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ExpoDisc 67mm Digital Neutral White Balance Filter

by ExpoDisc Pro White Balance- Filter 67mm

Price: 74.90
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Usually dispatched within 2 to 3 days.
Dispatched from and sold by Smart Shop UK.
  • Provides consistent, accurate colour
  • Convenient, fast and easy-to-use
  • Ideal in Works in mixed and difficult lighting
  • Reclaim your time spent on the computer correcting colour
  • Assembled and tested in U.S.A. to strict standards of neutrality and overall light transmission


Product details

  • Product Dimensions: 7 x 7 x 1.3 cm ; 41 g
  • Boxed-product Weight: 907 g
  • Item model number: EXPOD67
  • ASIN: B0002GFOSA
  • Date first available at Amazon.co.uk: 6 Mar 2008

Product Description

Product Description

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 aluminium filter mount
  • Includes filter 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 colour adjustments.

When used to set a custom white balance, the ExpoDisc consistently produces excellent colour 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 colour temperature of light passing through the ExpoDisc to make an “in-camera” colour adjustment. This colour 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 colour adjustments when setting a custom white balance.

Using an ExpoDisc is also easier than using unwieldy exposure targets and grey 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 colour casts to resulting images because the tool itself changes the colour of light against which the camera applies the colour correction.

How are ExpoDiscs constructed?

ExpoDiscs are made from multiple layers of custom formulated materials contained within a high grade anodised aluminium filter ring. Each ExpoDisc filter combination is adjusted by hand to achieve its neutrality. To ensure that every ExpoDisc is neutral, we measure and calibrate each ExpoDisc 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 and 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 colour 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. If you’re shooting RAW, simply download your images as shot and save yourself valuable time correcting colour. 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 colour casts and inconsistent colour.

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.

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 colour. 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 colour 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 colour results and the colour temperatures assigned to the camera's Preset white balance settings often do not reflect real world lighting conditions, causing a colour-cast.

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

Product Description

L+) EXPODISC 67MM WHITE BALANCE


Customer Questions & Answers

Customer Reviews

There are no customer reviews yet on Amazon.co.uk.
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Most Helpful Customer Reviews on Amazon.com (beta)
Amazon.com: 4.6 out of 5 stars  7 reviews
8 of 8 people found the following review helpful
5.0 out of 5 stars a must have 25 Sep 2010
By Sunburn95 - Published on Amazon.com
Verified Purchase
I like shooting in JPGs to avoid playing around in photo editing software after shooting RAW. For complicated lighting, this expo disc is a must have. For professionals, who take pictures for a living, this is not a perfect solution, since it only averages the different light sources and turn it into gray pre-set for your camera. But for the rest of us who just like to take almost-pro like pictures without having to deal with a lot of complicated steps before we snap the shutter, then this is a keeper.
4 of 4 people found the following review helpful
5.0 out of 5 stars White Balanced 27 Dec 2010
By William Guth - Published on Amazon.com
Verified Purchase
There are several ways to achieve white balance and the ExpoDisc is perhaps the quickest and most convenient. Whether you are an amateur or a professional, the ExpoDisc when used correctly is going to give great results every time. This is a great tool to have in my photography arsenal because it is so light weight and small. I keep other white balance techniques and accessories handy, but now I reach for the ExpoDisc first. Its a professional photography tool that can certainly help an amateur or intermediate shutter bug catch up with the pack. If you're still working on collecting lenses, buy a bigger disc that your lens biggest opening, in case you end up buying larger lenses in the future; in that you can get the same great results by holding the ExpoDisc over the lens as you would if it locked into your lens.

ExpoDisc EXPOD67 67mm ExpoDisc Neutral White Balance Filter
1 of 1 people found the following review helpful
5.0 out of 5 stars ExpoDisc - A Great Piece of Kit 7 Dec 2013
By Kamal Darus - Published on Amazon.com
Verified Purchase
A great piece of kit for an amateur like me. It simplifies the whole process of getting the correct white balance in most situations indoor and outdoor, with and without flash.
13 of 19 people found the following review helpful
3.0 out of 5 stars ExpoDisc test result 20 Nov 2007
By User - Published on Amazon.com
I purchased ExpoDisc 72mm. Here is test result, using Photoshop:

SETUP: Took a gray frame under incident light source per ExpoDisc instruction, using camera Canon EOS 40D, 28-135mm lens.

IMPORT to Canon software "Digital Photo Professional" FOR WHITE BALANCE: Use this gray frame to do white balance itself. A result of a final Gray Frame.

IMPORT this final gray frame to Photoshop FOR MEASUREMENT: Using Photoshop Color Sampler Tool.
Result finding in 256 color scale (0 - 255):

Green & Blue = Mostly about equal.
Red = Always about 10 (in 256) value higher than the other two.
Example:
Green = 112
Blue = 114
Red = 124

I repeated this type of test several more times, result are still much off from scientific theory or way out of range (10 in a range of 256 or 4% error from neutral).
Supposely: Red = Green = Blue to call Neutral.

So this ExpoDisc is for convienent only. OK for none important picture. Way too high price for a non-precision piece.
4.0 out of 5 stars Slight Learning Curve but Fantastics Products 2 Dec 2013
By Kelly B. - Published on Amazon.com
Verified Purchase
After my first experience with a fake Expo that did not work (Beware of fakes on here!) I purchased from another dealer and received a REAL Expodisc. The first night I had it I hated it. But, don't let that stop you from purchasing because I also hated my Macbook Pro when I got it and now I wouldn't go a day without it in my life! The expodisc has a learning curve which on my Sony cameras was a bit tricky. Once I got the kinks ironed out I utilized it at a indoor shoot with horrific colorcasts and it worked amazingly. My editing time in PP was cut at least in half thanks to the expodisc. If you're a photographer, buy one. Don't think twice... just buy it!
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