SLR Cameras – What is a Single Lens Reflex?
If you want to understand how the SLR received it’s name, you have to dip into the history of the camera. Early cameras were similar to the view cameras used today. The photographer looked through the lens, focused, composed and then inserted a single film plate behind the optics to make an image. While the entire process was crude by modern standards, the photographer enjoyed great control, since he looked directly through the actual imaging lens to compose the shot.
While this was fine for still life, portraits and landscapes, this process did not lend itself to action photography. These early cameras could only record a single image at a time. Which is why you have never seen a motor-driven view camera.
Realizing the need to offer sequences of exposures, camera makers begin to experiment with various roll-film designs. With a roll of film in the camera, the photographer could fire off numerous images without reloading. Although this improved throughput dramatically, it caused another problem. The roll of film had to pass closely behind the camera’s optics, which meant that the photographer could no longer look through the camera lens to compose and focus.
Rangefinder cameras appear to keep things in focus
The lower-end, consumer roll-film cameras generally used an inexpensive “fixed-focus” lens, so a simple viewfinder was sufficient. Better quality optics, however, require the lens to be focused, and since the photographer could not look through the lens with a roll-film camera, this was a major problem. One of the first solutions to this problem was the Rangefinder — a type of camera that offered a distance measuring scale in the viewfinder. By determining the range from the viewfinder, the photographer could then adjust the focus to match — usually with very good results.
Twin Lens Reflex cameras offer another solution
While the rangefinder type cameras worked well, the camera industry is always evolving. A second method of allowing the photographer to focus and compose appeared in the “Twin-Lens Reflex” cameras. These cameras used two identical lenses, arranged one on top of the other in the manner of an over-and-under shotgun. The film winds past the lower lens, while the photographer can focus through the upper lens. The twin-lens cameras were fairly bulky, so designers added a mirror and ground glass to the top of the camera, hence the term “reflex.
Now the user could hold the camera at waist level and look down at the ground glass which previewed the image via the mirror located behind the upper lens. As the user adjusted the focus on the upper lens, a gear mechanism moved the lower “taking lens” to match.
While both rangefinders and twin-lens reflex cameras offered a credible way to focus and preview a shot, neither allowed the photographer to actually look through the actual lens. This sometimes made exact composition difficult.
SLRs take cameras another step forward
In their quest to allow users to see through the actual “taking” lens, camera makers turned to the periscope — a simple device using two mirrors placed at opposite angles to bend the light path. Periscopes are easy to understand — any kid can construct one from a couple of mirrors and some scrap wood.
In a camera, the lower mirror is placed at a 45 degree angle directly behind the lens. Light striking the mirror is projected upwards to a ground glass. While a second mirror would show the image on the ground glass to the user, it would not appear right, because mirrors tend to reverse things. So camera designers added a prism arrangement that corrects the reversed image. When you peer through the viewfinder on a SLR, you look through a prism, which displays the image on a ground glass, which displays the projected image from the mirror located behind the lens.
There is just one problem. If you have been paying attention, you have no-doubt realized that the lower mirror blocks the light path to the film (or digital sensor as the case may be.) Now the photographer can look though the lens, but the image cannot be projected on to the filmplane.
So the camera designers had to add another wrinkle. They had to move that mirror. Just long enough to make an exposure, since when the mirror moved, the photographer could no longer see anything through the lens. So they designed the “instant-return” mirror. At the instant of exposure, the mirror flies upward, the shutter fires and the mirror snaps back down. It is a incredible feat, when you consider that instant return mirrors have to flip up and back in a heartbeat, over and over for the life of the camera.
Once the instant return mirror was perfected, photographers could once again design their images by looking through the lens. Unlike the twin lens reflex, this new breed of camera needed only one lens to focus and shoot with. So they became known as… you guessed it…Single-Lens Reflex cameras.
By: Tom Bonner
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Digital Slr Cameras
The setup of the digital SLR camera is kind of difficult which would be best if you also learnt the ropes from a professional. The camera is filled with many functions which have to be set right in order to get the perfection when it comes to clarity and color.However in the long run you will end up understanding the functions and you will find out that the camera is easier to use than you thought. With the SLR you will look more professional when you are taking your photos and the clarity you get will speak for itself.
As a beginner it would be wise to leave the camera setting mode at automatic and as you grow you can advance to semi-manual and when you know you are good enough and you will know when you are good enough you can switch to full manual.
By: Peter Gitundu
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Peter Gitundu Researches And Reports On Digital Cameras. For more information on Digital SLR Cameras, Visit His Site At DIGITAL SLR CAMERAS
Take exclusive care to sustain the class of your digital camera
For the finest range of cameras, the amateur photographers are counseled to shop their digital SLR cameras from Camera hut. Thus to fulfill their digital SLR camera obligations, all people are now selecting for Camera hut. You can avail the best digital SLR camera deals at the CameraHut, at very profitable rates. Camera hut, most precisely imparts you a wide range of digital SLR cameras from all the decent brands such as Olympus, Leica, Sony, Nikon, Canon, Fujifilm, etc. At Camera hut, you can find the top selling digital cameras such as the Canon EOS 450D with 18mm-55mm IS Lens Kit, Canon EOS 40D with 18mm-55mm IS Lens Kit, Canon EOS 450D DSLR body, Canon EOS 1000D Digital SLR Camera Body, Canon EOS 1000D Digital SLR Camera with 18-55mm IS Lens Kit, Canon EOS 1Ds Mark II, Canon EOS-1D Mark III DSLR Body, Canon EOS-1Ds Mark III DSLR Body and the Canon EOS 400D Body (Black). Camera hut is comparison to the other online shops such as eBay is more dependable, affordable and reputed.
Once you have procured your favorite digital SLR camera, you should also carefully maintain it rightly. While using the digital SLR camera, you should favorably ban using its autofocus amenity. This attribute is generally used by the specialized photographers but as directed by the experts the employ should be shunned. It is advised to utilize only a single focusing point. This would help you when you are shooting close-ups. Thus, you can apply this autofocus trait while shooting any special event such as sports and other occasions. With your newly captivated digital SLR camera, you should also choose using the manual mode. However, most of the people mostly apply the automatic mode of the digital SLR camera to click their images so as to benefit better eminence images. But, using the manual mode of the digital SLR camera can aid you to edify the diverse fundamental functions of the camera.
Thus by using the camera in a manual mode you can become aware of all the traits and the functions of the digital SLR camera. Nevertheless, you just have to read the booklet with the instructions before operating your camera. When you are procuring portraits, you should forbidden using the direct flash on the object, if you wish to have good photos from your digital SLR camera.
By: Jessica Thomson
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For more insights and further information about Digital Camerasvisit our site http://www.camerahut.com.au/
Nikon D200 Digital Slr Camera
Design
The size of Nikon D200 camera is midsize. The dimensions are 147 by 113 by 74mm. The weight of Nikon D200 camera is 830g. With a built-in vertical grip, Nikon D200 camera is very comfortable to hold while shooting. It has a rugged feel to it, with dust sealed magnesium-alloy body.
Controls
Nikon has kept the controls of Nikon D200 Digital SLR Camera very simple. Thus you can quickly master them. Near the LCD screen there are a number of buttons for various functions such as picture review, the menu system, review layout options and image protection. On the right side of the LCD screen there is a knob which helps you from preventing you from accidentally changing the auto focus zone.
Key features
Nikon D200 Digital SLR Camera boasts of a 10.2 mega pixel sensor resolution. Its LCD screen is 2.5 inch wide. It saves the images on Compact Flash and Micro drive media. It has 45 different custom settings. The excellent thing about this camera is that it can even lock its subjects even in low light. Now that is Excellence at par! Nikon D200 camera also has an aperture coupling ring. This coupling ring allows auto exposure functions in manual exposure metering.
Performance
Performance wise, it is the best. It can shoot up to 5 frames per second. Its shutter speed is 30 seconds to 1/8,000-second. The images clicked are best by every standard. Smooth, warm and bright colors are seen. The clarity of images is wonderful.
Conclusion
Nikon D200 Digital SLR Camera is perfect for professionals as well as amateurs.
By: Pooja Lapasia
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Pooja Lapasia is has a good name as an author; her articles cover many topics including digital slr cameras, latest mobile phones, online shopping and digital cameras.
Buying a Digital Slr Camera? Follow These Tips!
Many people ask: What does megapixel mean? What exactly is a digital SLR camera? Why should I choose an SLR camera over a basic digital camera? How do the different digital SLR models compare?
Before you purchase a digital SLR camera, you should understand the definition of megapixel and what it means to you. The megapixel of a digital camera is the resolution of the camera, or more specifically it is the number of pixels of light within a given space. If a digital camera has higher megapixels that means that the image will be clearer and sharper.
Although higher megapixels mean sharper images, you need to be cautious and not overdo the pixel count. Too many pixels may cause your photos to appear unnatural. As you read camera reviews and select that camera that you are going to purchase, look at the options that you have and find a good balance of price and pixel amounts.
One of the biggest questions new photographers have is “What does SLR mean?” SLR stands for “single lens reflex” which means that it is a camera that uses a mirror between the film and the lens. That mirror projects the image through the lens onto a focusing screen. All of the highest end cameras today are digital SLR cameras.
So, what is the advantage of purchasing a digital SLR camera instead of a more basic camera? Digital SLR cameras have many new features including: the ability to change the lenses, higher megapixels, ISO settings, and many more.
Now that you can see the advantages of purchasing a digital SLR camera, how do you decide on which model you should choose? Decide which features you would like to have on your new camera, then read reviews and compare camera models that include the features you are looking for. If you follow these easy guidelines you will soon have your dream camera in your hands!
By: Jayda Kaycee
About the Author:
About the Author: Jayda Kaycee is an expert in finding the ideal digital SLR camera. Find the best SLR discounts on the web and get digital camera reviews at www.discountdigitalslr.com..
Uphold quality of your digital camera
For the preeminent range of cameras, the part-time photographers are directed to shop their digital SLR cameras from Camera hut. Many people are opting for the CameraHut, these days for their digital SLR camera necessities. You can gain the best digital SLR camera deals at the CameraHut, at very reasonable rates. CameraHut gives the most digital SLR cameras of the most reputable brands such as Canon, Nikon, Sony, Pentax, Olympus, Leica and Fujifilm. At Camera hut, you can find the best selling digital cameras such as the Canon EOS 450D with 18mm-55mm IS Lens Kit, Canon EOS 40D with 18mm-55mm IS Lens Kit, Canon EOS 450D DSLR body, Canon EOS 1000D Digital SLR Camera Body, Canon EOS 1000D Digital SLR Camera with 18-55mm IS Lens Kit, Canon EOS 1Ds Mark II, Canon EOS-1D Mark III DSLR Body, Canon EOS-1Ds Mark III DSLR Body and the Canon EOS 400D Body (Black). As compared to other online shops like the eBay, the CameraHut is more decent and affordable.
However, after procuring your favorite digital SLR camera from the CameraHut, you must uphold it appropriately. You should prohibited using the auto focus amenity of the digital SLR camera. This trait is typically used by the proficient photographers but as counseled by the experts the apply should be shunned. It is counseled to employ only a single focusing point. This helps you to shoot the close ups very greatly. You can use the auto focus attribute when you are shooting for any sports event. You should also prefer the manual mode of the digital SLR camera, which you have captured. Many people mostly utilize the automatic mode, in order to gain good photos. However, using the manual mode would make you edify the crucial functions of the digital SLR camera.
Thus by using the camera in a manual mode you can become aware of all the attributes and the functions of the digital SLR camera. Nevertheless, you just have to read the booklet with the instructions before operating your camera. However, while taking the portraits of people, you should choose forbidden using the direct flash of the camera on the object which thus aids you to achieve good eminence images from your digital SLR camera.
By: Jessica Thomson
About the Author:
For more insights and further information about Digital Camerasvisit our site http://www.camerahut.com.au/
Digital Slr Cameras– Single Lens Reflex; Who Should Use Them?
Things get slightly more complicated as you ho further in depth into photography, but don’t let that stop you.
If you’re interested in photography at all and are considering taking it up seriously as a hobby or a profession, then I would suggest that you shop around and find the right digital SLR cameras for you.
Start as you mean to go on and you should be fine. Admittedly you might be stuck on the auto meter button for a while, but you will eventually get over that problem and will find yourself using the many functions offered to you by the digital SLR cameras, with ease.
By: Muna wa Wanjiru
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Muna wa Wanjiru is a Web Administrator and has been Researching and Reporting on Digital Photography for years. For more information on Digital SLR Cameras, visit his site at DIGITAL SLR CAMERAS
The Journey From Old-fashioned Film to Digital Slr Technology
Getting started with a brand new camera is not what it used to be, today’s digital cameras are very user-friendly and affordable. One benefit of using a digital camera over an old film camera is that you can take unlimited photos at no extra cost because you do not need to purchase film.
In addition, digital cameras have a built-in LCD screen so that you can instantly view your photos without printing the images. This LCD screen allows the photographer to frame the pictures more precisely. An LCD screen also gives the photographer the capability of re-taking the picture if it didn’t turn out like they expected. If the picture doesn’t turn out as good as you wanted, you can always delete it and try again!
Digital cameras today come in all different shapes and sizes. There are great benefits that can be found in some of the simple cameras as well as the high-tech digital SLR cameras. There are many benefits to using a higher end digital SLR camera including:
1. Digital SLR cameras allow a photographer to choose from dozens of high end features such as ISO settings, aperture priority, and shake-reduction. On the other hand, if you don’t want to fuss with the extra features you also have the option to set it on automatic and let the camera do the work for you.
2. Digital SLR cameras broaden your horizon by allowing a photographer to change lenses. Switching out lenses enables a photographer to take many different kinds of photographs with just one camera. A high quality lens allows you to shoot in many different conditions with much brighter and sharper images.
3. A photographer who uses a digital SLR camera also gains the respect of others around. People see the nice equipment and automatically assume that you are experienced in your field. The great thing about it is that you can get nice equipment without going bankrupt because it is so affordable!
Although you have many camera options out there, you should definitely choose a digital camera over a film camera. Because digital cameras are so affordable, there is no question about what kind of digital camera you should buy– digital SLR cameras are the way to go.
By: Jayda Kaycee
About the Author:
About the Author: Jayda Kaycee is an expert in finding the ideal digital SLR camera. Find the best SLR discounts on the web and get digital camera reviews at www.discountdigitalslr.com..
Digital SLR Cameras are more appropriate For camera lover and expert Than the Regular cameraperson
Sky-scraping price
In spite of this, you need to spend a lot money for purchasing these digital SLR camera since their initial cost start from 5000 $, this can be pretty unreasonable for the standard customer. Simply specialist can actually manage to pay for them; however Canon and also Nikon have introduced some economical digital SLR camera with estimate stretch of 1000 dollars that too with no extra lenses.
Whatsoever is the expense, digital SLR camera benefit photographers to approach with a better-quality and ultimate output with superiority, greatly developed than you usually expect from various other digital cameras, and talking about the precise quality of SLR’s, you have an guaranteed outshine shade and contrast also. Observing Digital SLR Camera – The best Digital SLR camera reviews¸ you can get to know that they are extremely adaptable and they offer you with oodles of suppleness that is reproduced in the sharp characteristic photograph. You be capable of selecting from a various great trade name and wide range of varieties that are put forward by various reputed product makers including features such as cameras that appear with extensive perspective and telephoto descriptions also.
Although you may be excite to acquire you a digital SLR camera, you have to initially come to a decision about the use of digital SLR camera since it is not very essential to possess one if you desire to capture portrayal, or click snap at marriage ceremony and etc due its high cost. As a matter of fact, Digital SLR Camera is more appropriate for camera lover and expert Than the Regular cameraperson
If you opt to go for digital SLR camera, you must to then follow a line of investigation of a variety of SLR cameras to come across that is ready to go your financial plan and requirements, and going through magazine is a constructive technique to carve list of preference. You have to be clear in your mind of the concept that no matter what model you opt or you prefer, your digital SLR camera will give you superior competence in captivating photograph, and more style at the final stage of product.
But don’t forget that this investment would be worthwhile as you see the final product in the end and you would be proud of it!
By: DigitalCameras
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Digital SLR Camera – The best Digital SLR Camera review will create faith of course, where you can get the best quality product matching your budget
Unraveling the spectrum of digital cameras
Camerahut is highly reliable and reputed destination to find all types of cameras manufactured by the finest brands of the world like Nicon, Chino, Canon, Sony, Casio, Olympus, Pentex and many other leading brands to add on. The offer the widest range of automatic, auto focus, digital cameras, digital SLR cameras, still cameras, all types of video and movie cameras. They are the approved and authorized distributors of many top branded manufacturers and they buy directly from them in a huge quantity to cater every need of their large clientele within and across the country. Their aim is to offer the best photographic products at the most affordable rates. They guarantee the lowest possible prices in the country. They run a special promotion to offer the best digital SLR cameras like Canon digital SLR and Canon EOS at introductory prices.
By: Jessica Thomson
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For more insights and further information about Canon EOS 1Ds visit our site http://www.camerahut.com.au/canon-mark-p-22.html
Understanding What the Anti Dust Feature is in Digital Slr Cameras
The CCD sensor is located behind the reflex mirror in a digital SLR camera. When taking a photo the mirror moves and lets the light coming through the lenses hit the CCD which then converts the light to a series of pixels comprising the digital photo. Most of the time the camera is closed and dust can not penetrate it. Some cameras might not be completely sealed against dust resulting in dust penetrating he camera’s body even with the lenses installed. However in most cases the majority of dust exposure is when lenses are replaced. During that time the camera is open and exposed to air and dust.
In order to minimize dust on the CCD make sure that you minimize the time in which the camera is open and exposed to air. For example when changing lenses make sure that you are in a relatively clean environment and that you have the second lenses handy. Try to avoid changing lenses when in windy or dusty environment. Never take the lenses off a camera and leave the body open and exposed – either install other lenses or put a seal on the body to prevent dust ***********.
Even with careful care dust will eventually find its way into the camera and on the CCD. There are a few ways to get rid of that dust. Depending on your camera some of them will not be available to you.
Active dust removal: Most new SLR cameras include some sort of active dust removal mechanism. The most common one is anti dust vibration. This solution removes dust from the sensor by vibrating it in high frequency for a short period of time. Vibrating the CCD will result in dust falling off the CCD or “dancing its way” from the CCD. Different cameras turn the anti dust vibration at different times. Some cameras turn it on every time the camera is switched on, some every time it is switched off and some both when the camera is switched on and when it is switched off. Other cameras turn the vibration on periodically or let the user turn it manually.
Cameras that include an image stabilizer based on sensor movement usually also include anti dust vibration since they already include the mechanical part: a motor that can move the sensor and thus the anti dust vibration is a simply software addition.
Passive dust prevention: Passive solution that tries to eliminate some of the causes for dust accumulating on the CCD. The main reason that draws dust to the CCD is static charge. Some manufacturers add an anti-static coating on the outer layer of the CCD (usually this is the low pass filter layer). By doing that the CCD is less likely to attract dust due to its static charge.
Manual dust removal: Manual removal is simply a way for you to manually clean the CCD. When put in manual dust removal mode the camera moves the mirror and keeps it in a position where the CCD is exposed and is reachable. At that time you can try to blow off dust from the CCD for example by using an air blower. You could also use special cloth in order to clean the CCD but be very careful when doing that and make sure you read the manufacturers instructions for how to clean the CCD without damaging it. If you’re not sure how to clean the CCD it is better not to attempt cleaning as it can be easily damaged.
All dust removal methods have their limitations. Adhesive dust or other material is either very hard to clean or impossible to clean. Eliminating dust completely from the CCD is impossible but by applying care and the mentioned features most of the dust that results in photo imperfections can be avoided. For the casual photographer the built-in active or passive anti dust features should be enough and manual cleaning will not be needed.
By: Or Hillel
About the Author:
This article can be published and used as long as the resource box including the backlink is included. You can find more information on digital photo printing printing and photography in general on printrates.com – a site dedicated to photo printing Ziv Haparnas is a technology expoert. Mr. Haparnas writes about practical technology and science issues.










