To see a list of SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More cameras, see the Category: SLR.

SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More is an acronym for Single Lens ReflexA Single Lens Reflex has a moveable mirror behind the lens, that reflects an image through a five-sided prism (pentaprism) or pair of mirrors, onto a glass screen (the viewfinder). This means the photographer sees exactly the same image that will be exposed. More. What does that stand for?

• Single Lens — The camera uses one lens for both taking and viewing. In other words you look through the same lens as the camera uses to expose the film or sensor (as opposed to twin-lens reflex cameras).
• Reflex — The term has the meaning of 'reflected'. Light passing through the lens is reflected upwards by the mirror, and focused onto a ground glass for previewing, as in a TLR ^[1].

When looking into the viewfinder of an SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More camera, you are looking through the taking lens, via a mirror that sits diagonally behind it blocking the light path to the film plane. Its reflected image explains the term reflex finder.

Function

When the shutter release of an SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More is tripped, the mirror you had been using to look through the lens swings out of the way. (In a few early SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More, it is finger pressure on the release plunger which moves the mirror.) This is the reason that the viewfinder always goes black in an SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More when you take a photograph. With the mirror out of the way, the film is now directly in line with the lens, but still shielded by a shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake. More mechanism. The shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake. More is now tripped, resulting in the film frame being exposed by the lens.

In most modern SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More, the aperture of the lens is held wide open when you are focusing and composing. This allows the brightest possible viewfinder image. In older cameras with 'manual stop down lenses' you would begin with the lens apertureThe aperture is basically a hole in the camera’s lens that lets light pass through it to the shutter and ultimately the film or censor. The aperture not only influences picture brightness but also regulates depth of focus. Most cameras are equipped with an iris aperture that can be freely adjusted or set according to pre-selected values. More to its widest setting while focusing and composing, and then manually change the apertureThe aperture is basically a hole in the camera’s lens that lets light pass through it to the shutter and ultimately the film or censor. The aperture not only influences picture brightness but also regulates depth of focus. Most cameras are equipped with an iris aperture that can be freely adjusted or set according to pre-selected values. More to your intended exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. More setting before releasing the shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake. More. In modern SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More, the apertureThe aperture is basically a hole in the camera’s lens that lets light pass through it to the shutter and ultimately the film or censor. The aperture not only influences picture brightness but also regulates depth of focus. Most cameras are equipped with an iris aperture that can be freely adjusted or set according to pre-selected values. More setting is stopped down automatically, in the instant before exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. More.

Once the exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. More is complete and the shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake. More is closed, the mirror (in most modern SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More), swings back into the taking position and you can once again see through the viewfinder. This is known as an 'instant-return mirror'. In older designs (especially those for medium format film). the mirror will stay in its 'up' position. The view finder will remain black until the photographer resets the mechanism by advancing the film.

In many vintage SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More (and few modern ones with interchangeable finders), the image on the ground glass is directly seen from above (waist-level finder) — it's upright, but reversed (left to right). In most modern SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More, the ground-glass image is seen through a prism or arrangement of mirrors atop of the ground glass screen. The view through the prism gives you an upright, unreversed viewfinder image (eye-level finder). The odd shape of this pentaprism gives the tops of 35mm SLRs their characteristic "hump" although different brands may use creative styling to conceal this.

An SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More combined with a digital sensor gives a digital SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More or DSLR.

Pros

• What you see is what you get, or almost. Looking through the same lens as will be used to expose the film means that you do not experience parallax errors like you might in a rangefinder or TLR camera. The only thing to be aware of is that, hidden somewhere in the fine print of your SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More specifications, will be a viewfinder percentage value. This tells you what percentage of the taking image you will see in the viewfinder. In most SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More this value is less than 100% indicating that slightly more of the scene than you see through the viewfinder will be exposed on the film. There are rare exceptions, like the original Nikon F and the current Olympus E-3, that do show 100% of the taking image -- but these are exceptions, rather than the rule.
• You always see the image of the taking lens and do not need any additional viewfinders for different focal lengths. This makes the use of unusual focal lengths straightforward. Wide-angle lenses and moderate telephoto lenses are available for rangefinderA rangefinder is a focus mechanism that allows the user to calculate the distance of a subject through the convergence of two images. Cameras that use this mechanism are usually referred to as ‘rangefinders’. Rangefinder cameras were very popular in the 1950s, 60s and 70s. Single Lens Reflex (SLRs) and compact cameras largely replaced them in the 70s, 80s and 90s. What is not always appreciated is that rangefinders offer several tangible benefits over SLRs, not least in image quality. Indeed, many photographers would rate the Leica M Digital Rangefinder as one of the best cameras available today.      More cameras, but may require accessory viewfinders; and focusing longer telephoto lenses correctly can be challenging.
• Because you look directly through the lens, more accurate focusing is possible. This is especially valuable in close-up and macro work.
• On many SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More, you can preview the depth of field prior to taking the shot, by stopping down the lens to its taking apertureThe aperture is basically a hole in the camera’s lens that lets light pass through it to the shutter and ultimately the film or censor. The aperture not only influences picture brightness but also regulates depth of focus. Most cameras are equipped with an iris aperture that can be freely adjusted or set according to pre-selected values. More. The viewfinder image becomes darker but you can see exactly what parts of the picture will be in focus and what will not.
• You can see the effect of any filters or auxiliary lenses fitted, and a TTL exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. More meter will automatically take any loss of light through these additions into account.

Cons

• The extra mechanisms for the mirror and prism add bulk and weight to a camera design. Camera designers are skilled at hiding this extra bulk but compare a Nikon F with a Leica of similar vintage to see the difference in size and weight.
• The mirror mechanism adds extra noise when you trip the shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake. More. Again, compare a Nikon F with a Leica of similar vintage to hear the difference. This extra noise can be a problem if you are in a quiet location or you are trying to be discreet.
• The mirror mechanism can add extra camera shake. The rapid movement of the mirror swinging out of the way can cause vibrations (an effect known as mirror slap) that add to camera shake when you are taking a picture. Camera designers try to remove this effect by cushioning the mirror's movement. With normal shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake. More speeds this effect is rarely a problem, but with longer exposures it can cause an image to slightly less sharp than it might otherwise be. Some fully featured SLRsA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More add a mirror lockup function to compensate for this effect. This function allows the photographer to manually select when to move the mirror out of the way in advance of taking the exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. More. This facility is prized by astro-, night- and some micro-photographers.
• The mirror motion before the shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake. More can open adds a slight shutter latency to SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More cameras i.e. when you trip the shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake. More in an SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More it takes a split second longer to expose the film with an SLRA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the film. Other camera typoes include DSLR, Rangefinder and Compact. More than it does with a rangefinder camera or TLR.
• Since the mirror flips out of the way to allow the film to be exposed, the viewfinder blacks out for the period of the exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. More (in fact from a little while before to a little while after). Although modern mirror mechanisms are very quick it does mean that you can never see the subject at the actual moment of exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. More. Photographers trying to capture fleeting facial expressions may find this frustrating.

Notes

Links

• the Monocular Duplex, one of the earliest SLR (by Calvin Rae Smith , patent 1884) on the Public Address