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  • ExpoDisc 52mm Neutral White Balance Filter EXPOD52
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ExpoDisc 52mm Neutral White Balance Filter EXPOD52


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ExpoDisc 52mm
  • Provides consistent, accurate color
  • Calibrated and certified for neutrality
  • Use in ambient, studio or mixed light
  • Convenient, fast and easy-to-use
  • Assembled and tested in U.S.A. to strict standards of neutrality and overall light transmission
1 new from $147.71

Product Details

Size: ExpoDisc 52mm
  • Product Dimensions: 2.2 x 2.2 x 0.5 inches ; 1.1 ounces
  • Shipping Weight: 1 pounds
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B000YK0KC4
  • Item model number: EXPOD52
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (107 customer reviews)
  • Date first available at Amazon.com: October 2, 2001

Product Description

Size: ExpoDisc 52mm

From the Manufacturer

ExpoDisc Professional Custom White Balance Filter

ExpoDisc on Camera
The ExpoDisc easily mounts to your camera's lens by pressure mount or can be held over smaller lenses.
Features:
  • Quickly set white balance for photo and video
  • Meter 18% Incident Exposure
  • Individually hand calibrated, tested and certified in U.S.A.
  • Durable aluminum filter mount
  • Includes nylon storage pouch and black woven lanyard
GrayBeforeAfter
ExpoDisc custom white balance (left) and Auto White Balance (right). Images copyright Zach and Jody Gray.
Why should I white balance with an ExpoDisc?

Because it saves time. The ExpoDisc White Balance Filter can be used to quickly set a custom white balance, virtually eliminating the need for RAW and JPEG color adjustments.

When used to set a custom white balance, the ExpoDisc consistently produces excellent color in natural, artificial, and studio lighting, and it even excels in difficult mixed lighting environments.

How does the ExpoDisc work?

Your camera’s internal light meter measures the color temperature of light passing through the ExpoDisc to make an “in-camera” color adjustment. This color adjustment is applied to all subsequent images taken using the custom white balance applied from the selected light reading.

Or, if you prefer shooting in RAW and batch processing later, simply capture a reference image through the ExpoDisc to use later with your image processing software.

How is the ExpoDisc different from other white balance tools?

The ExpoDisc is more accurate than other white balance tools because it is hand calibrated and certified for an 18% light transmission across the visible spectrum. We individually adjust each ExpoDisc using multiple custom filters to correct for any variation in base materials. This precision ensures that your camera applies the correct color adjustments when setting a custom white balance.

Using an ExpoDisc is also easier than using unwieldy exposure targets and gray cards, awkward tools that often require an extra set of hands to hold and position properly. To use an ExpoDisc, simply attach it to the end of your lens before setting a custom white balance or metering for exposure.

ExpoDiscLabChart
ExpoDisc representative Lab values: L*=49.40,a*=.-.06, b*.04, Z%=17.90 These representative Lab values were produced by measuring light passing through an ExpoDisc using a transmission spectrophotometer.
Why is it important to use a spectrally neutral white balance tool?

Only tools that reflect or transmit light evenly across the visible spectrum can be trusted to work properly in a variety of shooting environments.

As the inventors of the Custom White Balance Filter, we have always gone to great lengths to ensure the neutrality of every ExpoDisc. Any non-neutral white balance tool will introduce color casts to resulting images because the tool itself changes the color of light against which the camera applies the color correction.

How are ExpoDiscs constructed?

ExpoDiscs are made from multiple layers of custom formulated materials contained within a high grade anodized aluminum filter ring. Each ExpoDisc's filter combination is adjusted by hand to achieve its neutrality. To ensure that every ExpoDisc is neutral, we measure and calibrate each ExpoDisc at our California facility for 18% light transmission and neutrality across the visible spectrum (400nm to 700nm). This 18% light transmission is ideal for setting a custom white balance, as well as metering for incident exposures in ambient light.

Will the ExpoDisc work with my camera?

The ExpoDisc can be used with any digital camera with a custom white balance capability, including all digital SLRs and most point & shoot cameras. The ExpoDisc works with all major camera brands, including: Canon, Nikon, Sony, Pentax, Olympus, Samsung, Lumix, and Leica.

TreesBeforeAfter
Auto White Balance in daylight (left) and ExpoDisc custom white balance (right). Images copyright Terry Livingtsone.
How do I use the ExpoDisc?

Getting great color with the ExpoDisc is easy. To set a custom white balance with the ExpoDisc, simply place the disc in front of your lens and follow your camera’s custom white balance procedure to capture an incident light reading through it. For most cameras, this procedure takes about 15 seconds. That’s it. If you’re shooting JPEG you’re done. And if you’re shooting RAW, simply download your images as shot and save yourself valuable time correcting color. No special software, and no post processing required.

Does the ExpoDisc work for video applications?

Yes, the ExpoDisc can be used to quickly white balance any digital video camera with a custom white balance function. White balancing your video camera with an ExpoDisc will save valuable time in the editing room adjusting for color casts and inconsistent color.

How does the ExpoDisc attach to my lens?

The ExpoDisc was designed to make white balancing your camera easy. To help accomplish this, the ExpoDisc quickly attaches to the lens using an innovative friction mount design. When gently pushed into a threaded lens or filter, three small spring loaded ball bearings located around the filter ring slide over the lens threads to hold the filter in position until removed.

Do I need to buy an ExpoDisc for all my lenses?

No, if you have multiple lenses you can purchase an ExpoDisc to fit your largest lens. When using smaller lenses, simply hold your larger ExpoDisc flush over the end of the smaller lens.

What ExpoDisc filter sizes are available?

ExpoDisc Professional Custom White Balance Filters are available in standard filter sizes, including 52mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, as well as 4x5.65 Video Format Filters.

Every ExpoDisc is individually hand calibrated, tested and certified in U.S.A.

Contents:
  • ExpoDisc White Balance Filter - Neutral
  • Nylon Filter Pouch
  • Black woven lanyard
  • Certification Card
  • QuickStart Guide
What is a custom white balance?
WeddingCakeBeforeAfter
Auto White Balance (left) and ExpoDisc custom white balance (right). Images copyright David Guy Maynard.

Even the best digital cameras struggle with consistently reproducing accurate color. Images shot with incorrect white balance may have unnatural looking red, yellow or blue tints that are time consuming and difficult to correct.

To help photographers cope with this problem, digital camera manufacturers have designed their cameras with multiple white balance functions, including Custom White Balance, Automatic White Balance (AWB), and factory Preset color temperature settings for Sun, Shade, Tungsten, Fluorescent, Flash, and Cloudy. When shooting, photographers must select one of the camera's fixed white balance settings to apply in-camera, or to apply later in post processing if using the RAW file format.

Unfortunately, Auto White Balance (AWB) often produces maddeningly inconsistent color results, and the color temperatures assigned to the camera's Preset white balance settings often do not reflect real world lighting conditions, causing a color-cast.

Using the Custom White Balance function remains the most reliable way to consistently reproduce accurate, balanced color in digital cameras. The custom white balance function eliminates the inconsistencies of AWB and the gross generality of factory Preset color temperatures because it allows the user to calibrate the camera to an exact color temperature at image capture. The custom white balance procedure requires a neutral reference like the ExpoDisc to measure the color of light accurately.

Product Description

The ExpoDisc white balance filter allows digital photographers to quickly and easily set an accurate custom white balance. Each ExpoDisc is individually assembled, calibrated and certified for neutrality in the visible spectrum, and for 18% light transmission. The ExpoDisc can be used on-the-fly to set a white balance in-camera when shooting JPEG, or later in post production when shooting RAW. Using an ExpoDisc to set a custom white balance results in consistently balanced color and eliminates many of the yellow, red and blue color casts commonly seen in digital photography. The ExpoDisc is easy to use. Setting a white balance with the ExpoDisc eliminates many of the inconsistencies and inconveniences associated with using white balance cards and targets, including unwieldy size, unwanted reflectivity, improper angling, and shadows. To set a white balance with an ExpoDisc, simply take a photograph of the light source (incident light) through the ExpoDisc, then follow your camera's instructions to set the camera's custom white balance. Because the ExpoDisc is calibrated for an 18% light transmission, you can also use it as a reference tool for manually determining proper exposure. The ExpoDisc is available in a variety of sizes to fit most popular lenses. The ExpoDisc does not thread into the lens; instead, its quick mount design can be pushed-on and popped-off to facilitate a quick white balance.

Customer Questions & Answers

Customer Reviews

I was questioning if I should actually spend this much money to purchase this disc.
wonderfullymade
Because in order to use the ExpoDisc effectively, you have to set the custom white balance every time the light situation changes.
Mike D.
I find it more effective than a grey card, especially in difficult lighting situations or strong color casts.
jbr

Most Helpful Customer Reviews

86 of 86 people found the following review helpful By Sam on August 24, 2009
Size Name: ExpoDisc 77mm
I don't remember how I came to learn about this tool, but I bought it in a store for my Nikon D300 without reading any reviews. I did try it out in the store and I was immediately impressed with the results so I bought it on the spot.

The disk is amazingly well packaged. It's packaged just like an iPod that I received some years back. It doesn't have the scrimpy, we-don't-care Made-In-China feel. It comes with a lanyard, a semi-rigid pouch that you can attach to your belt, a CD with all of the PDF instructions in multiple languages and a how-to video.

Their web-site also has instructions on how to set the Nikon D300 pre settings.

For years, from the time I got my first DSLR I've been plagued by color balance issues. It seems that I have to color correct each and every photograph in Photoshop. I shoot in RAW so that I have more control but it takes so much more work and time. I'm also not very good with color correctly with PS. I have all the instructions and I follow them carefully, but I always had problems getting the hang of it.

I own gray cards but they're bulky and I don't walk around with one. I also haven't had very good luck with them either. I'm sure it's my technique but I never did get the hang of it.

Shooting under artificial light is a real pain. Auto WB never really works.

I first tried the ExpoDisk in a room lit with CFs (Compact Fluorescent) bulbs. I used the ExpoDisk as directed and I received absolutely perfect results the first time. Then I tried another room lit with LEDs. Again, perfect results. I put a Gretamacbeth colorchecker chart in each of my test shots. Every time, the whites are whites and the blacks are black. Zero color cast.
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52 of 53 people found the following review helpful By ppmd on April 1, 2007
Size Name: ExpoDisc 77mm Verified Purchase
If you struggle trying to "fix" your images' white balance after your digital capture, this item is your answer. Put it on over your lens, point it toward the dominant light source (such as that funky incandescent / fluorescent light mixture in most homes), take a photo, and set the Custom White Balance in your camera. That's it! I have captured photos using home/indoor lighting, stage lighting, etc. NO MORE TWEAKING WHITE BALANCE IN PHOTOSHOP! It's dead-on every time.

I take this with me wherever I know there will be mixed lighting and use it before I photograph. You will be impressed as I am.
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35 of 37 people found the following review helpful By David A. Morehead on January 27, 2008
Size Name: ExpoDisc 77mm
I read a lot of reviews of the expo disc and decided to give it a try. It is so easy to use and the results are sooooo much better than auto white balance. Like anything else in this world, it is only a tool; it doesn't do miracles. But, when it is used correctly, it helps make your photos look fantastic. Initially, I hated having to pay $100 dollars for it. I thought, "What a rip-off for such a little lens" But, after I saw the results I quickly realized how valuable it is to me. Once you get accurate colors, you'll never want to go back to auto and presets again!!! Imagine being able to shoot jpgs that have correct color. I hate shooting Raw because the file sizes are huge and there is always the extra step of converting them to a format that anyone can view. When I use the expo disc I can get the color right the first time and not have to sit in front of a computer tweaking the color of thousands of photos! Even if you like to shoot Raw, it still saves you time because you won't have to edit the white balance on every photo taken indoors.

This is a lot more convenient than using a gray card and it is more accurate.
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20 of 22 people found the following review helpful By Stephen Jackson on September 1, 2010
Size Name: ExpoDisc 77mm
As other reviews have already said, this thing is accurate and convenient when dealing with mixed lighting or when you just want a dead-on white balance.

For me, it's greatest strength isn't actually the fact that it gives you an accurate white balance - there are other products that can do it, too. It's about how FAST it is to use this.

I also own a PhotoVision Calibration Target and an X-Rite ColorChecker Passport. While both of those play their own role, neither hold a candle to how fast you can use the ExpoDisc, and on a fact-paced shoot (ie: wedding day), speed is key. Pop it on the lens, take a picture, DONE. Change lighting - pop it on, take picture, DONE.

Usually, I don't even bother setting custom WB in-camera. I batch apply the WB of the still ExpoDisc picture to all the photos that follow in Lightroom. When I get to a new picture taken using the ExpoDisc, I know to apply that new WB to the next batch of pictures. SO EASY.

As a side note, you don't need different sized ExpoDiscs for your different lens sizes. It works just fine to buy for your biggest lens and manually hold the disc over smaller lenses.
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23 of 27 people found the following review helpful By Aaron Lee on January 30, 2007
Size Name: ExpoDisc 58mm
This product works amazing. Currently in my photo class we are going over white balance and we did some testing. we shot a gray card (has black, 18% gray, and white) and set that as our custom white balance and it worked good. We then shot just the 18% gray. We then used the expodisc and the results were almost night and day. The white balance was perfect. the whole class was amazed. the ease of this product can not be surpassed, your shots will come out noticeably different. I would whole heartedly recommend this product to anyone who is shooting digital.
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