Chris Marquardt ...Raw

Episode 1117

Chris heard the call from Caleb who wanted to know about shooting photography with Raw and he decided it was a great topic for today's photo segment. Chris says Raw is a topic that he always gets questions about. On the sensor, there are three color channels, red-green-blue. The sensor collects the light, converts them into an electrical charge and then processes it into pixels with a charge. The charge is what determines the color of the pixel. So you essentially end up with three pictures of the same image in red, green and blue. And then it's mixed up and saved into a Raw file. That's why you need to process it. First it must be "demosaic'd" in order to get the image all put together. But the camera also creates a built in JPEG file that your camera sees on the LCD screen.

The problem with shooting JPEG is that the camera does all the processing and throws away a LOT of the data. And it throws away about 80% of the color, contrast and other color information. And you end up with artifacts, strange banding and purple colors. Raw is always best for the source image that you can then "tweak" into what you want it to be. And even if you only save as JPEG, a camera still starts with a Raw image. The only difference it, the camera is processing the data, instead of your image program.

Leo also just bought the Sony A7S, which is strangely a 12MP processor, but it has larger pixels that is supposed to work better in low light. And Leo says it does! It's a great camera and it's completely silent.