Molly Ayala
The electric eye in Konica Minolta refers to a feature in some of their film cameras, such as the AUTOREFLEX A, that enables automatic exposure. This system involves measuring light at the full opening of the lens through a selenium exposure meter, which then automatically selects the appropriate f-stop based on the available light. The electric eye system enhances photography by indicating the feasibility of taking pictures and helping photographers avoid under or overexposure.
| Characteristics | Values |
|---|---|
| Date of Launch | 1965 |
| Feature | Selenium exposure meter that automatically registers an appropriate f/stop based on available light |
| Manual Aperture Indicator Mark | "M" indicates non-alignment of the Electric Eye |
| Meter Needle | Aligns with the Index Point 39 when the lens is stopped down for the measurement of light |
| Warning Marks | Red mark visible on the top of the f-number scale is a warning for underexposure for an f/1.2 lens |
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What You'll Learn
Electric-eye system for automatic exposure
The "electric eye" feature, also known as the Electric-Eye system, in Konica Minolta cameras refers to automatic exposure capabilities. This system was introduced in the late 1950s and became common in entry-level cameras. The AUTOREFLEX A model is one such camera that uses the Electric-Eye system for automatic exposure.
The Electric-Eye system in the AUTOREFLEX A involves a selenium exposure meter that automatically registers the appropriate f-stop based on the available light. This ensures correct exposure for the film used in the camera. When the lens is stopped down for light measurement, the meter needle aligns with the Index Point 39, indicating the combination of shutter speed and lens aperture for proper exposure.
Additionally, the Electric-Eye system provides warning marks to prevent under-exposure and over-exposure. For instance, a red mark on the f-number scale indicates the potential for under-exposure for an f/1.2 lens. Conversely, a mark at the bottom of the f-number scale warns of over-exposure.
The Electric-Eye system allows photographers to take pictures while the camera automatically measures light at the full opening of the lens. This feature simplifies the process of capturing images with correct exposure settings, enhancing the overall photography experience.
Konica Minolta has also incorporated eye-controlled focus technology in some of their film cameras, further advancing the concept of "electric eye" capabilities beyond automatic exposure and into the realm of focusing.
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Electric-eye photography
The Konica Minolta AUTOREFLEX A is an example of a camera that uses the electric-eye system. It features a manual aperture indicator mark ("M"), which indicates the non-alignment of the electric eye of the aperture ring with the index mark for a fully automatic aperture (electric-eye) lens. When the camera is not used under the electric-eye system, the "M" is visible, indicating that the aperture of the lens can be manually operated.
The electric-eye system in the Konica Minolta AUTOREFLEX A also includes warning marks for underexposure and overexposure. If the meter needle is aligned with the underexposure warning mark, it indicates that the lens is not f/1.2 in brightness. If the needle is aligned with the overexposure warning mark, it indicates that the pictures will be overexposed.
In addition to the AUTOREFLEX A, Konica Minolta also offers other cameras with features such as red-eye reduction, eye-controlled focus, auto exposure, and a built-in light meter. These features enhance the photography experience by providing automatic settings, reducing red-eye in flash photography, and offering manual controls when desired.
Overall, electric-eye photography, as exemplified by the Konica Minolta AUTOREFLEX A, provides a convenient and efficient way to ensure correct exposure in photography by automatically adjusting settings based on available light conditions.
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Electric-eye system for aperture settings
The "electric eye" feature, also known as Electric-Eye Photography, in Konica Minolta cameras refers to the automatic exposure capability of the camera. This feature was first introduced in the late 1950s and has since become common in entry-level cameras.
The Electric-eye system for aperture settings in Konica Minolta AUTOREFLEX A cameras is a fully automatic aperture lens system. This system allows the camera to automatically adjust the aperture and shutter speed to ensure correct exposure for the film used. When the lens is stopped down during light measurement, the meter needle aligns with the Index Point 39, indicating the correct combination of shutter speed and lens aperture.
The Electric-Eye system also provides visual indicators to assist photographers in achieving proper exposure. For example, the manual aperture indicator mark "M" indicates that the aperture ring is not aligned with the index mark for a fully automatic aperture lens. Photographers are warned of potential underexposure or overexposure through the use of red marks on the f-number scale. By aligning the meter needle with specific marks, photographers can avoid underexposed or overexposed images.
The Electric-eye system in Konica Minolta cameras simplifies the process of achieving correct exposure by automatically adjusting settings and providing visual cues to photographers. This feature enhances the user experience by reducing the complexity of manual adjustments and helping to ensure optimally exposed photographs.
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Electric Drive
The Electric Drive feature is not explained in detail, but it is likely related to the camera's ability to be operated electronically, perhaps with a motorised function to facilitate the capturing of images. This feature is often found in more modern camera models, where the drive mechanism is powered by an electric motor, allowing for faster and more precise film advancement and shutter release.
Konica Minolta cameras with Electric Drive likely offer a seamless and efficient photographic experience, providing photographers with greater control over their images and improving their overall performance. This feature is particularly useful for photographers who require quick and responsive equipment, such as photojournalists or sports photographers, enabling them to capture fast-paced action and fleeting moments with precision.
The inclusion of Electric Drive in Konica Minolta film cameras demonstrates the company's commitment to innovation and technological advancement in the photography industry. By incorporating electronic features, Konica Minolta has enhanced the functionality and versatility of their cameras, appealing to a wide range of photographers, from amateurs to professionals, and enabling them to capture a diverse array of subjects and scenes with greater ease and accuracy.
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Eye-controlled focus
In the context of Konica Minolta, "electric eye" refers to a feature in some of their cameras that enables automatic exposure. This technology first appeared in entry-level cameras in the late 1950s, with models like the Brownie Starmatic and Revere Eye-Matic 127 offering this capability.
The AUTOREFLEX A is one such camera from Konica Minolta that features the electric eye system. This system allows for the measurement of light at the full opening of the lens, with the viewfinder providing information on aperture settings to ensure correct exposure for the film used. When the lens is stopped down for light measurement, the meter needle aligns with the Index Point 39, indicating the combination of shutter speed and lens aperture for proper exposure.
The electric eye system in the AUTOREFLEX A also includes warning marks to prevent under-exposure and over-exposure. For instance, a red mark on the f-number scale indicates the potential for under-exposure, while a mark at the bottom of the scale warns of over-exposure.
Konica Minolta also offers Eye-Controlled Focus cameras, which allow the photographer to select the focus area simply by looking at it through the viewfinder. This technology enhances the speed and precision of photography, particularly in dynamic situations where the subject or the photographer is in motion.
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Frequently asked questions
The electric eye system in Konica Minolta cameras refers to automatic exposure, where light is measured at the full opening of the lens.
When the lens is stopped down for light measurement, the meter needle aligns with the Index Point 39, indicating the correct combination of shutter speed and lens aperture for the film in the camera.
The alphabet "M" indicates that the camera is not being used under the electric eye system, and the aperture of the lens can be manually operated.
The AUTOREFLEX A is a Konica Minolta camera with the electric eye system. Starting in the late 1950s, other models with this feature included the Brownie Starmatic, Revere Eye-Matic 127, and AGFA Optima.
