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Anatomy of a camera & Shutter speed/aperture/depth of field - 20/9/17

Anatomy of a DSLR

In today’s blog, I am going to be talking about the anatomy of a DSLR.

For starters, if anyone does not know what DSLR stands for? It stands for Digital Single Lens Reflex.

If you are new to photography this blog will allow you to understand the aspects of a camera, because you probably look at a camera & think, “oh it just takes photos/digital images”. But in reality, there is so much to a camera than meets the eye.
Aspects such as:

. Depth of field
. Shutter seed
. Aperture
. Auto exposure
& Many more, & in this blog I am going to be talking about some of them aspects.

You are probably wondering, how does an camera actually capture an image, well here how; if you remove the lens of your camera, & look inside the body of your camera, you will find that you will see a mirror which is what the light which is exposed through or travels through your lens hits which of course is also triggered by the shutter of your camera. The reaction of the light that hits the mirror will trigger the sensor plate that is behind your cameras shutter, which of course is connected to your LED screen, which allows you to see your captured image. The light rays then bounce off the first mirror, which then hits other mirrors which then allows you to see your image through your viewfinder.


Aperture

For those who are wondering what aperture actually is, its what, light from the photo in which you are trying to take, passes through to therefore to create a focus in the image plane. You can find it in the lens of your camera, the hole being the lens of the camera, so when you twist the lens to zoom, you are therefore adjusting the aperture.
Aperture also comes in many sizes, if you want to get technical; the specifications for a given lens typically include minimum & maximum aperture sizes. For example, f/1.4 to f/22. In this case for example, f/1.4 being the maximum aperture & f/22 being the minimum aperture. Depending on if the aperture opening being wider sizes up from f/1.4 they are also known as fast lenses.
F/ is also known as f-stop.

Depth of field

In optics, particularly as it relates to film & photography, Depth of field is known as the distance between the nearest & farthest objects in a scene that appear sharp in a image. Although a lens can precisely only focus on one distance at a time, when depth of field is applied the decrease of sharpness on each side is gradual of the focus distance, so meaning that when you are closer or should I say the more you focus on one particular subject the background will become less sharp & more out of focus.

On a traditional DSLR, you will find a DOF, preview button, this button allows you the scene in which you are trying to capture, will be kept in focus with the aperture you’ve chosen. So all in all, aperture & DOF come hand in hand pretty well.

Large apertures create a shallow depth of field & small apertures give a wide depth of field.

Shutter speed

When it comes to photography, like a few of the other aspects shutter speed is very important for when it comes to you capturing the images in which you are trying to capture.  In simple words, the speed of your shutter when capturing an image, ultimately affects the amount of exposure your camera allows light to come through to affect your image, therefore changing the chances of under exposing or over exposing your image.

It is good to know that, a fast shutter speed creates a short exposure of the film or sensor inside your camera & a slow shutter speed creates a long exposure to the image.


Shutter speed motions can range from different amounts, depending on the camera in which you have. For example, 1/250th is a fast shutter speed, which can create a freeze movement effect, & a ¼ of a second is a slow shutter speed, which can create a blurred movement effect.

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