High Resolution 8.5x11 Chrome SD Professional Lens Test Chart, 3-Pack

The CSD Professional lens testing chart is a multi-pack set that comes with 3 copies of the identical chart. It's a great tool for testing lens characteristics such as distortion and focus calibration on any camera or video system. However, it's worth noting that the colors on the chart are not from a quality machine and may not be suitable for precise color reference work requiring L*A*B* color values. The set doesn't come with detailed instructions, but users can find them online by searching for "calibration lens digital." It's recommended to use this chart at a minimum distance of 4 feet. The grey background on the sheet is not intended to be used as a grey card. Customer reception: - The product is a useful tool for testing lens characteristics. - It's a good gift for photography enthusiasts, but they may need to self-educate themselves on how to use and interpret the results. - The chart is as described with clear printing but some users expected thicker card stock. - Some customers were able to get similar results by printing the chart off a home photo printer. - The chart is not suitable for precise color reference work. - The set is priced well for what it offers. - Users were able to test their cameras and lenses and got excellent results. - Some users would prefer a larger size.