The very 1st sharpness charts specially made for 8K cameras ... and more.
Prêt À Tourner offers the world's first range of optical charts with an unrivaled, very high definition printing for this type of product and designed to offer you maximum comfort and speed of execution, thanks to its numerous adjustment tools.
Each P.A.T. camera sharpness chart has the indispensable tools and aid to realize the best camera test. Cameras that have grown increasingly sophisticated and sensitive literally shorten the length of your day in test. Our charts are made to make you gain time, comfort, and efficiency. You don’t have to take the chart off the wall; everything you need is here.
In addition, P.A.T. charts have a sleek and elegant design. All the tools are based on technology but the materials and designs that make up the charts have been thought to highlight your business. Above all, your printed logo on each chart makes them fully yours on your company premises. They are useful and beautiful charts to create beauty. Our main concern is ultimately the same as yours: creating beautiful pictures to make beautiful movies.
But that does not end what makes the Prêt à Tourner Charts so unique. We offer you the possibility to get a real technological head start on the test of your cameras and lenses. As a matter of fact, we found the way to print the very small to allow you printing 250 pairs of lines per millimeter on your sensor, filming the entire chart in full frame. We are the first one to reach that impressive high level of printing on formats 150 cm width. Today, no sensor is accurate enough to reach this definition.
" Last year we needed a big change within our chart testing room, we needed the best for the best Camera teams that usually test our equipment. So we started looking around and visiting some rental houses around europe to get some ideas.
It was during our visit to IBC in Amsterdam when we met Stéphane and his company PRET A TOURNER. We finally found what we where looking for, what we think are the best CHARTS in the market.
But the best was to come. We bought 3 x EXA charts, 1 x YOTTA chart + 1 Anamorphic Chart and... we thought Stephane was going to send the charts by Courier... but we were so glad to discover that he, himself was going to drive the charts to us directly from Marseille to EPC in Madrid. He wanted to bring the charts and explain to us how to use them properly, he also wanted to know our company and meet our team.
So we not only discovered his company, we had the chance to get to know Stéphane as a person, and we became friends. He is so involved with what he has created, and we love it!!! We like that passion he puts in his company, he really believes he has the best charts in the market, and so we do !!!!!!!!! Early this year, EPC TENERIFE ( Canary Islands ) decided to buy 2 more EXA charts. "
Oscar Perez Medina, head manager, EPC (Equipos Profesionales Cinematograficos) - Spain
All our workshop charts have the following technical characteristics. All these characteristics - incredible fineness of printing, different targets, circular, linear or star, integral magnetic support helped by the aluminium corner - have been thought out and brought together with a single aim : the optimization of your calibration test.
The unrivaled printing quality for such kind of large format offers, for the very first time, the opportunity to print up to 250 line pairs on the sensor, filming the entire chart in full-frame (Yotta chart). No other sensor has been able to reach that definition so far!
Find circular targets with different sizes all over the chart. The numbers in the circular targets, in twentieths of a millimeter, stand for the number of line pairs printed on 1 millimeter. Numbers go from 4 up to 55.
Find linear targets with different sizes all over the chart. The numbers in the linear targets, in twentieths of a millimeter, stand for the number of line pairs printed on 1 millimeter. Numbers go from 4 up to 55.
Find many Siemens charts all over the board to manage an easy and quick sharpness calibration.
No need to take the chart off the wall to make the frame leader test! The mainframe leaders are on the chart: 1.33 – 1.78 – 1.89 – 2.00 – 2.39.
The entire support of the chart is magnetized to facilitate the manipulation, using a metallic wall and even magnetic paint. This magnetic support at the back is your assurance of the immediate flatness of the chart.
Our charts are fully protected by an aluminum frame. Light and rigid, it helps the manipulation during the tests and prevents bending over time.
The mat coating of the charts protects the printed ink and avoids any light reflection that could disturb the test. Most of all, you can write on it!
We have developed 3 sizes of charts for you to calibrate your spherical optics:
| YOTTA Chart | EXA Chart | TERA Chart | |
| Dimensions (cm) | 158 x 92 x 1.3 | 125 x 73 x 1.3 | 90 x 55 x 1.3 |
| Dimensions (inches) | 62 x 36 x 0.5 | 49 x 28 x 0.5 | 36 x 20 x 0.5 |
| Weight | 5.5 kg / 12.1 lbs | 4.5 kg / 9.9 lbs | 3.5 kg / 7.7 lbs |
| Optimum printing definition | 5 pairs of lines / mm | 5 pairs of lines / mm | 5 pairs of lines / mm |
| Circular targets | Yes | Yes | Yes |
| Dimensions of the central circular target | 45 x 45 cm | 35 x 35 cm | 25 x 25 cm |
| Linear Targets | Yes | Yes | Yes |
| Siemens Targets | Yes | Yes | Yes |
| Frame leaders | Yes | Yes | Yes |
| Magnetic support | Yes | Yes | Yes |
| Anti-bending aluminium corner | Yes | Yes | Yes |
| Mat coating | Yes | Yes | Yes |
| Magnetic customization area (option) | Yes | Yes | Yes |
| Magnetic annotation areas (option) | 5 | 4 | 3 |
| Magnetic neutral grey (option) | Yes | Yes | Yes |
| Magnetic grey scale and grey gradation (option) | Yes | No | No |
| Level bubble (option) | Yes | Yes | Yes |
| Mirror centering aid (option) | Yes | Yes | Yes |
| ColorChecker® (option) | Yes | Yes | Yes |
You have the opportunity to complement your charts with many options. These options are designed to save you precious time and provide comfort during your optical tests, while reinforcing the identification and image of your company.
We propose the entirety of these options in 2 kits that you can find in the shop when ordering your chart:
You have the possibility to personalize your chart thanks to the magnetic annotation area provided for this purpose.
Write down useful and indispensable technical information on the magnetic writable and erasable annotations areas. This tool shields the entire chart against time.
The optical wedge scale enables you to evaluate and quantify the sharpness of spherical and anamorphic lenses. It gives mathematical data of the sharpness to facilitate technical exchanges between users, such as camera assistants and camera technicians.
Add a 18% neutral grey using the dedicated magnetic area.
2 cross grey scales with 21 steps and 2 cross grey gradation can also be added as magnets on the chart.
Digital cameras may require some color test. You have the possibility to add a ColorChecker Classic® using the Velcro® pads in the middle of the chart without removing it from the wall.
Here is a very smart and useful aid to win time on your camera test! The mirror is handy when it comes to placing the chart perfectly parallel to the image plane in a matter of seconds.
You have the possibility to add a very useful bubble level on the top of the chart.