Experiment with Custom White Balance

I often experiment with custom white balance settings in my camera when photographing landscapes as a way of helping me refine my images. I use it to both explore colors creatively and to help with determining if a scene is worth investing my time to photograph. Many times, subtle and not so subtle changes to the camera's white balance setting yields new ideas and more interest in what i'm photographing. Being fully engaged with what you are photographing is probably the most important thing. If you are not engaged, your viewers won't be engaged, and that will show in your image. Using the custom white balance settings in your camera is a great way to explore and expand your photography.

Since I shoot digitally, changing the white balance of an image before I take it is so simple. I don't have to carry and fumble with multiple color filters as film shooters do. With just a few menu and button presses, I can go from a feeling of calm and cool to warm, hot, and vibrant all in the same scene. I thought of using actual color filters to produce the same results but I found an issue in post production where it can be difficult if not impossible to adjust colors to my liking. Since I shoot RAW images and use Adobe Camera Raw (ACR) to help process my images, I can change the white balance settings of the photograph after the fact just as easily as I can with my camera before I captured the image. In fact, ACR really stretches the limits and allows me to go into territory that my camera simply won't allow me to go to with white balance.

Maybe now you are sold on the idea of how beneficial custom white balance settings can be, now I'll explore just how I use them.

On the left is an image taken in Corson's Inlet near Ocean City, NJ one evening, just after sunset, when high tide was receding in the tidal marsh. There's lots of water and lots of sky so the tones and colors are very similar throughout the entire image. This image is shown with the white balance in my camera set to Daylight, which is about 5200K. ACR displays this as 5000K and -8 Magenta.

By the way, I took this with a Nikon D700 and while i'm not familiar with every other camera brand with regards to custom white balance settings, the numbers won't always match up with mine but through experiment and trial and error, you can achieve the same effects here.

In the image above, what words would you use to describe the colors and tones?
Cool? Subtle? Smooth? Relaxing? Soft? Blue?

Those are the types of colors and moods you get after sunset because all we have now is reflected light and no more direct light from the sun. Soft and blue are how I would describe it. As twilight settles in, everything becomes more soft, subtle, and blue until there is no more light left and all we have is darkness. At the time of searching for this image and taking the photograph, I was not feeling soft and subtle and blue. I was feeling vibrant and thrilled standing in a wonderful water world that seemed out-of-this world! A beautiful burst of color was directly above me in the clouds and the reflected light in the water was begging to be captured. The question was at the time, how could I better capture that thrilling and vibrant feeling in an image?

A custom white balance setting was how!

This time I changed the white balance to a custom color temperature of 7140K and then used the fine-tune grid option to introduce more Amber and Magenta. Those settings are A6 and M6. In ACR this image shows as 7450K and +78 Magenta.

The Amber and Blue axis of the fine-tune grid in my Nikon D700 doesn't apply another type of filter. It simply shifts the actual color temperature up or down. This is evident because the custom white balance in the camera was set to 7140K, A6, M6. Fine-tuning the white balance for Amber 6 and Magenta 6 now indicates a color temperature of 9090K. However, in ACR the corrected color temperature is 7450K and +78 Magenta.






What words would you use now to describe the colors and tones in this image?
Dreamy? Vibrant? Unworldly? Exciting? Purply?

This new image is much closer to what I was feeling when I was taking the image and what I wanted to convey. By deliberately introducing a color cast by fine-tuning the white balance in the camera, I am able to change the feeling of the image and more closely deliver what I wanted in the image.

Below is the final image after post-processing. Just a subtle shift in color temperature again and this time to enhance the blues and purples more. In ACR the color temperature is 6200K and +80 Magenta. The shift to a cooler temperature is what is responsible for bringing out the blues and purples more.

Now the one question you may be asking right now that I don't have an exact answer for is, how do I know what color temperature I should use?

You have to experiment. You have to try both when you are taking the photo and then when you are post-processing the photo to see the endless possibilities that are out there. Through trial and error and experimentation are how I usually arrive at a particular setting. Who knows, maybe sometimes when you are in the field taking photographs you later find something more pleasing in post-processing that differs from what you originally envisioned and captured. With the freedom of shooting RAW and software such as Adobe Camera Raw, you are not ever limited or penalized by choices you made when you took the photograph.

There is of course one rule of thumb, so-to-speak, that I can offer that you can use to help with your decision making. Lower temperatures are considered cooler and thus will often yield images with a blue-ish cast. Higher temperatures are considered warmer and will yield images with a golden or yellowish cast. Where things get interesting is when you fine-tune the white balance and you apply a green or magenta cast.

I often apply more magenta when I experiment with white balance. It does a great job of enhancing both red and pink tones and purple tones, depending on what the color temperature is. With cooler temperatures (e.g. 4500K) and a magenta cast, you'll often see deep purple tones. With warmer temperatures (e.g. 6500K) and a magenta cast, you'll often see pinkish tones. I don't often use the green filter in situations such as the one depicted here. However, I can definitely see a benefit with scenes deep within a forest or canopy of lush greens where using the green filter could work.

Results will greatly vary depending on your subject and the lighting of course. These techniques probably won't translate well to portraiture work! Here are a couple of more examples.

These three images were taken a little while after sunrise with some beautiful alto-cumulus clouds in the sky creating a sort of sun pillar effect.

The first image on the left demonstrates what Auto White Balance looks like. ACR reports this as 4000K. Here you can say everything is very blue and cool. The colors in the sky and the clouds were much more brilliant to my eye than this. Its fair to say that this isn't an accurate representation of how that morning looked and felt.

The second image demonstrates a Daylight White Balance setting. ACR reports this as 5500K and +10 Magenta. While there is a bit more color than the first image, it still lacked the punch and vibrancy that I actually saw and felt that morning. Getting there, but not quite all the way there.

The third and final image in this example is the custom White Balance setting I used to take the photograph. This was 5000K, A6, M6 and ACR reports this as 5850K and +76 Magenta. Here now we can see the colors go wild and really draw you into how magnificent that morning really was. Alto-cumulus clouds are some of the finest clouds to lay eyes on and when you couple that with a rising or setting sun, get ready for a wild ride with mother nature nearing her best! Since the colors were so vivid already, I didn't have to raise the color temperature beyond 5000K to really get the pinks and the purples to come alive when applying the Magenta filter.

These two images were taken in the twilight before sunrise. There was a good bit of low clouds on the horizon where the sun would rise and this helped block some of the early light and it seemed to extend twilight just a little bit longer for me.

The first image of two was taken at Daylight White Balance. ACR reports this as 5000K and -6 Magenta (or +6 Green). To me, this again was not an accurate representation of what I was seeing. Deep twilight is very cool and blue and the colors here make me think more of a sea foam green.

The second image is what I took with a custom White Balance. ACR reports this as 4150K and +33 Magenta. By lowering the color temperature and adding a magenta filter I was able to extract a much cooler and softer glow from the scene than previously. Here we see deeper blues and purples with a lower color temperature and some magenta added.

In conclusion...


Don't be afraid and experiment with custom white balance settings both when you are taking photos and afterwards during post-procesing. Don't be afraid to push the limits sometimes and try extreme color temperatures such as 2500K or 10000K or really push the sliders with magenta and green. There are tons of creative possibilities waiting out there and it never hurts to experiment. So give it a try and have fun with it next time you are out capturing the landscapes!

Recovery?

I want to talk about something I've learned recently and that's about the blinkeys, blown highlights or clipping, and the magical Recovery slider in Adobe Camera Raw (ACR). You know, the blinkeys. Those insipid pixels that blink on the back of your camera when you review an image and the camera wants to let you know that you've gone too far and clipping is occurring.

Up until now, I've thought of the blinkeys and blown highlights or clipping as being truly evil and something to avoid at all possible cost because its lost data. 255, 255, 255, pure white, no detail. Something your printer won't even print out because there's no white ink!

In order to combat this we are armed with the Recovery slider in ACR. With one quick movement to the right we can eliminate said blinkeys and blast those blown highlights back into the realm of subtle detail! But alas, sometimes the Recovery slider falsely leads us astray and alters our images with a flattened dynamic range and bleeds any pop from them. What's left is a distant memory of the zeal your original image contained.

All is not lost. I've come to realize that not all blinkeys and blown highlights are created equal. Some are not as evil as other would lead you to believe. Sometimes you don't need to touch that Recovery slider at all!

Above is an image where highlight clipping is obviously occurring. Thanks to ACR we can clearly see that and said areas are highlighted in a fantastic and not so subtle red. Usually I would be tempted to slide the Recovery slider to the right until I've eliminated all clipping. In many cases, you'll end up with an image now with a flattened dynamic range and a lot less pop in the highlights and bright areas of the image. Since there's a lot of sky in this photograph, using lots of Recovery has an adverse affect on the image. You can compromise some, leave some clipping but recover some of the blown out areas.

So what's going on here?


I started thinking about what these clipped highlights actually are and what effect do they have on my final product and image. I typically share my images on the Internet like many do and then I print the images that I like best.

So, for sharing on the Internet, do the clipped highlights really matter? I don't think they do.

What about printing? Hmm, well, yea, I think they do matter.

Why? Well first off like I said before, there's no white ink, and second, my printer has a limited color gamut so it's best to try to process my images so they match my printer's color gamut as much as possible so screen and print match as closely as possible.

With this new thinking, clipping matters to me when I'm printing. And what my printer can print is what I should really be concerned with. That lead me to my next question and discovery...

What colors are actually present in these clipped regions?

Lucky for us ACR has the Color Sampler Tool (S). Select this tool and then select a point in your image and ACR will tell you what color is there. So I did that and selected nine different points in the clipped regions.

Those nine different points revealed some very interesting information from them.

It would appear that many of these clipped regions are not actually pure white which I thought was the case. It appears that only some of the RGB values are 255. True, there were some that were pure white, 255, 255, 255. But others were really really light shades of pink and magenta.

So I know my printer can't print out pure white but maybe it can print out really really light shades of pink and magenta. To test that theory out I let go of all desire to slide Recovery to the right and just clicked Open Image with reckless abandon! Well, maybe I'm exaggerating just a bit.

In Photoshop, I turned on Proof Colors and loaded up a profile I would typically use to print out an image like this. I also turned on the Gamut Warning. The result on my screen was what you see below...

That's not so bad, right?


Seems like my printer can't handle a few regions of really really bright magenta and pink. The gray areas are where my printer doesn't have a color to match the color in those areas. Seems like my printer does a pretty good job of rendering the colors that ACR and the blinkeys normally would lead me to believe were evil!

In fact, if you overlay the ACR image and the soft-proofed Photoshop version, you can see how well the colors would hold up in a printed image.

The darkened red areas are the intersection of the areas that are out of gamut for my printer and what ACR says has highlight clipping. There are even regions where there are out of gamut colors but ACR didn't claim any highlight clipping there.

Now I have a lot of confidence in my printer and its ability to print this image and match colors so well that perhaps the subtle tone and color differences in these out of gamut areas won't even be noticeable in a print. I could find out by printing and reviewing. That sounds like a good test. I could also play the compromise game and go back to ACR and move the Recovery slider and then later play with Hue, Saturation, and Vibrance and use brushes or masks of some sort to try and bring these out of gamut colors back in gamut.

Sounds like a lot of work. Why not just print a test image and see what we see? Maybe things aren't as bad and as evil as we have been lead to believe. Perhaps the print will look great regardless of what all this technology says should not! Perhaps using our eyes and a little bit of faith is all we need instead of examining each and every pixel in our images and being fooled by all the alarms and warnings. Beauty is in the eye of the beholder, isn't it?

So, know what is in your image as far as colors. Know your final product and goal. Know what your printer can handle. Print out a test print. Make adjustments as needed and iterate. Don't just blindly move sliders and alter colors simply because the computer told you there may be a problem. In the end, you'll end up with fewer if any compromises and much better images.

SMDV RFN-4s Wireless Shutter Release for Nikon

The SMDV RFN-4s Wireless Shutter Release for Nikon that I ordered just arrived in the mail today. I've been using the Nikon MC-30 wired shutter release on my D700 until now. The MC-30 does the job but having the remote attached to my camera makes it cumbersome to take out and put back into my bag. I primarily store my camera gear in a Kata Bug-255UL backpack. Space is tight with all my gear so it was a real pain to keep the remote cable attached. I couldn't essentially so having to attach and detach all the time got to be a real drag especially when I knew there had to be a wireless solution out there that would be compact and perform well.




Well my prayers were answered and I stumbled upon the SMDV wireless shutter release on Amazon and decided to give it a try!




The RFN-4s is made by SMDV. A company that I've never heard of but they are a South Korean company so anything made by my peeps has to be good, right? :)




The unit comes in an attract case, worthy to be put on display on the shelves and glass display cases of any good camera store. What you get is one transmitter, one receiver, a small carrying case, a small wrist-like strap for the transmitter, a battery for the transmitter, and of course, instructions. The transmitter is small and fits in your hand easily and resembles a small clicker for presentations. The receiver has a small antenna and overall looks like a miniature walkie-talkie. The transmitter takes a single AAA battery that is included. The receiver is powered by the camera.




I read through the instructions quickly and setting the unit up was simply only a matter of installing the battery in the transmitter, attaching the receiver to the camera, and voilà, take a picture! The receiver screws into the front remote port of my D700 just like the MC-30 remote did. It fit in very securely, no problems with the threads. The little red LED on the receiver began blinking immediately, letting me know that its powered up. Per the instructions, it will auto-power off after 2 hours of inactivity. You can always just turn it off manually by depressing the button on the front of the transmitter for 1 second.




The transmitter operates over the standard WiFi/microwave oven/cordless telephone frequency range of 2.4Ghz. Because of this, it has 16 different selectable channels you can set the transmitter and receiver to in case you get interference from other devices that prevent the unit from working properly. The unit came already set to channel 16 and I left it at that.




From the photos below, you can see the transmitter attached to my camera and its fairly unobtrusive and perhaps even makes the D700 a fair bit more "professional" looking (LOL). 

The unit worked right out of the box without a hitch. Depressing the remote button half-way is just like your shutter release button on the camera. It will auto-focus and meter for you. The front of the receiver actually has another LED that lights up to let you know it is auto-focusing. Next, you just press the release button on the transmitter and your camera instantly takes a photo. A third LED on the receiver lets you know when the shutter is released.




If you put your camera in BULB mode, the transmitter will work as well. In this mode, just depress the remote button until a blue LED on the transmitter lights up. This means the shutter is now open. Press the remote button again and the shutter will close. You don't have to hold the remote button down to keep the shutter open. Nice little function if you ask me.




SMDV claims the transmitter will work up to 100m. That's as long as a football field to us Americans. That's pretty far. I wasn't about to test the ultimate limits of the transmitter myself but I figure I see how it does indoors in my house. Well I can tell you that from 3 floors away, the camera on the 3rd floor, me on the ground floor, the transmitter triggered the shutter flawlessly. Wow, that's more range than I'll ever need. 




So far this little unit is racking up a lot of positive points for me. Its well designed. Compact. Unobtrusive. And works. What's the last thing? It fits in my backpack without having to remove it!




Next test is the long-term test out in the field. I'll carry a spare battery and my old MC-30 as backup just in case. I'll report back after some time of using this to let you know the final verdict but so far this little guy gets 5 stars from me.




You can pick on up on Amazon. They make these for both Canon and Nikon. Just check the compatibility list before you purchase one to make sure it works with your camera. the RFN-4s is said to work with the Nikon D700, D300, D300s, D200, D100 (Battery Grip Required), D3, D3S, D3X, D2, D2Xs, D2X, D2H, D1H, and D1.