Unlike the old school point and shoot cameras, Digital SLR’s or simply DSLR cameras works in a combination of different settings and features. The three main aspects of a DSLR camera to capture a perfectly exposed images are Shutter Speed, Aperture & ISO. All these settings are interrelated to one another.

Shutter Speed: This setting controls how long the shutter opens to expose the image sensor to that light. Open it for just a millisecond and you can freeze a fast moving subject. Alternatively, you can show the movement of a fast moving subject by keeping it open longer with a slow shutter speed.

Aperture: The aperture setting controls the size of the lens opening that allows light into your camera.You can blur the foreground and background that bracket your subject (known as shallow depth of field) by opening up the aperture with a low f-stop number; alternatively, you can keep your photo sharp from the foreground through to the background (known as wide depth of field) by closing the aperture down with a high f-stop number.

ISO: With the ISO setting a camera’s image sensor can be adjusted to detect more, or less light as needed for a good exposure. High ISO will cause graininess so as a rule use the lowest ISO possible. The photo effects you want to achieve with the aperture and shutter speed will impact the amount of light reaching the sensor, so use the ISO to adjust its sensitivity to get a good exposure.

Now, if you are planning to buy your first DSLR or you have just got your hands on one. The first thing you should do is understanding the basics of it.

Here are 5 web applications or camera simulators to help you learn the basics of DSLR camera.

2. CameraSim

CameraSim is a tool that make DSLR photography accessible for anyone who wanted to learn it. While nothing can replace a real camera, CameraSim has played in enlightening budding photographers all over the world.

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