Canon eos5d manual Self Cleaning Sensor Unit Construction Diagram

IV. PERFORMANCE AND RELIABILITY 34

Cosmetic changes on the EOS 50D include the addition of a silver coated Main Control dial with knurled wheel pattern, a classier paint finish overall and a modified rubber pad next to the grip. To increase the sensors’ resistance to microscopic and larger dust particles, several improvements were made to the existing design of the Integrated Cleaning System found in the EOS 40D and in the full-frame EOS-1Ds Mark III. These improvements are found in the EOS 50D and in the newly designed, Integrated Cleaning System on the full-frame EOS 5D Mark II. The first involves the careful choice of camera components with low particle wear characteristics. Next, a fluorine coating is added to the front low-pass filter. This coating is more resistant to dust adhesion, making the use of a bulb blower (compressed air is not recommended) more effective at removing air-borne dust particles.

EOS Integrated Cleaning A fundamental aspect of the Integrated Cleaning System is the Self Cleaning Sensor Unit, System which uses a piezoelectric element to ultrasonically shake dust off the sensor. This occurs

automatically at camera startup and shutdown, and can also be activated manually via menu control. With both cameras, if sensor cleaning is manually activated, the shutter blades cycle (you’ll hear a click as they do) to insure nothing on the rear of the blades could later fall onto the face of the sensor. Particles of dust that fall off during this vibration stick to absorbent materials lining the outer edges of the filter system. The third

component of the Integrated Cleaning System is a software solution, allowing users to automatically “clone” any remaining dust from their RAW or JPEG images with the included Canon Digital Photo Professional (DPP) software. You can map the dust on the sensor using the Dust Delete Data function. DPP software can use that data to remove the trouble spots on all images. And unlike typical image-editing software, this automatic removal can be done to batches of images, automatically—even when the subjects in each image are completely different.

Self Cleaning Sensor Unit Construction Diagram

Sealing material

Piezoelectric element

Low-pass filter -2

CMOS sensor

Phaser layer

Infrared-absorption glass

Low-pass filter -1

Support material