Pixel density, size and noise at higher iso

[kimosnaps]

The manufacturers can say that this or that camera sensor has x #/meg but I have read that if the pixel density on the sensor is too high, the number becomes meaningless because of the noise introduction factor....Here is the question: How do we determine pixel density on any sensor and how do we determine the absolute minimal pixel size that is needed for professional results....I have read somewhere that the pixel size should be no less than 5 angstroms....How does one arrive at the initial numbers so that I can do the math by myself?

[candleman]

what?? sounds like a ridiculous waste of time to me.
what practical application are you actually going to put this to use for?
unless theres some College project that you're working on..

if you want a professional level camera... any full frame DSLR released in the last 5 years will do.. theres your answer

1. just look at the sample images and reviews on DpReview (and elsewhere) and make up your own mind regarding what you need in terms of noise output......

2. buy a Pro level camera off the shelf and you will have what you want..



i dont see the reasoning behind this question.

[OsmosisStudios]

Originally Posted by kimosnaps

How do we determine pixel density on any sensor and how do we determine the absolute minimal pixel size that is needed for professional results

This is absolutely meaningless. Pixel density is in no way related to "professional results". Stop reading DPReview forums.

[jdepould]

With good glass and good light, pixel density is completely irrelevant.

Slap a 70-200/2.8 on a D40x and give me half an hour around sunset, good to go.

Edit: Having said that, I wouldn't recommend a D40x for a high school gym.

[inkista]

If you don't have the time to google all the "megapixel myth" stuff , then I'd suggest reading just this one:

The Real Megapixel Myth

Resolution still counts, and 100% crop is something a lot of folks don't really understand.