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Old Feb 18, 2010, 4:32 PM   #1
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Default Sensor ratings -- Whad'dat?

I was reading from www.photographyblog.com/ that "DxO Labs have released their sensor-based data obtained from a pre-production Canon EOS 550D digital SLR camera. The Canon EOS 550D / Digital Rebel T2i, which was only announced a week ago, got a sensor rating of 65.6 on a scale of 1 to 100, which is less than some APS-C competitors (Nikon D5000/D90/D300/D300s, Pentax K10D, Samsung GX20, Sony A380/A550/A700) have received in the past, but it has to be mentioned that all of these competitors offer lower resolution and most of them are prosumer rather than entry-level models."

I can't seem to find the "sensor rating" for the Pentax K-7. Anyone know what it is or if its even important???

By the way, FWIW, "Online Photographer" notes that "Pentax has the best made-for-digital compact primes, which are an afterthought to the other four manufacturers." Boy, that sure sounds great.

All the best.

Ned
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Old Feb 18, 2010, 4:43 PM   #2
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Hmmm... I don't have a clue but, it'll be interesting to find out.
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Old Feb 18, 2010, 5:47 PM   #3
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Quote:
Originally Posted by Eetu View Post
I can't seem to find the "sensor rating" for the Pentax K-7.
You'll see it ranked at number 56 right this minute. Here's their current list of cameras they've tested (ranked from best to worst):

http://www.dxomark.com/index.php/eng...amera-rankings

For more about what it means, see this page:

http://www.dxomark.com/index.php/eng...xOMark-metrics

But, I'd take some of those measurements with a "grain of salt", as their tests can be influenced by other things (for example, noise reduction at the raw level).
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Old Feb 18, 2010, 5:56 PM   #4
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i think its a good quick reference, but again boiling down image quality to a single number, or a few numbers is somewhat offputting.

its better to take a look at your own photographic needs, then choose a whole camera based on those needs, there is more to a good photo then just the sensor.

for example if i am entry-level user who desires the best high-iso performance for general photography, i would probably choose the k-x from pentax. but, if my needs shift to sports, again as an entry-level buyer, i would go with the t1i/t2i for their better and more proven AF and better selection of sports lenses.
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Old Feb 18, 2010, 6:00 PM   #5
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Many thanks, indeed for the info.

Hards80, do I detect that you have both a Pentax and Canon?

All the best.

Ned
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Old Feb 18, 2010, 6:02 PM   #6
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Hards has a canon no pentax,

I shot both the 500D and pentax K-x and soon a epl-1
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Old Feb 18, 2010, 6:31 PM   #7
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yea, i have shot canon for going on 15 years now. currently have a 50d.

but, i stay abreast with all major manufacturers to help give the most unbiased opinions i can.
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Old Feb 18, 2010, 10:33 PM   #8
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I think I gave up putting too much store into sensor figures and charts a long time ago - I tend to look at sample pictures (which aren't always an accurate indicator either) and go by ergonomics mostly. A long time ago there was a person who hung out around here (until he got banned) who delights with telling everyone who'll listen just how horrible Pentax cameras are and his charts always show them as being worse than any other camera. At least DxO is far more objective than this individual is.

Not everyone has the same tastes, either. For instance, Pentax has traditionally had more detail/resolution and more noise in their higher ISO pictures than some of their competition (including ones using the same sensor). So someone looking strictly at noise would say the camera lags behind the one with less noise. On the other hand, the person looking at lines and detail would prefer it, wanting to decide for themselves how much detail they want to sacrifice to noise reduction.

So when you look at any charts, you need to understand what they are trying to tell you, then decide if that's anything important to you.
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Old Feb 19, 2010, 12:34 AM   #9
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Quote:
Originally Posted by JimC View Post
You'll see it at number 56 right this minute. Here's their current list of cameras they've tested (ranked from best to worst):

http://www.dxomark.com/index.php/eng...amera-rankings

For more about what it means, see this page:

http://www.dxomark.com/index.php/eng...xOMark-metrics

But, I'd take some of those measurements with a "grain of salt", as their tests can be influenced by other things (for example, noise reduction at the raw level).

Many thanks, Jim.

Really appreciate the help.

Ned
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Old Feb 19, 2010, 12:37 AM   #10
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Quote:
Originally Posted by Hards80 View Post
yea, i have shot canon for going on 15 years now. currently have a 50d.

but, i stay abreast with all major manufacturers to help give the most unbiased opinions i can.
Well, I must say, yours and some others have been very even-steven, unbiased and helpful... which I thinks makes for a really good forum.

Many thanks.

Ned
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