JP2009276464A - Lens barrel with simple sight mounted thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple and inexpensive lens barrel with a simple sight mounted thereon allowing the direction of a lens to be set with a posture for viewing a finder of a camera. <P>SOLUTION: In a telephoto interchangeable lens of a system camera which is mounted on a camera and can check subject composition, the sight allows the subject to be seen without through the lens, and is the simple device in which telescopic view is obtained via a through-hole installed at a suspension handle of the telephoto interchangeable lens. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

In addition to a finder image of a camera equipped with a telephoto lens, the present invention relates to a sighting device equipped with a lens barrel that allows a subject target to be visually recognized with a single lens barrel.

  Interchangeable lenses in system cameras such as single-lens reflex cameras are increasingly expanding the shooting range and increasing their possibilities. In particular, in telephoto lenses, further long-focus lenses have been developed, and it has become possible to photograph distant subject images.

  However, when looking through the camera finder, it was necessary to search by shaking the lens to match a distant subject with the target captured with the naked eye. there were. For example, when looking into a wild bird or the like with a super telephoto lens, it is very difficult to see the target wild bird at an instant, and it was necessary to swing around the lens up and down and left and right to search for the target bird.

In view of such problems, a telephoto imaging apparatus with a sighting device as disclosed in Patent Document 1 has been proposed and is characterized in that rapid aiming is possible by sharing with a camera finder, but the apparatus is large-scale. It is regarded as a problem that it is expensive.
JP-A-8-98073

  The telephoto lens is equipped with a device that allows the telephoto lens to aim the target in the approximate target direction before looking into the camera's viewfinder. An inexpensive lens barrel with a simple sighting device is provided.

With the telephoto lens attached to the camera, it is possible to catch the target at an approximate position by aiming with the naked eye in the direction of the subject to be photographed. Just look into the viewfinder at the shooting stage and correct the intended composition. Shooting can be performed quickly and accurately.

  A through hole that is almost parallel to the optical axis is formed in a handle that can be suspended with the tripod mount of the telephoto lens facing down, and the target can be seen with the naked eye through the through hole in the viewfinder looking posture when the camera is mounted. A simple sight configuration was used to solve the problem.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a large telephoto lens equipped with the simplified sighting device of the present invention, FIG. 2 is a side view of a lens barrel showing the operation of the sighting device, and FIG. 3 is a front view from the lens rear photographing position. It is. In the drawings, the same members are denoted by the same reference numerals.

FIG. 1 shows a lens barrel 1 embodying the present invention. The lens barrel 1 is provided with a simple sight 2 and a rear barrel 4, and a strap suspension fitting 3 is fixedly provided. Further, a camera body 6 is attached to the rear barrel 4. Through holes 2 a are formed at both ends of the simple sight 2 so as to be parallel to the optical axis l. Since the simplified sighting device 2 is integrated with the handle, it also has a function as a handle used when the lens barrel 1 is transported.

The lens barrel 1 is provided with a plurality of lens groups (not shown). Among the plurality of lens groups, a zooming lens group (not shown) used for a zooming operation and a focusing operation are provided. A focusing lens group (not shown) to be used is disposed. A command for moving the lens frame (not shown) of the zooming lens group and the lens frame (not shown) of the focusing lens group is given by the photographer. As means for sending out the movement command, a zooming command is obtained by rotating the zooming operation ring 4a, and a focusing command is obtained by rotating the focusing operation ring 4b.

The zooming operation ring 4a and the focusing operation ring 4b are installed in the rear lens barrel 4 connected to the rear part of the fixed cylinder 8, and can be rotated left and right, and there is no stop position of the rotation operation. It has become. The zooming operation ring 4a and the focusing operation ring 4b are juxtaposed at positions close to the camera body 6 to be mounted on the end of the rear barrel 4. A tripod seat 5 is provided at the lower part of the lens barrel 1, and when taking a picture with the tripod fixed to the tripod base 5, zooming operation and focusing in a posture in which the photographer looks into the viewfinder 6a of the camera body 6 is performed. Easy to operate.

FIG. 2 shows a state in which the lens barrel 1 is aimed at the subject. By looking at the subject from the through-hole 2a of the simple sighting device 2 disposed in the lens barrel 1, the aim can be adjusted to the subject. The photographing posture is taken so that the line of sight 7 to the subject through the through hole 2a of the photographer is parallel to the optical axis l, and the through hole 2a is looked into.

By looking through the through-hole 2a drilled in the simple sighting device 2, the subject can be caught by eye measurement and a rough composition can be determined. Thereafter, the subject can be visually recognized from the viewfinder 6a, the zooming operation ring 4a is used for the zooming operation, and the focusing operation ring 4b is used for the focusing operation, whereby the composition can be finely adjusted quickly and accurately.

As shown in FIG. 3, the lens barrel 1 is fixedly provided with a strap suspension fitting 3, a simple sighting device 2 is provided, a camera body 6 is mounted, and the simple sighting device 2 is perforated. It can be seen that the through hole 2a is formed parallel to the optical axis l. Since the through hole 2a is disposed on the lens barrel 1 so as to be on the same Y axis as the viewfinder 6a and the monitor 6b, the photographer can view his / her line of sight between the through hole 2a and the viewfinder 6a or the monitor 6b. When moving, the photographer does not need to change the shooting posture greatly. As a result, a series of operations from capturing the subject to photographing can be performed quickly and accurately.

It is a perspective view of a large telephoto lens equipped with the simplified sighting device of the present invention. It is a side view of the lens barrel showing the operation of the sighting device. It is a front view from a lens back photographing position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens barrel 2 Simplified sight 2a Through hole 3 Suspension bracket 4 Rear barrel 4a Zooming operation ring 4b Focusing operation ring 5 Tripod seat 6 Camera body 6a Finder 6b Monitor 7 Line of sight 8 Fixed cylinder l Optical axis

Claims (2)

A lens barrel characterized in that a telescope interchangeable lens of a system camera that can be attached to a camera and confirm a subject composition is equipped with an sight that can capture the subject without passing through the lens.   2. The lens barrel according to claim 1, wherein the sighting device is a simple device that looks through a through hole provided in a suspension handle of the telephoto interchangeable lens.

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