance of the surface apex of the entrance-side surface from the optical axis of the taking lens is larger than the distance of the surface apex of the exit-side surface from the optical axis of the taking lens.