CN85201927U - Multi-purpose trick photography device for both 135 and 120 cameras - Google Patents

Abstract

The utility model relates to a further development of the trick photographing in the daily photographing field. The utility model can be used for the 120 camera and the 135 camera to conduct trick photographing. The key point is solving the double photographing problem of the 135 camera. The purpose can be obtained by only providing a light proofing cover whose structure is simple and combining with the original mechanism of the camera. A solving art is provided for solving the phenomenon that the edge color film of the original color filtering lens is a little thicker. The art is that the periphery of one surface of the lens is grinded off a corner to prevent the color film liquid from depositing on the periphery area.

Description

Multi-purpose trick photography device for both 135 and 120 cameras

The utility model device is to conceive on original 120 stunt cover bases, and enlarging usable range is a kind of new invention that is occurred under the prerequisite in the problem that solution 135 cameras are retaken particularly.

Because 135 colour phhotograpies are day by day deeply popularized, special effect cinematography is thereupon also extremely paid attention to, and an essential condition of special effect cinematography is the device that repetition sensitization must camera can be arranged.But 135 cameras generally do not possess, and it uses and can achieve a solution in conjunction with the method for this device.

The main effect and the effect of this device are: the device of making a kind of 135,120 camera dual-purpose multifunctionals, shared a slice yellow filter, rewinding device in conjunction with 135 cameras, be aided with the black out lid, can play the effect (that is: 135 colored special effect cinematographies, shading, black-and-white film stunt, shading, colour filter and 120 stunt, shading, the colour filters of taking a picture) of eight functions.

This device designs as follows

A, when being used for 120 camera shootings, its daylight opening is horn-like, when being used for 135 cameras, its daylight opening is reducing, does not influence shooting, the feasibility of this is to certify that under the less adverse condition of lens focus.

Known: small end bore 36mm

Egative film diagonal angle line length= $\sqrt{{\mathrm{36}}^2\mathrm{+24}{}^2}$ ＝43.3mm

When lens focus 35mm(visual angle is big)

The height h that this photography cover should be got

Visual angle a=2arctg 43.3/2.35

a＝63.50°

arctg 18/(h) ＝ (a)/2 h＝29mm

Having only when photography cover osculum diametric plane during less than 29mm, does not just influence shooting effect from the camera lens distance, can be used for the visual angle when this device is got h=20mm greatly to the cameras shootings that are bordering on 65 degree.

B, in view of above-mentioned analysis, this device chooses certain range of size, the special effect cinematography that is used for 135,120 cameras possesses adequate condition and feasibility.

When C, color filter colouring film, because existing technology exists the edge blocked up, the phenomenon that colourity is dark, its reason be centrifugal force make its colorant move to lens edge and the surface tension at edge greater than centrifugal force, the way that solves is by means of action of gravity, promptly in eyeglass one edge, grind off certain angle in advance, colored paint can't be accumulated in the surrounding zone.

D, the method for exposure repeatedly: egative film behind the exposure, will push up on the rewind button for the first time, lift the rotor turn-knob put in place (egative film can not move) can carry out the exposure second time, can carry out exposure repeatedly similarly.In the time will taking next photo, withstand rewind button with hand, wouldn't make its playback, the another hand lifts the rotor turn-knob, when turn-knob will put in place, withstanding the openhanded of reviewing knob opens, button ejects and playbacks at this moment, lives photography with the black out cap seal and covers light inlet, presses shutter (film is sensitization not), mobile again rotor turn-knob just can carry out the shooting of a new photo then.

Be further described below in conjunction with accompanying drawing:

Housing (1): its height when being used for 135 cameras, removes big inner cover (6), big outer cover (7) less than 20mm, and the big end of housing (1) is installed on the camera.

Color filter (2): be fixed on the liner (3), it is contained in path one end of housing (1), and when being used for 120 cameras, the left end of liner (3) directly is contained on the camera, and need not the little outer cover of little inner cover (4) (5).

Little inner cover (4), little outer cover (5): in being respectively empty 3/4ths and 1/2nd every honest and clean, effect is the sense of control light area, big inner cover (6), big outer cover (7) and little inner cover (4), little outer cover (5) are identical respectively, and its diameter than little inner cover (4), little outer cover (5) greatly.

Black out lid (8): be auxiliary component when retaking,, must press shutter earlier, enter for preventing light, so use this part because before rotor as 135 special effect cinematographies.

The connection of each part is based on housing (1), the liner (3) that has color filter (2) places in the small-bore end of housing (1), and little inner cover (4) is enclosed within housing (1) the small end external diameter, little outer cover (5) is enclosed within on the little inner cover (4), and the big end of housing (1) then is enclosed within on 135 cameras.Be used for 120 camera methods of attachment as previously mentioned, only load onto big inner cover (6), big outer cover (7) at heavy caliber one end of housing (1).

This device is except that eyeglass, and each parts is macromolecular material (can select plastics), thus can moulding film-making on injection machine, mould with reference to the accompanying drawings shown in design, lens materials is used quality optical glass preferably, also draws system according to institute's sizing.

Claims (4)

1, a kind ofly can be used for the device that 135,120 cameras carry out special effect cinematography, it mainly is made up of housing (1), yellow filter (2), black out lid (8) etc., it is characterized in that housing two ends bore does not wait, be convenient to be installed on two types the camera, and need only the uniform yellow filter of a slice film forming and the cooperation black out lid of operation of retaking.

2, device according to claim 1 is characterized in that housing (1) by the macromolecular material making, and heavy caliber one end also can be installed certain thickness outer ring or inner ring so that be suitable for 135 cameras of multiple bore.

3, device according to claim 1 is characterized in that grinding off in advance on the periphery of color filter (2) one side one and is angle less than 45 degree with its minute surface, so that the look film thickness unanimity of cloth on whole minute surface.

4, according to claim 1, it is characterized in that black out lid (8) makes of lighttight plastic material, inwall smooth with combine compactness every honest and clean (5) outer wall.

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