Verify the back focus of your camera's spherical lens with this Focus Sharpness 5° Spherical Lens Test Magnetic Calibration Chart from Pret a Tourner. The portable magnetic calibration chart features a star-shaped Siemens target with 5° angle rays and very high-definition printing on a matte, antireflection-coated flexible plate to facilitate checking the back focal length on any spherical photo, cinema, or video lens.

For Spherical Lens Calibration    High-Definition Printing    5° Angle Rays    Matte & Antireflection Coating

Related Questions and Answers

Q: 1. Are these printed in CMYK four-color process? Or are they in spot colors?

A: DGK Color Tools Digital Kolor Pro 16:9 Chart Large Color Calibration and Video Chip Chart (Set of 2) are printed on CMYK four color process.

Q: 2. What is the size of these cards?

A: 5 x 7

Q: 3. What’s Type of material is this made of?

A: The Vello LENS-2020 Lens Calibration Tool is plastic.

Q: 4. Is this good for video production as well as photography?

A: I've used them for both and yes they will work for video. However, they are fairly delicate and they aren't coated so I've found it necessary to treat them gently and I keep them in a heavy duty ziploc bag as soon as I've used them to preserve them for as long as I can.

Q: 5. Is there a full 18% grey card on the back of these? I noticed that was mentioned in the comments on another card from the same manufacturer.

A: Yes,. The kit contains two cards, each of which is a gray card on the back, plus instructions.

Q: 6. The one review does not give a proper review .Can someone please explain why this chart is supposed to be so nice ?Thank youMike

A: This chart is for big budget video productions. At that level you need everything to be operating at top level. This chart will make sure your cameras lenses are calibrated to the highest degree possible. In such a high level big budget situation, the high cost of the chart is chump change when reputations and corporate budgets are on the line. In such a situation you do not want to say to the networks chief technical executive Sorry the cameras look like junk but we got a great deal by using a cheap chart.

Q: 7. Does my Nikon D7500 has AF fine tuning and will this work well with my lenses and that camera?

A: Yes, the Nikon D7500 DSLR Camera has AF Fine-Tune. One can use the Vello LENS-2020 Lens Calibration Tool to fine tune focusing with lenses on that camera.

Q: 8. Does anyone have the current website for downloading the script software? The link given takes me to a different website. Thanks in advance!

A: You may e-mail the manufacturer directly at dgkcolortools@gmail.com with your inquiry and they can e-mail you the link for the script software.

Q: 9. How is this product constructed?

A: IT is printed on a light cardboard. I hope that I understood your question.

Q: 10. Can you use it with Davinci Resovle ?

A: Yes, the Digital Kolor Pro can be used with Davinci Resolve.