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Sensor size and Dynamic range... smaller has less?
Based on what I have read here on these forums it seems generally true that as far as dynamic range is concerned:.

Small senors 1/2.5" get less DR than 1/1.7" sensors, which get less DR than 4/3 format sensors, which get less DR than APS-sized sensors, which get less DR than Full Frame sensors..

True?.

Thanks..

Peter F...

Comments (9)

Peter,.

What you say is generally true but there is a lot of variation depending on sensor and software details..

See Roger Clark's excellent discussion (in particular, figure 4 & table 2):http://clarkvision.com/...etail/digital.sensor.performance.summary/index.html..

Comment #1

A bit too technical for me, or at least for my level of interest. But thanks for the link and I have bookmarked the site and will go back and peruse. A quick glance did point out that I should add pixel count the the general list of what effects DR. IOW, more pixels reduce (generally) DR..

Peter F...

Comment #2

PeterNMIF wrote: ... A quick glance did point out that I should add.

Pixel count the the general list of what effects DR. IOW, morepixels reduce (generally) DR..

Right, and it is just another side of the same coin since the more pixels there are for a given sized sensor, the smaller each pixel can be..

In general small pixel implies small DR...

Comment #3

Dave Martin wrote:.

In general small pixel implies small DR..

While I'm not saying that's wrong because I honestly have no knowledge on the factors of DR, but wouldn't more pixels give you a larger DR albeit more noise as well?.

Say you have 2x2 square of pixels and another square of the same size but pixel layout of 3x3. You would think the increase in photosites would more accurately catch the range of light in that one region and therefore give you better light variations/details than the 2x2 layout..

Eh, what do I know? I just like to be able to capture the scene as I see it...

Comment #4

Em0314 wrote:.

Dave Martin wrote:.

In general small pixel implies small DR..

While I'm not saying that's wrong because I honestly have noknowledge on the factors of DR, but wouldn't more pixels give you alarger DR albeit more noise as well?.

DR's top limit depends mostly on light intensity, while it's bottom is fixed by noise. Like you said, small pixel implies increased noise, therefore less DR...

Comment #5

PeterNMIF wrote:.

A bit too technical for me, or at least for my level of interest.But thanks for the link and I have bookmarked the site and will goback and peruse. A quick glance did point out that I should addpixel count the the general list of what effects DR. IOW, morepixels reduce (generally) DR..

Yes. Here is a different way to explain why....

The ratio of noise-electrons to photo-electrons is the signal-to-noise ratio (SNR), not necessarily the DR. But the SNR is always related to the DR..

The SNR is higher with large photosites. To get large photosites, make the sensor area large and the number of photosites small. All the other factors are less important than the photosite area!.

Having a small number of photosites is not currently popular. It WOULD be popular if everybody understood that the greatest IQ is achieved with a MODERATE number of photosites and big sensors..

Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/..

Comment #6

Camera manufacturers understand the difference but their marketing departments rate the importance low on the list..

Cheers..

Comment #7

Yep. You should see what a Nikon D40 can turn out with 6m large sensors...

Comment #8

Greg Nut wrote:.

Yep. You should see what a Nikon D40 can turn out with 6m largesensors..

My rule is, "Buy the biggest piece of Silicon you can afford and one that is divided into as few pieces as you can put up with.".

Most buyers violate both parts...and then wonder why the pix have poor IQ..

Another wrinkle is that when a camera has a small piece of Silicon that is divided into too many pieces, the evil geniuses that thunk up that try to fix the IQ with in-camera NR...which often makes it look like a "watercolor" print..

Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/..

Comment #9

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