What is “Lally CAP”?   


Digital Single-Lens Reflex cameras are not capable of reproducing accurate color consistently. Image sensors, A/D converters, and in-camera processing engines cannot set accurate White Balance because a calibrated test target is not included in the optical path to the image sensor. Current camera technology is not able to insert a test target. “Lally CAP” provides this missing link.


Accurate White Balance setting is key to color fidelity. White Balance is best set by using light gathered from the subject scene passing through a calibrated test target, not from in-camera default “presets” or white card reflections from only directly in front of the camera. Capturing color correctly at the time of the exposure by using an accurate White Balance set assures color fidelity and eliminates later image-editing color work.


”Lally CAP” is an innovative, low cost accessory that solves digital camera color problems. It uses scene-specific light combined with reflected light to determine a correct White Balance “set” under any lighting condition, outdoors or indoors. It lets the photographer interact with the subject scene as the craft of photography intended.


 “Lally CAP” stretches over any D-SLR lens for a custom fit and takes the place of a cumbersome to use, awkward to store traditional “white card” which is prone to misleading readings. A white card reflects only the light source directly in front of the camera, not light sources consistent within the scene being photographed. “Lally CAP” inserts a calibrated test target into the optical path for the image sensor to evaluate incoming light and to “set” a custom White Balance from. It is a physical target not an in-camera “preset” default or white card reflection.                                                                  


When the “Lally CAP” is removed and the scene is photographed, the color temperature of light gathered by the lens is correctly interpreted using the accurate custom White Balance setting. The camera then is able to output accurate color balanced digital files for both RAW and JPEG without color casts, not achievable before “Lally CAP”. It has been called “the missing link in digital photography”.


Digital Single-Lens Reflex cameras only provide White Balance presets that are

pre-determined fixed values for a limited number of light sources such as:









Mixed lighting sources are frequently encountered outdoors as well as indoors, but corresponding in-camera presets are not supplied. The presets represent the camera’s pre-determined default values of White Balance for a small selection of light sources. Each preset is an expected average but in reality, conditions for each light source will vary widely from the fixed presets provided in the camera.


For example, a “Daylight” White Balance setting would need to be accurate depending on time of day, elevation above sea level, amount of haziness and percentage of both shadow area and cloud cover in the scene.


D-SLRs do offer an Automatic White Balance setting. Again this is a compromise. Algorithms and processors used are not accurate for all lighting situations. If no white object is present in the scene, Automatic White Balance will render the scene with overly warm tones. “Lally CAP” offers control and color accuracy not possible any other way. It also balances for a wider range of color temperatures than the camera’s Automatic White Balance does.


Our eyes are excellent at judging what is white under different light sources. Digital image sensors cannot do this since they are not able to determine accurate color balance by themselves or from in-camera algorithms and processing engines. Image sensors must “see” light from the scene through a calibrated test target to evaluate and establish an accurate color baseline. Digital camera technology is unable to physically position such a target internally. “Lally CAP” is that target, supplying the missing link in digital photography technology. It assures that digital cameras set White Balance correctly to provide accurate color fidelity.


D-SLRs offer a “custom”, manually set, White Balance which the photographer sets when he desires the most accurate color balance. This option will supply accurate color fidelity when a “Lally CAP” is employed along with it. Outdoor photographers will derive accurate color no matter the mix of light on the scene. Capturing true color in shade where colors are extremely varied will benefit greatly. Studio photographers shooting under a variety of artificial lighting sources for which no in-camera White Balance preset can be made available will solve their color problems. Indoor flash photographers only need to fire the flash at the camera using “Lally CAP” to establish accurate White Balance.


The “Lally CAP” allows discerning photographers to obtain correct White Balance for every photo regardless of lighting conditions. Colors later will not need correcting in image-editors to “match” the “original” scene. There really is no way to remember the original colors unless you: 1) try fooling yourself, 2) plot and record the live scene with a spectrophotometer, 3) take a color film transparency for reference or 4) use a “Lally CAP”.


It takes only seconds to use a “Lally CAP”. It will improve the quality of your color work and save its cost time and time again because every image file will not require color editing.


Work time spent in image-editors for color corrections is eliminated for both RAW and JPEG shooters. This is true because while RAW image files record a White Balance, correct color accuracy is obtained by recording the “Lally CAP” custom setting for later converting RAW files to TIFF or JPEG.


If shooting only JPEG files, correct White Balance is mandatory at the time of exposure because images are final processed in the camera using it. “Lally CAP” assures correct color balance in JPEG with no image-editing time needed for color corrections.


Included with each “Lally CAP” are directions, a bag for storage, a White Balance tutorial and special tips to help you get the best color your digital camera can render.


©Lally Photography 2006

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