Showing posts with label Custom White Balance. Show all posts
Showing posts with label Custom White Balance. Show all posts

Monday, July 01, 2013

Metering is a wonderful thing.


I have two lazy habits that sometimes sabotage my best intentions when making photographs. I've gotten used to using cameras in automatic settings when shooting quickly, outside. I let the cameras set the white balance and the basic exposure. It make sense in a lot of situations but when you get into the studio and you are inventing the light it pays to do two things on every shoot. The first is to use a light meter. In my opinion an incident light meter is the only metering tool that works every time. The second thing I always do, if I am being mindful of quality in the studio, is to make a custom white balance. Here's the tricky thing: White balance affects exposure. Exposure affects white balance. I always meter first and then I do my custom white balance.

When I do a custom white balance I use the exposure I've gotten from metering instead of relying on the camera to compensate.

You may be able to make adjustments in raw to your exposures and your overall color balance but they will be compromises and you'll see it in non-linear color casts in shadow areas and you'll regret not metering when you find that the histogram in your camera convinces you to underexpose in nearly every situation. That under exposure robs you of detail in your shadows (if you want it) and adds color noise to the overall file as you "lift" exposure to get where you should have been all along.

We (collectively; not royally) tend to use RAW as a 24/7 crutch and a convenient excuse not to practice our craft with the diligence and mindfulness that we could. We've come to believe in an industry wide mantra which states that RAW is always better than a Jpeg file. I've done some technical digging and I'm here to tell you that a Jpeg file that is accurately metered and color balanced at the time of capture spanks the heck out of an underexposed RAW files that's brought back under control in post. And part of the problem is color shifts due to exposure differences.

I don't care what the web says on this. Every studio photographer and videographer needs to own and know how to use an incident light meter to work at a high quality level. And every photographer and videographer looking for consistency and quality should know how all their cameras make custom white balances. Over time it will save one much time and energy. Once you practice mindfully using your meter you'll walk off your shooting sets knowing that you've nailed the technical stuff. Getting the emotion right is a different beast. Don't let the technical get in the way of the wonderful....

And, yes, I get the irony of using a black and white image as the illustration for the top of the article. For all the literal folks, here's a color version:





















Sunday, February 03, 2013

Ice Cream and Bread Pudding. Sony and LED lights.


I'm so happy I took a refresher course in food photography by buying Nicole S. Young's book on food photography. It was easily my most effective purchase of continuing education in all of 2013. The underlying principles of the craft are pretty much the same as they've been for quite a while but Nicole did a nice job explaining them and reminded me to use certain techniques that just make food look better. The printed book is a whopping $14 on Amazon. And it's useful even for people who don't necessarily shoot food. Just buy it and put it in your library. Pull it out next time you plan on cooking something great and you just want to show off your culinary chops to your friends.

So, why was I re-reading Nicole's book? Because I'm working with a gifted marketing guy on a restaurant project. My part of the project (as I'm sure you've guessed by now) is to make heroic and tasty shots of the food. The image above is one of many we shot last week. Right before my immersion into boots.

This image was lit by two big 1000 LEDs above and behind the food. The two LED panels are scrimmed or modified by a white diffusion panel on a 24 inch by 36 inch frame. They are color corrected with 1/4 minus green gel filters. While they are called minus green filters they are actually magenta. The magenta cancels out the green, hence minus green in the name. I get them at a movie supply house here in Austin called, GEAR.

The backlight is reflected back into the front of the food by two big, white reflectors. The reflectors are used as close to the food as I can get them and still keep them out of the shot.  I love the way the back lighting makes the green mint leaf translucent.

I shot this wonderful combination of ice cream, drizzled caramel and bread pudding in a hurry to I could catch it before it all melted into itself. But at least the melting process was slower than it would have been with tungsten lights. Even the tungsten lights in electronic flash modeling lights.

Before the dish arrived on the table I did a careful custom white balance using a small, collapsible Lastolite gray/white balance target. Getting the color balance nailed down in the shooting process means more consistent files in post production and, by extension, more consistent exposures. Get one of the targets and stick it in your bag. It will improve the technical quality of your work. Really.

I used my Sony a99 camera with the 70-200mm f2.8 G lens to make this image. I used the lens near 180mm and as close as it would focus, cropping a little bit to get the exact composition I wanted.

We wrapped our Austin food shoot around 6pm and I was in San Antonio by 8pm to get ready for the next day's shoot. The economy seems like it's really thawing out. I'm busy and loving it.