Sabaki said:What effects noise at higher ISO Is it purely processor related or does the pixel size of an APS-C body contribute as well?
processor has nothing to do with that (unless you just care about jpg output straight from the camera but that has nothing to do with what RAW files and actual performance the camera can deliver)
it depends upon sensor size and technology, larger sensors have more surface area over which to collect light (although you may need to stop down the aperture to maintain DOF and give it back though, depending) and more efficient sensors collect more of what light hits and better sensors mix in less noise of various types to the light signal collected and more color-blind filter arrays let in more light and thus mean higher luminance SNR but at the cost of lower chroma SNR and less ability to distinguish certain subtle shades from one another
now that they have gapless microlenses and such you don't lose much by going to smaller photosites, any individual photosite is noisier if it is smaller but all together it's reasonably close to the same, withing reason.
Upvote
0