Image sensor format

In agenda photography, the angel sensor architecture is the appearance and admeasurement of the angel sensor.

The angel sensor architecture of a agenda camera determines the bend of appearance of a accurate lens back acclimated with a accurate camera. In particular, angel sensors in agenda SLR cameras tend to be abate than the 24 mm x 36 mm angel breadth of full-frame 35 mm cameras, and accordingly advance to a narrower bend of view.

Lenses produced for 35 mm blur cameras may arise able-bodied on the agenda bodies, but the beyond angel amphitheater of the 35 mm arrangement lens allows exceptionable ablaze into the camera body, and the abate admeasurement of the angel sensor compared to 35 mm architecture after-effects in agriculture of the angel compared to the after-effects produced on the blur camera. This closing aftereffect is accepted as field-of-view crop; the architecture admeasurement arrangement is accepted as the acreage of appearance crop factor, crop agency for short, or focal-length multiplier.

Sensor size

All added things actuality equal, a beyond sensor captures images with greater activating ambit than a abate sensor. The beyond breadth provides a beyond "well" in which photon-freed electrons can accrue afore overflow (highlight clipping) occurs.

As of December 2007, abounding DSLRs accept sensor areas about 370 mm2, while abounding bunched camera sensors accept one-fifteenth the apparent area: a accepted 1/2.5" sensor has a apparent breadth of 24.7 mm2. Thus, a archetypal DSLR will accept a signal-to-noise arrangement that is about 4 times college than a archetypal bunched agenda camera: \sqrt{370/24.7} \approx \sqrt{15} \approx 3.9

Common image sensor formats

Digital SLR formats

As of June 2009, best consumer-level SLRs use sensors about the admeasurement of a anatomy of APS-C film, with a crop agency of 1.5-1.6. A notable barring is the Four Thirds System of cameras, mostly fabricated by Olympus and Panasonic, which use abate sensors with a crop agency of 2.0. Some able DSLRs use full-frame sensors, according to the admeasurement of a anatomy of 35 mm film. Many altered agreement are acclimated in business and anecdotic these sensor formats, including the following:

Full-frame agenda SLR format, with sensor ambit about according to those of 35 mm blur (36 × 24 mm)

Canon's APS-H architecture for accelerated pro-level DSLRs (crop agency 1.3)

Leica's M8 and M8.2 sensor (crop agency 1.33).

APS-C refers to a ambit of similarly-sized formats, including

Nikon DX format, Pentax, Konica Minolta/Sony α, Fuji (crop agency 1.5)

Canon entry-level DSLR formats (crop agency 1.6)

Foveon X3 architecture acclimated in Sigma SD-series DSLRs (crop agency 1.7)

Four Thirds System architecture (crop agency 2.0)

Production costs for a abounding anatomy sensor can beat twenty times the costs of an APS-C sensor. Only about thirty full-frame sensors can be produced on an 8 inches (20 cm) silicon dent that would fit 112 APS-C sensors, and there is a cogent abridgement in crop due to the ample breadth for contaminants per component. Additionally, the abounding anatomy sensor requires three abstracted exposures during the photolithography stage, which requires abstracted masks and affection ascendancy steps. The APS-H admeasurement was called aback it is the better that can be beheld with a distinct affectation to advice ascendancy assembly costs and administer yields.1

Due to the ever-changing constraints of semiconductor artifact and processing, and because camera manufacturers generally antecedent sensors from third-party foundries, it is accepted for sensor ambit to alter hardly aural the aforementioned nominal format. For example, the Nikon D3 and D700 cameras' nominally full-frame sensors absolutely admeasurement 36 × 23.9 mm, hardly abate than a anatomy of 35 mm film. As addition example, the Pentax K200D's sensor (made by Sony) measures 23.5 × 15.7 mm, while the ancillary K20D's sensor (made by Samsung) measures 23.4 × 15.6 mm.

Most DSLR angel sensor formats almost the 3:2 aspect arrangement of 35 mm film. Again, the Four Thirds System is a notable exception, with an aspect arrangement of 4:3 as apparent in best bunched agenda cameras (see below).

Medium-format DSLR

The best accepted sensor admeasurement for medium-format agenda cameras is about 48 × 36 mm (1.9 × 1.4 in)citation needed, due to the boundless use of Kodak's 22-megapixel KAF-22000 and 39-megapixel KAF-390002 CCDs in that format. Phase one offers the P65+ agenda aback with Dalsa's 53.9 × 40.4 mm (2.12 × 1.59 in) 16-bit sensor absolute 60.5 megapixels3 and Leica offers an "S-System" DSLR with a 45 × 30 mm (1.8 × 1.2 in) sensor absolute 37-megapixels.4 In 2010, Pentax appear the 40MP 645D average architecture DSLR with a 44 × 33 mm (1.7 × 1.3 in) sensor.

Compact digital camera formats

The sensor sizes of abounding bunched agenda cameras are bidding in agreement of the non-standardized "inch" system, as about 1.5 times the breadth of the askew of the sensor. This goes aback to the way angel sizes of aboriginal video cameras were bidding in agreement of the alfresco bore of the bottle envelope of the video camera tube. David Pogue of the New York Times states that "the absolute sensor admeasurement is abundant abate than what the camera companies broadcast — about one-third smaller." For example, a camera announcement a 1/2.7" sensor does not accept a sensor with a askew of 0.37"; instead, the askew is afterpiece to 0.26".[6][7] Instead of "formats", these sensor sizes are generally alleged types, as in "1/2-inch-type CCD." Best bunched angel sensors accept an aspect arrangement of 4:3. This matches the aspect arrangement of the accepted VGA, SVGA, and XGA affectation resolutions, acceptance images to be displayed on best computer monitors after cropping.

As of December 2010, best bunched agenda cameras use 1/2.5" or 1/2.3" admeasurement sensors. Digicams with the 1/2.5" sensor admeasurement accommodate the Panasonic Lumix DMC-FZ18, Canon PowerShot A570 IS, Canon SD870 IS Agenda ELPH (IXUS 860 IS), Sony Cyber-shot DSC-W80, Canon Powershot S5is, Sony Cyber-shot DSC-H7, Canon PowerShot TX1, Sony Cyber-shot DSC-H9, and Casio Exilim EX-V7. 1/2.3"-sensor digicams accommodate the Kodak Easyshare M530, the Canon Powershot SX130 IS, the Fuji Finepix Z70, and the Nikon Coolpix S8100.

Many megazoom digicams use 1/2.33" sensors, including the Pentax Optio X90, the Olympus SP600uz, and the Kodak Z981. Additionally, some Sony digicams use a 1/2.4" sensor size, including the Sony Cyber-shot HX5V.

Compact cameras application sensors of about alert the breadth accommodate Fujifilm Finepix s6000fd/ s6500fd (1/1.7"), Fuji Finepix F50fd (1/1.6") and Finepix F31fd (1/1.7"), Canon PowerShot G12 (1/1.7")and Powershot SD950 IS and S90/S95(1/1.7"), Ricoh Caplio GX100 (1/1.75"), Nikon Coolpix P5000 (1/1.8") and Coolpix P7000 (1/1.7"), and some Panasonic Lumix cameras like the DMC-LX3 and LX5(1/1.63").

Conversely, the sensors of camera phones are abate than those of archetypal bunched cameras, acceptance greater miniaturization of the electrical and optical components. Sensor sizes of about 1/6" are accepted in camera phones, as able-bodied as in webcams and agenda camcorders. The contempo Nokia N8 has a sensor admeasurement of 1/1.83", however, accepting the better sensor in a buzz currently.

Table of sensor sizes

Inch-based sensor formats are not standardized. Originally, they were the alien diameters of angel tubes acclimated in the 1950s. Exact ambit may vary, but those listed are typical.

Bridge cameras and the gap in sensor sizes

There is a ample gap in sensor admeasurement amid agenda bunched cameras and either DSLR or arch cameras. Few cameras accept sensors beyond than 1/1.7" (43 mm2), the more good admeasurement frequently begin in bunched cameras, and abate than 4/3" (225 mm2), the aboriginal admeasurement begin in DSLRs.

From 2005 through 2009, there was accretion absorption in arch cameras, medium-sized cameras with beyond sensors and more good lenses than bunched agenda cameras, and after the mirror systems or bulkiness of DSLR cameras.

Manufacturers accept gradually responded to this interest. Epson, an aboriginal entrant, alien the R-D1, a agenda rangefinder application the Leica M mount. Other companies accept alien agnate cameras that focus electronically rather than manually, such as the Olympus PEN E-P1 which is agnate to a bunched agenda camera with two notable differences; a sensor of the admeasurement begin in agenda SLRs (in this case Four Thirds) and changeable lenses.