This is a sensor the same size as the 35mm film negative, measuring 36 x 24mm. This is the most desirable camera type for most enthusiasts and pros, but full frame cameras are bigger, heavier and more expensive. Most DSLRs and mirrorless cameras use smaller APS-C sensors. Cameras with full frame sensors give shallower depth of […]
Sigma’s Foveon sensor uses a unique layered design to capture blue, green and red light on separate layers. It mimics the multi-layer construction of colour film. This gets round the limitation of conventional single-layer bayer sensors, where each photosite can only capture red, green or blue light. This means that neighbouring pixels must be used to interpolate the full […]
This is a relatively uncommon sensor size mid-way between APS-C and full frame. Canon used it for its EOS-1D high-speed pro sports/press photography DSLRs before these were merged with the introduction of the full frame EOS-1D X. APS-H sensors measure approximately 30 x 20mm, or a couple of millimetres less. Canon has since announced the […]
This is the most common sensor size in cameras designed for enthusiasts and it’s found in consumer DSLRs, mirrorless compact system cameras and some high-end compacts. As you can see from this diagram, it’s around half the size of a full-frame sensor and much larger than other sensor types (there is an APS-H sensor size […]
A process that reduces the storage space taken up by photo or video image files. It comes in two type: ‘lossless’ and ‘lossy’ compression. Lossless compression retains all the image data but does not produce the biggest savings. Lossy compression produces much smaller files, but some data is lost in the process – though this […]
Sensor cleaning can be an automatic process carried out by the camera to shake any dust particles from the sensor, but sometimes manual (user) cleaning is needed. This requires a special sensor brush (‘dry’ cleaning) or a swab and sensor cleaning fluid (‘wet’ cleaning). Manual cleaning needs a degree of skill and confidence.
A fixed focal length (‘prime’) lens designed to be as slim as possible so that the camera/lens combination is lighter, more compact and more unobtrusive. Their only real concession compared to a regular prime lens is maximum aperture – typically f/2.8 for a pancake lens.
A special effect which converts the whole image into black and white except for one specific colour range. One the the most common examples is a black and white image with a bright red subject – the girl in the red coat in the film ’Schindler’s List’, for example.
A means of correcting converging verticals in architectural shots and other perspective issues. You can get ‘perspective control’ lenses which use complex lens adjustments to fix the problem optically, or you can use software with perspective correction tools.
A brand of memory card that includes Wi-Fi capability so that you can transfer photos wirelessly to a smartphone, tablet or computer. More and more cameras are coming out with Wi-Fi built in now, though, so these provide the same functionality as Eye-Fi cards.
You own the copyright in any photo you take, though if you photograph a model or an important building, you may not have the right to use your photos commercially without their permission (or ‘release’). Some cameras can embed a copyright message automatically in each photo’s metadata.