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Question about image resolution

post #1 of 8
Thread Starter 
Lets say I have two cameras of the exact same optical quality...

-The first camera shoots at 100 megapixels
-The second camera shoots at 20 megapixels

Question is, if I took a picture of the exact same object with both cameras, and viewed each picture on a 100ppi monitor without any cropping, would the 100 megapixel camera contain "more" noticeable detail than the 20 megapixel camera?

I know if I crop the higher res picture then obviously at a certain point you would see that the 20megapixel camera loses quality, but when viewing at a low ppi would any difference in quality be noticeable?
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post #2 of 8
I don't know for sure, but by 100 MP the lens becomes the limiting factor.
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post #3 of 8
Quote:
Originally Posted by Eggs and bacon View Post

I don't know for sure, but by 100 MP the lens becomes the limiting factor.

same optical quality i think can be assumed to mean that they are properly matched to each camera to give acceptable results. if you are shooting a 100MP camera then you would have the appropriate glass on it tongue.gif

i dont think you will see any significant different in quality on a computer screen. the area where you will definitely see the differences are in high quality large prints.
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post #4 of 8
Thread Starter 
Quote:
Originally Posted by Conspiracy View Post

same optical quality i think can be assumed to mean that they are properly matched to each camera to give acceptable results. if you are shooting a 100MP camera then you would have the appropriate glass on it tongue.gif

i dont think you will see any significant different in quality on a computer screen. the area where you will definitely see the differences are in high quality large prints.

Well I don't have a 100mp camera was just an example, if it did have a lens appropriate, not technically better though. What I was basically asking is if you are looking at content which was originally taken at a much higher quality than the screen or print you are looking at, would there be a difference. A 20mp and a 100mp camera would both be sufficient for example a 100dpi print, or even a 600dpi print for that matter, as long as you stay in a relatively small print, but would there be any difference if the print is at 600dpi without any crop or zoom if the original print is capable of much larger prints?
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post #5 of 8
It all depends on viewing resolution. Given a source 100MP image and a 20MP image both viewed at 1024x768 you will not notice any difference on today's monitors. Now start zooming in and/or displaying a larger image and you will quickly notice the difference. We view most of our online content at less than the equivalent of 1MP.

Can you tell the difference between the image from a new 5D2 and a original 5D when displayed at web resolution? Not a 5X difference like you were talking about but a demonstration of the principle.
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post #6 of 8
Thread Starter 
Quote:
Originally Posted by silvrr View Post

It all depends on viewing resolution. Given a source 100MP image and a 20MP image both viewed at 1024x768 you will not notice any difference on today's monitors. Now start zooming in and/or displaying a larger image and you will quickly notice the difference. We view most of our online content at less than the equivalent of 1MP.

Can you tell the difference between the image from a new 5D2 and a original 5D when displayed at web resolution? Not a 5X difference like you were talking about but a demonstration of the principle.

If you start cropping then when will you notice the increased quality? Very soon or when the dpi of the print is more than the ppi of the picture.

I just want to clarify that more resolution is actually better, but does not mean you will notice it, and WHEN you will start to notice it is another question. thanks
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post #7 of 8
Quote:
Originally Posted by Arm3nian View Post

If you start cropping then when will you notice the increased quality? Very soon or when the dpi of the print is more than the ppi of the picture.

I just want to clarify that more resolution is actually better, but does not mean you will notice it, and WHEN you will start to notice it is another question. thanks

Can't really answer on prints but on a monitor assuming your not displaying above the resolution of the monitor (usually max 2560x1600) I don't think you will be limited by today's cameras. That is still only 4MP being displayed. Displaying any image larger than your monitors resolution results in some trickery which I don't understand.

One thing to take into account on both the monitor and print though is viewing distance. You can get away with a lot at a large viewing distance. A 30 in monitor on a small desk though is a different story. And in the end it is all very subjective what is acceptable to you might not be acceptable to others.
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post #8 of 8
Optimal print resolution is 300dpi. In theory, a 20mp sensor with the same pixel size as a 100mp sensor would yield a much smaller print that is acceptably sharp at n viewing distance.
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