ExpoDisc Professional White Balance Filter - 77mm lens thread - Get Beautiful Color in Your Photos and Video, Easy-to-Use, No Software Required, Save Time Fixing Color

This is a very trick tool. It serves two functions at once, white-balance and exposure metering. Ever wonder why this is called "Expo" Disc? For this combined role, this is a convenient tool. However, there are times when cards are better.Where space is tight or precision is crucial, such as macrophotography or product photography, a separate white-balance card and exposure card will be more convenient. They can be put in positions where I simply cannot manuever my camera with this filter on.It is useful as a reference. I use this one device as reference for other white-balance cards and gray cards. It is particularly useful for measuring exposure offset of a given white-balance card; white-balance cards are usually a stop brighter than 18. Using the offset, I can use the white-balance card for exposure as well. Good for above tight situations.The build and finish are cheap for the price. This is made entirely out of plastic. And the outer plastic is not particularly well formed. It fits but it could definately use improvement.If you are on the cheap, you can do with a white-balance card and a gray card. But the quality cards are not cheap either. This is a good product and serves its purpose well.

I've been using an ExpoDisc for several years and recently obtained this new model. I've always been very happy with the ease and speed that I get using the ExpoDisc, but more importantly, it almost always gets the colors right, the very first try.That's a big deal to me. Like most any photographer that's been shooting for years, I've accumulated a ton of White Balance tools. I've tried so many that I can't even remember how many there were. I always come back to the ExpoDisc. All of the other WB tools seem to take longer, with much more fuss, to get the colors right in the camera. When I'm out on location, especially with several people who are involved in the shoot, time is a big deal. Most people aren't comfortable being photographed to begin with, so if we're all standing around, waiting for me to set the white balance, people can get frustrated. Sometimes, when you take too long to set up a shot, they think that you don't know what you're doing and will say so.I've never had that problem with the ExpoDisc. It only takes a minute to set the WB and start shooting. My clients are happy, which makes me very happy, especially when the photos come out great and don't need much post processing.Bottom line for me, I'll always have a couple of the latest model ExpoDiscs in my bag.

I read about this product in an article and thought that it would be a great addition to my shooting routine. After reading reviews on it, I finally bit the bullet and purchased this.It came with its own rubber carrying pouch to keep it protected which is very nice and some warm cards to make the WB warmer easier. Have not used it as much as I would like but tested it out today. Here is what I know already. Holding it on my lens is easy (I used it on my 55mm) and switched my camera into the manual focusing mode to take the picture. If you try to use this in AF (auto focus), you will not be able to take a picture. Each camera is different so setting your custom white balance will be different as well. It was easy to set my WB off of the picture taken and once I did, I snapped a few pictures for a test. I was not disappointed! The white balance for those images were what I wanted. I loaded the images up into Lightroom to make sure they were still how I expected and did not have to change anything with the images as far as white balance or exposure. I did not test out the warming cards yet but will do so soon. I doubt I will use those often though due to like how well the WB came out without them.

I bought this product because a friend of mine recommended it to me. Ultimately I decided to return this product which I will explain in my review below, but I can tell you that it does work well.Pros:- First and foremost, this thing works. I tried it in a couple of different scenarios and I can say that it was definitely an upgrade from the in-camera auto white balance.- This product is also very easy to use, you simply snap it on the front of your camera (or you can just hold it over the lens) and take a picture of your light source (assuming that you only have one color of light)- The product is also very small and easy to carryCons:- Since you need to be able to face your light source, be aware that it explicitly says in the manual that it is not recommended for use with on-camera flash. So, if you wanted to use it with on-camera flash, you're out of luck.- Similarly, if you are in an environment with many different types of lights, you are best served taking a picture from the perspective of your subject, pointing back at where the camera will be for the shot. (basically, like using a light meter under your subjects chin) I find this to be a bit slow and troublesome compared to a gray card.Conclusion:Again, this product really does work well and offers a good white balance. If say, you are out and taking a picture of some flowers or something, you could easily cover the lens, take the picture to balance the sunlight, and set your custom white balance. However, for the price, I couldn't see using it enough to keep it, I have a gray card set which I got for free. I could just take a picture of my subject holding the gray card, then either remove the gray card and take another picture, or just crop the card out. Then in post, I could use Lightroom to instantly correct for the gray card. I find this to be much faster, and trouble free. I simply ask my subject to take a photo holding the gray card, then just take it back and take another shot. (which means I'm not actually changing the white balance, but I can correct it in post later). This is a great gadget, but I just don't see it as worth the money over a gray card set.