- 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
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.