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how to find quality of digital sensor

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how to find quality of digital sensor

Postby justME on Sun Jan 04, 2009 6:12 am

i have heard the pixel count of a digital camera is less important than getting a camera with a high quality sensor. is this true and if so - how does one find a the quality rating of such?
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Postby Jne_K on Thu Jan 08, 2009 8:33 am

Hi

Manufacturerers are only just beginning to tout the quality of their chips as selling points as chips reach sutauration levels in terms of MP. Not something currently listed or rated, specifically, but price is always a good indicator of the quality and performance of the sensor used.
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Re: how to find quality of digital sensor

Postby dinesh_sharma on Thu Jul 29, 2010 12:45 am

Hello Friend,
Basically digital camera contains so many features,so its confusing to a lot of new users.pixel is a contraction,Each pixel in the image has a numerical value of between 0 and 255 and is made up of three color channels and if we are talking about sensor it's use sizes in the range of ~1/4" to 2/3",so both are required for good digital camera and photos.
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Re: how to find quality of digital sensor

Postby Jne_K on Thu Jul 29, 2010 3:55 pm

Correct - there is more to it than pixel count and, in fact, jamming more pixels into a small chip can actually work against you.
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Re: how to find quality of digital sensor

Postby Jeff_6731 on Fri Feb 01, 2013 12:49 am

Yes, that's true, beyond a certain point megapixels don't mean much to an image, if you think about a bluray movie, that has a great picture, and the resolution of a frame is 1920x1080 which is only 2 megapixels, and that even looks good blown up on a 60 inch screen, though to be fair it's harder to scrutinize the details of an image when it's constantly moving and when you pause a movie it usually doesn't look as good, especially if there's a lot of compression involved. It's probably good to have at least 5 megapixels for a still camera for most uses, though if you plan on making giant poster sized prints you'll want something with a higher pixel count, but considering it's pretty much impossible to find a camera with less than 12 megapixels that's not a problem to worry about anymore.

The main thing to look for in a sensor is the size of the sensor, everything else being equal a larger sensor will outperform a smaller sensor, though newer generations of sensors are constantly improving so it's possible that the newest small sensor will do better than a larger sensor that's like 5-10 years old in some areas.

Any sensor should be able to do a good job if you have a good light source (like the sun, a 40 watt light bulb on the other hand is not an example of a good light source), it's when the lighting is poor that a better sensor makes a huge difference. To compensate for the lack of light you need to either open the aperture of the lens wider to let more light in, increase the length of time that the sensor records light, or make a sensor more sensitive to the light. Unfortunately there's only so much you can increase the aperture and lenses with an especially wide aperture tend to be pretty expensive, the longer you leave the shutter open recording light, the the more of a problem you'll have with motion blur, and the more sensitive you make a sensor to light, the more the image quality will degrade from problems with image noise. When comparing sensors of the same size the most common comparison is how they handle images when the sensitivity is turned up. The sensitivity of a sensor is indicated on the ISO scale. ISO 100-200 is generally used in bright light, ISO 400-800 is generally used in dimmer light, and ISO 1600-3200 is used in even darker light, some cameras will have the option of increasing the ISO to as much as 204,800, but it won't look pretty. A lot of sites will show how the noise from different cameras set to high ISOs compare side by side.
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Re: how to find quality of digital sensor

Postby iaanhayden on Mon Apr 08, 2013 1:01 am

The value of the pixels is the main distinction in likeness value. A high value 6 megapixel sensor will produce better value photographs than a lesser value 10 megapixel camera. Lens value and camera responsiveness are far more significant. A good 5 or 6 megapixel sensor is more than enough to conceive good value 8x10 prints.Don't get to dangled up on a 1 or 2 megapixel difference.
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Re: how to find quality of digital sensor

Postby Lisa Nita on Wed Mar 26, 2014 11:42 pm

Best Digital camera 18.0 Megapixel CMOS sensorand DIGIC 4 Image Processor. I had been used DSLR camera for a few years. I traveled many places in the world and I have been enjoying the beautiful landscape with this best digital camera. Why you try?
Lisa Nita