Posts Tagged ‘sensors’

One Advantage of the Small Sensors in Cell Phone Cameras

Cell phone cameras have pretty poor image quality when compared with point-and-shoot cameras due to their small sensors, but one advantage they have over compact cameras is a naturally deep depth of field. That was particularly useful for this YouTube user in capturing some sharp video of his new motorcycle — something that would have been much more difficult using a standard point-and-shoot.

(via Fstoppers)

Full-Frame Sensors in Consumer Cameras

Full Frame Sensors in Consumer Cameras sensor

As technology improves, features that were once limited to expensive professional models often become available to the masses, but will this ever be true for full-frame sensors? Nikon’s Senior VP David Lee was recently asked this question in an interview with TWICE, and here’s what he said:

I think that there are definitely two different approaches here. What we’re seeing is that sensor performance continues to improve, but obviously there’s really a need for bulk because with a full-size sensor there’s a real low-light performance benefit, high speed performance, framing rates, and so on and so forth. So, I think you’ll definitely continue to see the higher-end pro consumer continue to have that large format. It’s definitely needed in the D3 and D700. You’ll see that technology continue to improve and grow, but the DX sensor form factor is also important. The compactness of the D3100 and D5100 is very popular. I don’t think one approach will ever overtake the other because of the overall image capabilities and the light performance capabilities.

Seems like he either misunderstood the question, or decided to beat around the bush. It’s an interesting question though — will any of the big manufacturers shake up the industry by being the first to put a full-frame sensor in a consumer-level camera? The sensors have already jumped from pro-level cameras to prosumer-level ones starting in 2005 with the Canon 5D, so it seems like the next logical step will be the consumer level. A sub-$1000 full-frame camera. Now that’s a thought.

How Much Does Size Matter In Image Sensors (via 1001 Noisy Cameras)


Image credit: What’s That? (63) by jurvetson

Does Bringing a Camera onto an Airplane Damage Its Sensor?

Kodak uploaded a video to YouTube recently thats been causing quite a bit of controversy. It’s a talk by Rob Hummel at Cine Gear Expo 2011 in which he states that bringing your digital camera onto an airplane will damage its sensor and cause dead pixels (it’s about 8min into the video). The reasoning is that at altitudes of 20,000ft and higher, you would need 125ft of concrete to shield yourself from the gamma rays, which induce voltages in the sensors and fry the photo sites. He also claims that manufacturers only transport cameras by sea, and that they all keep quiet about this because they fear a class action lawsuit.

The comments on the YouTube video and the dpreview forums are filled with people who believe that this is simply an attempt by Kodak to spread fear, uncertainty and doubt (FUD) over digital cameras in an effort to lure more people to using film. So, which is it? Fact or FUD?

(via dpreview and Photo Rumors)

How Canon DSLR Cameras Work

Ever wonder what actually happens between the time you press the shutter button on a DSLR and when the image shows up on the LCD screen? Canon made these two videos explaining how their DSLR cameras work and how they use CMOS sensors to turn photons into photos. You’ll probably find this pretty interesting if you’ve never learned about CMOS sensors before. For a more in-depth lesson, check out the sensor tutorial over on Cambridge in Colour.

Nikon Patents an Interchangeable Sensor System for EVIL Cameras

Nikon Patents an Interchangeable Sensor System for EVIL Cameras interchange

In the present day world of photography, “mainstream” digital cameras aren’t nearly as modular as desktop computers since components can’t easily be swapped in and out of the camera body. The future might look quite different, and Nikon is taking a step in that direction with a recent patent filing for interchangeable sensors on EVIL cameras. In addition to choosing a particular lens depending on the desired photo, photographers would be able to choose different sensors as well.
Read more…

Sony Pellicle Mirror DSLR Sensors Overheat, Limiting Video

Sony Pellicle Mirror DSLR Sensors Overheat, Limiting Video sonya55overheat

Sony has issued an “important notice” that shooting HD video for semi-long periods of time with the A33 and A55 may cause the sensor to overheat, shutting off the camera. How long the camera lasts depends on ambient temperature and image stabilization is enabled. If it’s 30° C (~86° F) the A55 can only go 6 minutes with IS turned on.
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Canon Develops One CMOS Sensor to Rule Them All

Canon Develops One CMOS Sensor to Rule Them All canonlargecmos

A week ago Canon announced the development of a APS-H CMOS sensor that delivers a staggering 120 megapixels. Not content with ruling the megapixel race, they’ve just announced a physically gigantic sensor — the largest CMOS sensor in the world.

In the photo above, the sensor is shown next to a standard 35mm full frame sensor. The thing measures 202 x 205 mm (or 7.95 x 8.07 inches), or 40 times the size of current sensors, and is extremely sensitive. It can supposedly record 60fps video under moonlight. Potential applications of this kind of sensor include capturing the night sky and documenting nocturnal animal behavior, though (like the 120MP sensor) you probably shouldn’t expect this to hit the consumer market anytime in the near or semi-distant future.

What Laser Light Can Do to Your Precious DSLR Sensor

We all know pointing your DSLR directly at the sun for extended periods of time isn’t too healthy for your sensor, but what about laser lights like the ones used at concerts? Turns out those can be even more lethal for your camera, even with very brief exposures.

Here are two videos shot with DSLR cameras that show a laser briefly passing over the camera and damaging the sensor permanently. Both were shot with Canon 5D Mark II cameras:

See the white line that appears immediately after the laser sweeps across?
Read more…

Get Ready for 14-Megapixel Camera Phones

Get Ready for 14 Megapixel Camera Phones omnivisionlogoCamera phones may soon offer more megapixels than some DSLR cameras. Imaging company OmniVision announced today that they have developed a 14.6-megapixel image sensor that will fit in cell phones. These sensors are capable of both high-resolution still photography and 1080p high-definition video recording.

Get Ready for 14 Megapixel Camera Phones 14mpcellsensors

I wonder how long it will be before camera phone imaging quality rivals the quality of the best point-and-shoot cameras.

(via Photography Bay)

Fathers of Digital Photography win Nobel Prize in Physics

Fathers of Digital Photography win Nobel Prize in Physics boyleandsmithThe technology behind DSLRs, video cameras, web cams, and even astrophotography and medical imaging would not be where it is today without the combined ingenuity of Willard S. Boyle and George E. Smith, who were awarded the Nobel Prize in Physics today in Stockholm.

In 1969, Boyle and Smith invented the first digital imaging sensor, the charge-coupled device, or the CCD sensor. The two scientists developed CCD technology from 1921 Nobel Prize predecessor Albert Einstein’s theory of the photoelectric effect, through which light is converted into electrons. In short, CCD sensors capture the electron signals in the form of image points, or pixels.

The invention of the CCD sensor ushered in the digital age of photography, facilitating distribution of photographs and broadening the use of digital imaging into the fields of medicine and astronomy.

Currently, CCD sensors are still employed in a variety of cameras such as the Hasselblad digital H series (which costs as much as a high-end economy car), the entry-level Nikon D40, and the average phone camera and webcam, including the Apple iSight.

Fathers of Digital Photography win Nobel Prize in Physics 3023346434 67a6a39626

CCD sensors, which are generally recognized as more mature since they were developed earlier, tend to be preferred when high sensitivity, accurate color, and more pixels are needed. Thus, CCD sensors are also used in the Hubble Space Telescope and medical imaging. Also, smaller cameras, like webcams and compact digital cameras, have smaller sensors, so the CCD sensor can compensate for the reduced sensor area, which usually results in lower light sensitivity and higher noise.

Most modern DSLRs use complimentary metal-oxide semiconductor sensors, or CMOS — you’ll usually see this listed next to most camera specs. CMOS sensors have lineage from CCD sensors, capturing light in the same way.

CMOS sensors took over the camera industry over the last decade, mostly because they are cheaper to manufacture, as they’re made like a computer microchip. Additionally, they require less energy to capture an image, and thus require a smaller battery, which is more friendly and practical for the average consumer. Most modern CMOS sensors are also have a built-in image processor, unlike CCD sensors, which is solely devoted to capturing light, and has a separate unit to process image data.

CMOS and CCD sensors have a complementary relationship; neither is considered particularly superior to the other, especially as technology continues to improve for both.

And as technology advances, so does mankind. The Nobel Prize for inventing the CCD celebrates not only the innovation of Boyle and Smith, but the far-reaching impact of photography on humanity through technology, communication, aesthetics, and science.

For more information about the Nobel Prize winners, visit the Nobel Prize site.


Image Credit: Boyle and Smith mugshots by the National Academy of Engineering, CCD by GEEZETH