GADGET REVIEWS Just another GADGET NEWS

In what’s a sure sign that the megapixel race in cameras is out of control, Canon has announced that it has developed a 120-megapixel image sensor.

That’s 13,280 x 9,184 pixels packed into an area that’s less than 29 millimeters or 1.4 inches. It’s the highest level of resolution in a sensor of its size, says Canon.

Most cameras today used either a CCD (charge-coupled device) sensor or a CMOS (complementary metal-oxide-semiconductor) sensor. Canon’s latest innovation is for a CMOS sensor.

The 120-megapixel sensor is about 7.5 times larger and offers a 2.4-fold improvement in resolution over Canon’s highest comparable commercial sensor. Canon’s highest-resolution commercial CMOS sensor is currently the EOS-1Ds Mark III and EOS 5D Mark II digital SLR cameras. That sensor incorporates approximately 21.1 million pixels.

Cramming more pixels into a sensor is not necessarily indicative of the quality of the photos. Many consumers think more megapixels in a camera means better photos. But sometimes packing more light-sensitive pixels on a tiny sensor can result in greater noise in the photos. Cameras also require strong processing capabilities to take all the data from the sensors and translate into a beautiful picture.

With most CMOS sensors, camera makers use parallel processing to read data at high pixel counts. But that has to be balanced against problems such as signal delays and deviations in timing, all of which can affect image quality.

Canon has modified the method to control the readout circuit timing to get about 9.5 frames per second. This can support continuous shooting of ultra-high-resolution images, says Canon.

The newly developed CMOS sensor also includes full HD video (1,920 x 1,080 pixels) output capability.

For now, the 120-megapixel sensor is a proof-of-concept. It’s an engineering flight of fancy but it shows camera makers are trying to find ways to pack in greater capability into increasingly smaller sensors.

Photo: CMOS sensor/Canon

Source:wired.com

Posted under Gadget Reviews

The lens is the most important part of your camera. It controls everything about the light that hits the sensor short of the length of the shutter speed. It is much better to put a great lens on a cheap camera than the other way around, something which goes frustratingly unheeded: just check a few photo forums to see people sticking crappy kit lenses onto Nikon D700s and Canon 5D MkIIs.

That’s not to say that Samyang’s range of lenses for Samsung’s mirrorless NX-series are bad. Without testing we won’t know for sure, but experience says that own-brand lenses are best, followed by those from top-tier third party makers like Sigma.

Three lenses are being ported to the Samsung mount. An 8mm 3.5, a 14mm 2.8 and an 85mm 1.4. Of these, the 8mm would seem to be the most interesting. It will come in at around 12mm (35mm equivalent) on the NX APS-C sensor, and usually the main point with a fisheye is impact rather than absolute quality. The price has not yet been announced but the lens can be had for as little as $350 in other mounts.

The 85mm, on the other hand, is a flat-out portrait lens and goes for around $400. In this case, quality needs to be high. If Samyang manages this, then the 1.4 lens will be an absolute bargain.

Tempted? Think twice. There is one huge drawback when using the lenses on a modern camera: No autofocus. This will probably be fine for the fisheye, but try that with the insanely shallow depth-of-field that an 85mm 1.4 will give you and you’ll learn a thing or two about manual focussing and just how wobbly your hands really are.

Product page [Samyang via BJP]

Source:wired.com

Posted under Gadget Reviews