Understanding ISO Sensitivity

By -


ISO refers to the senstivity -the signal gain-of the camera. In simply,ISO is simply a camera setting that will brighten or darken a photo. As you increase your ISO number, your photos will grow progressively brighter. For that reason, ISO can help you capture images in darker environments, or be more flexible about your aperture and shutter speed settings.



WHAT IS BASE ISO?

The lowest native ISO on  camera is  “base ISO”. This is a very important setting, because it gives you the potential to produce the highest image quality, minimizing the visibility of noise as much as possible

 

ISO VALUES

  • ISO 100 (low ISO)
  • ISO 200
  • ISO 400
  • ISO 800
  • ISO 1600
  • ISO 3200
  • ISO 6400 (high ISO)
LOW VS HIGH ISO NOISE VISIBILITY

  Take a look at the comparison below. Pay attention to the level of noise (graininess and    blotchy colors) in the images:



The difference is clear – the image at ISO 3200 has much more noise than the one at ISO 200 (which I brightened with a long shutter speed instead). This is why you should avoid high ISOs whenever possible, unless conditions require you to use them.

Comments

Post a Comment

Popular posts from this blog

Difference Between Raw and Jpeg

By -
Image
  WHAT IS  RAW IMAGE? A RAW format file is basically an unprocessed file captured directly through the camera sensor. The image captured in RAW format is usually dark and flat in contrast as the file is not processed at all, as in the case of a JPEG file. While viewing on your camera’s LCD screen, you would hardly find any difference between the RAW and the JPEG files. But the moment you open the files on your desktop or the laptop, you might me disappointed by the look of the RAW file because of its flat color tones and contrast. At the first look, you might fall in love with the JPEG file, but the truth is that the RAW file holds all the details ranging from the contrast to white balance. Using the RAW file, you can completely change the white balance, brightness, sharpness, contrast, etc., of the image, without degrading the quality. In order to access the RAW file on Adobe Photoshop or Adobe Lightroom, you would need to download the free ...
Read more

What is Shutter Speed??

By -
Image
WHAT IS SHUTTER SPEED? Shutter Speed is the length of time the camera shutter is open,exposing light on to the camera sensors. Shutter Speed is one of the three elements of Exposure Triangle that are responsible for correctly exposing the photos. Shutter speed decides whether to freeze the subject in your frame or to capture a long exposure moment. In this blog post, I am going to shed some light on what exactly the shutter speed is and how you can control it to click various kinds of photos. How Shutter Speed Is Measured?? Shutter speed are measured in fractions of a second. Most modern DSLRs and mirrorless cameras can handle shutter speeds of 1/4000th of a second at the fastest, while some can handle even quicker speeds of 1/8000th of a second and faster. On the other hand, the longest available shutter speed on most DSLRs or mirrorless cameras is typically 30 seconds. You can use a longer shutter speed by using external remote triggers, if necessary. Types Of Shutter Speed 1) Fast S...
Read more