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2006-08-04 09:37:55 · 10 answers · asked by d 1 in Consumer Electronics Cameras

10 answers

SLR stands for Single Lens Reflex.

The single-lens reflex (SLR) is a type of camera that uses a movable mirror placed between the lens and the film to project the image seen through the lens to a matte focusing screen. Most SLRs use a roof pentaprism or pentamirror to observe the image via an eyepiece, but there are also other finder arrangements, such as the waist-level finder or porro prisms.

The shutter in almost all contemporary SLRs sits just in front of the focal plane. If it does not, some other mechanism is required to ensure that no light reaches the film between exposures. For example, the Hasselblad 500C camera uses an auxiliary shutter blind in addition to its in-lens leaf shutter.

The cross-section (side-view) of the optical components of an SLR shows how the light passes through the lens assembly (1), is reflected by the mirror (2) and is projected on the matte focusing screen (5). Via a condensing lens (6) and internal reflections in the roof pentaprism (7) the image appears in the eyepiece (8). When an image is taken, the mirror moves in the direction of the arrow, the focal plane shutter (3) opens, and the image is projected in the film (4) in exactly the same manner as on the focusing screen.

This feature separates SLRs from other cameras, as the user sees the image as it would be captured. This aids in accurately knowing the image beforehand.

Since the technology became widespread in the 1970s, SLRs have become the main type of camera used by dedicated amateur photographers and professionals.

Digital SLRs

Canon, Nikon, Pentax and Minolta have developed digital SLR cameras compatible with their film SLR systems (though Konica-Minolta recently sold its SLR camera division to Sony who will continue manufacture), while Olympus has introduced a new digital-only SLR system, the Four Thirds system.

Advantages

Many of the advantages of SLR cameras derive from viewing the scene through the taking lens. The term Single Lens Reflex designates a type of camera which incorporates a viewing system where the subject is seen through the lens. This image is reflected on a mirror which passes through a prism that can be seen in the viewfinder. Cameras before SLR did not have this function, of course; subjects were seen through a viewfinder that was near the lens, making the photographer's view different from the lens' view. SLR cameras provided photographers with precision accuracy; they were seeing an image that would be exposed onto the negative exactly as it was seen through the lens. There is no parallax error, and exact focus can be confirmed by eye—otherwise hard for macro photography and when using telephoto lenses. The true depth of field may be seen by stopping down to the taking aperture, possible on all but the cheapest cameras. Because of the SLR's versatility, most manufacturers have a vast range of lenses and accessories available.

Compared to most fixed-lens compact cameras, the most commonly used and cheapest SLR lenses offer a wider aperture range and larger maximum aperture (typically f/1.4 to f/1.8 for a 50 mm lens). This allows photographs to be taken in lower light conditions without flash, and allows a narrower depth of field, which is useful for blurring the background behind the subject, making the subject more prominent. This is commonly used in portrait photography.

Oh also, you can't compare the quality of SLR camera with any other 35mm camera. OR a Digital SLR with any compact digital camera. Some people also say that you might be dissappointed buying SLR. The reason is that, specially in Digital SLR, it is a professional camera and you have to setup everything manually in order to get good quality pictures whereas in compact film or digital cameras, they are fully automatic and it could be possible that they are sharper but this sharpness is digital. Whereas with Digtial SLR, you have full control over the images, just download them to the computer and enhance them using tools such as Adobe Photoshop.

2006-08-04 09:42:46 · answer #1 · answered by Manish 5 · 0 0

As you don't know what an SLR camera is, then maybe you should not even consider purchasing one until you know a little more about cameras and photography first.
It would be best to start with a smaller digicam first...one with manual controls also, so you can get used to how a camera operates and which settings to use, before venturing out into the SLR path (which can be very costly and which only an experienced photographer should take)

2006-08-04 16:21:23 · answer #2 · answered by Petra_au 7 · 0 0

SLR stands for single lens reflex. SLRs were first developed as 35 mm film cameras, although there are SLR digital cameras now. The advantage of a single lens is what you see in the viewfinder is the exact image that will be transferred to the film. SLRs typically have removable lenses. You can get them with lots of fancy features, depending upon your budget.

2006-08-04 09:45:03 · answer #3 · answered by David S 5 · 0 0

SLR = single lens reflex. That means, when you look through the viewfinder at the back of the camera, a series of mirrors lets you see through the lens of the camera, so you get an accurate picture of what you are shooting at.
The other type is range finder. You look thru the view finder and are looking on a line parallel to the lens, with your line of sight, slightly above and to the left of the lens. The picture you get is slightly off from what you were looking at.
SLR cameras can have interchangeable lenses. In range finder cameras, the lens is permanently mounted to the body.
SLR's usually cost more and are more sophisticated than range finders.
You can start by shopping on EBay. Look to see what cameras are for sale, and look at the minimum bids. You can get an idea of what used cameras are worth.
There is really no lower limit and almost no upper limit on what you can spend for a camera and related equipment.

2006-08-04 09:51:25 · answer #4 · answered by regerugged 7 · 0 0

SLR stands for Single Lens Reflex..I'm sure a better camera weenie could tell you why.
Basically, they're the type of cameras where you can change lenses off the body.
I find that nowadays, there are largely two camps--CANON or NIKON. I really think it's personal preference. I like both, but I have a Nikon. Go to Ritz or your local camera shop and ask them to show you some models and let you play with them a little...pick whichever you like best.

2006-08-04 09:43:47 · answer #5 · answered by Woz 4 · 0 0

SLR = Single lens reflex

Choice depends on how much you wnat to pay, what features you want, quality...but film cameras are a bit obsolete now. I'll never go back to film.

2006-08-04 09:43:46 · answer #6 · answered by Anonymous · 0 0

Single Lens Reflex camera. Nikon is top of the line. Minolta is good, but out of business. Cannon, Konica, Fuji, Pentax, etc all good. Pick a brand that will have many accessories available, new & used.

2006-08-04 10:39:51 · answer #7 · answered by topcat_TEC 5 · 0 0

Single Lens Reflex means that you look through the peep hole and the image that you see is reflected from one mirror to the un-exposed film. you choose if you want have the camera do all the work for you(full electronic) or if you want to be-able to make your own adjustments (full Manuel) or some of each

2006-08-04 09:47:08 · answer #8 · answered by marblehound2001 3 · 0 0

Single Lens Reflex. One of the best film cameras made. The best used to be Cannon.

2006-08-04 09:44:13 · answer #9 · answered by Anonymous · 0 0

If you don't know what an SLR camera is, I can almost guarentee that you will be unhappy, if you buy one. Buy a fixed lens digital camera, instead.

2006-08-04 09:45:35 · answer #10 · answered by Anonymous · 0 0

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