What is a DSLR?
First of all, what does DSLR stand for?
DSLR is the abbreviation for Digital Single Lens Reflex.
Digital means that the camera operates with a fixed, digital sensor.
Single-lens means the camera uses the same lens for framing, focusing, and taking the photograph. This is different from rangefinder and twin-lens-reflex constructions. With those types, you can’t see the exact view from the lens that will take the shot. Instead, you need to rely on other methods for setting up the shot.
Reflex refers to a system where a mirror splits or directs the incoming light towards the optical viewfinder. It allows you to see an exact, optical view of the scene. This mirror can be fixed and semi-transparent (in SLT-type cameras). Or, it can flip up during exposure (in SLRs and DSLR).
So what is the difference between a DSLR and SLR camera? Mainly that the former has a digital sensor to record its images. An SLR uses film.
How does a DSLR woks?.
A DSLR system consists of two main elements: the lens and the camera body. These can be interchanged to an extent. Professionals have many lenses and often more than one camera.
Understanding their basic concept is not rocket science. It is explained best by showing the way of light:
First, light hits the lens from the front. Then, it travels through the lens, which shapes it to a form the photographer desires. It then makes its way through the lens mount to the camera.
Then it encounters the main mirror. The mirror reflects most of it upwards, to the viewfinder. There, a pentaprism or a pentamirror directs it to the viewer’s eye. This allows you to see exactly what the lens sees.
In SLRs and DSLRs with autofocus, a small portion of the incoming light actually passes through the main mirror. There, it hits the secondary mirror. This directs it down to the autofocusing sensor.
In this state, none of the light hits the imaging sensor. This is a key trait of DSLRs.
When you press the shutter button to take a photo, the mirrors flip up. This enables light to hit the sensor. Because the main mirror no longer reflects anything, there is a blackout in the viewfinder.
The shutter mechanism, right in front of the sensor, opens up. It exposes the image and closes down after a set amount of time. That time is called the shutter speed.
After the exposure, the moving parts go back to their previous state.First, light hits the lens from the front. Then, it travels through the lens, which shapes it to a form the photographer desires. It then makes its way through the lens mount to the camera.
Then it encounters the main mirror. The mirror reflects most of it upwards, to the viewfinder. There, a pentaprism or a pentamirror directs it to the viewer’s eye. This allows you to see exactly what the lens sees.
In SLRs and DSLRs with autofocus, a small portion of the incoming light actually passes through the main mirror. There, it hits the secondary mirror. This directs it down to the autofocusing sensor.
In this state, none of the light hits the imaging sensor. This is a key trait of DSLRs.
When you press the shutter button to take a photo, the mirrors flip up. This enables light to hit the sensor. Because the main mirror no longer reflects anything, there is a blackout in the viewfinder.
The shutter mechanism, right in front of the sensor, opens up. It exposes the image and closes down after a set amount of time. That time is called the shutter speed.
After the exposure, the moving parts go back to their previous state..
Why do we need a DSLR?
You might wonder,’what is the purpose of DSLR camera’?
First it is a really well-tested and tried construction. SCR’s have been around for a century and most of the people associate them with the wod ‘CAMERA‘.
A Technical advantage of modern STR is that they porvide a direct ,optical view from the lens. so, latency or low light noise in the viewfinder is not an issue, this is not the case with some mior less,bridge & compact Cameras.
DSLR have larger body compare to other cameras like Mirrorless and Bridge cameras.
Because of their bigger size it provides space for more buttons. Which helps to controll easily and fastly precise manual control.
You can find DSLR’s ranging from entry level devices to high quality medium format models. These can easily cost a 5 digit sum.
The main advantage of DSLR is it is intechangable you can mount (or) attach the top (or) professional lenses to a basic body. Which provides you a better image quality.
There are two most popular DSLR’s (cannon EF & Nikon F)have over a thousands of lenses are available. There are third party lenses are also available for example Sigma & Tamaron
What Are the Disadvantages of DSLR Cameras👎👎?
DSLR’s also have some drawbacks.
First, they are bulky, especially professional DSLR’s. The rotating mirrors, the autofocusing sensor, and the complex viewfinder take up a lot of space.
The optical viewfinder also introduces problems. Its display options are very limited. For instance, you cannot see the current exposure. You can’t judge if your shot will be properly exposed just by looking at an image in the optical viewfinder.
The separate autofocusing sensor can cause headaches, too. If the sensor and the image sensor are misaligned, autofocus won’t work accurately. It might catch focus in front of or behind the subject you aim for.
Lastly, most of the DSLRs use mechanical shutter which means that they are rated for a certain exposure number before failing permanently.
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