Charts for spherical lenses

The very first custom sharpness calibration charts for 8K cameras.. and more.

Our charts for spherical lenses

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.

YOTTA chart

92×158 cm

Yotta<br />

The YOTTA chart is better suited for larger 8K full frame with sensors of a diagonal greater than 40mm, because it covers the entire image at the optimal test distance.

The Yotta chart in detail

EXA chart

72×122 cm

Yotta<br />

The EXA is ideal for 4K / 6K cameras with a sensor of a diagonal around 30/35 mm.

The Exa chart in detail

TERA chart

54×90 cm

Yotta<br />

The Tera is perfect for smaller cameras and smaller test spaces while benefiting from the same technical features and options as its 2 big sisters.

The Tera chart in detail
YOTTA chart RVZ Prêt À Tourner

YOTTA chart – RVZ – FRANCE

EXA chart FD TIMES Prêt À Tourner

EXA chart – FD TIMES – USA

TERA chart ZEISS Prêt À Tourner

TERA chart – ZEISS – INDIA

Technical specifications of our spherical sights

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.

250 pairs of lines / millimeter

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.
No other sensor has been able to reach that definition so far !

Circular targets

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.

Linear targets

Find linear 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.

Siemens targets

Find many Siemens charts all over the board to manage an easy and quick sharpness calibration.

Frame leaders

No need to take the chart off the wall to make the frame leader test ! The main frame leaders are on the chart: 1.33 – 1.78 – 1.89 – 2.00 – 2.39.

Magnetic support

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.

Aluminum frame

Our charts are fully protected by an aluminum frame. Light and rigid, it helps the manipulation during the tests and prevents bending over time.

Anti-reflection coating

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 !
YOTTA chart EPC Prêt À Tourner

YOTTA chart – EPC – SPAIN

EXA chart BECINE Prêt À Tourner

EXA chart – BECINE – USA

TERA chart LOCA IMAGES Prêt À Tourner

TERA chart – LOCA IMAGES – FRANCE

Accessories included

Magnetic customization

You have the possibility to personalize your chart thanks to the magnetic annotation area provided for this purpose.

Magnetic annotation areas

Write down useful and indispensable technical information on the magnetic writable and erasable annotations areas. This tool shields the entire chart against time.

Magnetic Optical Wedge Scale

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.

Magnetic neutral gray

Add a 18% neutral grey using the dedicated magnetic area.

Magnetic grey scale and grey gradation

2 cross grey scales with 21 steps and 2 cross grey gradation can also be added as magnets on the chart.

ColorChecker® Classic

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.

Magnetic Mirror Centering Aid

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.

Bubble level

A useful level bubble is located at the top of each chart.
YOTTA chart ACLAM Prêt À Tourner

YOTTA chart – ACLAM – SPAIN

EXA chart EMIT Prêt À Tourner

EXA chart – EMIT – FRANCE

TERA chart MYT WORKS Prêt À Tourner

TERA chart – MYT WORKS – USA

Yotta chart

  • Dimensions (cm) : 158 x 92 x 1.3 cm
  • Dimensions (inches) : 62 x 36 x 0.5
  • Weight: 5.5 kg / 12.1 lbs
  • Optimum printing resolution: 5 line pairs / mm
  • Circular targets : yes
  • Dimensions of the central circular target : 45 x 45 cm
  • Linear targets : yes
  • Siemens targets : yes
  • Frame leaders : yes
  • Magnetic support : yes
  • Anti-bending aluminium frame : yes
  • Anti-reflective coating : yes
  • Magnetic personalization area : yes
  • Magnetic annotation areas : 3
  • Magnetic neutral grey : yes
  • Magnetic grey scale and grey gradation : yes
  • Level bubble : yes
  • Mirror centering aid : yes
  • ColorChecker® : yes

EXA chart

  • Dimensions (cm) : 122 x 72 x 1.3
  • Dimensions (inches) : 48 x 28 x 0.5
  • Weight : 4.5 kg / 9.9 lbs
  • Optimum printing resolution: 5 line pairs / mm
  • Circular targets : yes
  • Dimensions of the central circular target : 35 x 35 cm
  • Linear targets : yes
  • Siemens targets : yes
  • Frame leaders : yes
  • Magnetic support : yes
  • Anti-bending aluminium frame : yes
  • Anti-reflective coating : yes
  • Magnetic personalization area : yes
  • Magnetic annotation areas : 3
  • Magnetic neutral grey : yes
  • Magnetic grey scale and grey gradation : yes
  • Level bubble : yes
  • Mirror centering aid : yes
  • ColorChecker® : yes

Tera chart

  • Dimensions (cm): 90 x 54 x 1.3
  • Dimensions (inches): 36 x 21 x 0.5
  • Weight : 3.5 kg / 7.7 lbs
  • Optimum printing resolution: 5 line pairs / mm
  • Circular targets : yes
  • Dimensions of the central circular target : 25 x 25 cm
  • Linear targets : yes
  • Siemens targets : yes
  • Frame leaders : yes
  • Magnetic support : yes
  • Anti-bending aluminium frame : yes
  • Anti-reflective coating : yes
  • Magnetic personalization area : yes
  • Magnetic annotation aras : 2
  • Magnetic neutral grey : yes
  • Magnetic grey scale and grey gradation : yes
  • Level bubble : yes
  • Mirror centering aid : yes
  • ColorChecker® : yes
BandPro Prêt À Tourner charts presentation

BANDPRO – USA

Our savoir-faire

Saving time

Designed by users and for users, the P.A.T. Accessories charts feature all the tools and aids to best fit your camera tests. Cameras that have grown increasingly sensitive and technical now shorten your tests. We have designed our charts to save you maximum time, and enhance comfort and efficiency. You don’t have to take the chart off the wall anymore, everything you need is right here.

Comfort and aesthetics

The P.A.T. charts are also sober and elegant. Each tool relies on technology, but the materials and patterns which make up our designs were thought to highlight your brand. Once imprinted on each chart, your logo enhances the image and identification of your brand. A useful, artistic chart to create Art. In the end, our main concern is the same as yours: to create beautiful images to make beautiful films.

Technological lead

However, this is not the only thing that makes the P.A.T. charts so unique : we offer you the opportunity to get an actual technological head start on your camera and lens tests. As a matter of fact, we have found a way to print the infinitesimal, so as to be able to print up to 250 line pairs per millimeter on your sensor. We are the first ever to achieve such extraordinary printing quality with formats of 160cm wide.

Discover other test charts

DAMIA chart

92×158 cm

DAMIA Prêt À Tourner

Our DAMIA chart, of dimensions 92×158 cm, was designed to check and spot every optical distortion aberration with minimum effort.

  • Checkerboard 72×146 cm

  • Squares of sides 2 cm = 73 squares H° / 36 squares V°

  • Integral magnetic support

  • Aluminum frame

  • Anti-reflection coating

  • Magnetic customization

  • Magnetic mirror centering aid

  • Bubble level

DAMIA NETFLIX chart

107×187 cm

DAMIA NETFLIX Prêt À Tourner

Our NETFLIX DAMIA chart, of dimensions 107×187 cm, was designed to check and spot every optical distortion aberration with minimum effort. The dimensions of the checkboard meet the demands of NETFLIX.

  • Checkerboard 84×180 cm

  • Squares of sides 3 cm = 60 squares H° / 28 squares V°

  • Integral magnetic support

  • Aluminum frame

  • Anti-reflection coating

  • Magnetic customization

  • Magnetic mirror centering aid

  • Bubble level

FRAMA chart

92 x 158 cm

FRAMA Prêt À Tourner

The FRAMA Chart will be very useful to check very easlily the frame leaders of your cameras.

  • Frames: 9/16 – 1.33 – 1.78 – 1.85 – 2.0 – 2.39

  • Integral magnetic support

  • Aluminum frame

  • Anti-reflection coating

  • Magnetic customization

  • Magnetic mirror centering aid

  • x2 bubble level (x1 V° and x1 H°)

STEADA Chart

57 x 76 cm

Steadiness chart Prêt À Tourner
Adjustment-aligment-marks

The Steada test chart is essential for conducting steadiness test on film cameras.

  • Integral magnetic support

  • Anti-reflection coating
  • Supplied with 4 magnetic alignment marks

EPC Panavision – Madrid – Spain


They trust us…

“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