Tag Archives: RAW Files

Episode 11 – High Contrast Portrait Photoshop Effect Tutorial

Final Product:

High Contrast Portrait Effect

Show Notes:

In this episode I show you how to create a grungy high contrast portrait effect in Photoshop CC/CS6. This technique is particularly useful when processing images for rock and roll shoots, or when taking pictures where showing the character and life experience is the aim. It will accentuate wrinkles and other flaws but bring out the character in the image. As always the file created and the files used to create this effect can be found below.

Files Used:

The RAW file (Canon .CR2) and .XMP sidecar file with corrections can be found here:

http://bit.ly/15YAdsx (22.5 Meg Zip File with CR2 and XMP file)

Subscribe to my Channels:

Vimeo – https://vimeo.com/shawnkent

Youtube – http://www.youtube.com/user/ShawnKentPhotography

Podcast – http://itunes.apple.com/ca/podcast/shawnkent.net-photography/id687084409

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Episode 9 – Processing Raw Files in Photoshop (ACR)

Show Notes:

In this weeks Photoshop Tutorial I show how to use Adobe Camera Raw (ACR) to process images. This is my own personal Camera Raw processing workflow. I will demystify the histogram, sliders, panels and other options in Adobe Camera Raw and introduce you to the techniques that let you intelligently adjust your images exposure. In this video I use a file that is about a stop and a half underexposed and show you not only how to correct this, but also how to fine tune the exposure, white balance and colour to produce a high quality final. I also show you how to use ACR for adjusting the Tone Curve, Noise Reduction, Sharpening and selective colour adjustment. All the techniques shown can also be applied in Lightroom 5 as the tools are the exact same.

Files Used:

Download the file I used in this tutorial here:

http://bit.ly/18yhOVO  – Camera Raw Sample File (18.9 Meg .DNG Adobe Digital Negative File)

Subscribe to my Channels:

Vimeo – https://vimeo.com/shawnkent

Youtube – http://www.youtube.com/user/ShawnKentPhotography

Podcast – http://itunes.apple.com/ca/podcast/shawnkent.net-photography/id687084409

Thanks for watching!

[Edit: My apologies to my Vimeo and Podcast audience. Some upload issues this week delayed release on these channels. Should be more consistent in the future.]

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Photographic RAW Files Explained

RAW Image Uncompressed

Figure 1 - RAW Image

A Disclaimer: The RAW file type is the digital photography world’s equivalent of a negative. But it is NOT a negative. The RAW file you capture has already undergone re-sampling, quantization, and a bunch of other things that would be too complex to go into here. The only true negative is the original RAW, the film negative. Even still film negatives contain vastly more information about a scene than a RAW file. However it is the closest you can get in a digital camera, and the reality is that the industry has “gone digital”. Film remains the vinyl record and RAW remains the CD. A JPEG on the other hand, is like a humble MP3.

So what is RAW?

To understand what a RAW file is you must first understand how a cameras sensor captures light. Essentially a camera sensor is an array of diodes each sensitive to light. Those sensors are called Silicon Photo Diodes, and exactly the same sort of thing you would find in light meters, motion detectors, etc. Essentially a Silicone Photo Diode is charged by the number of photons striking it. This charge is stored and then converted into voltage. This voltage is then amplified and converted by the ADC (Analog to Digital Converter) into a binary value. Continue reading »

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