Can anyone guide me to a study which indicates that high MP results in poorer IQ? PLS.
I cannot guide you to such a study and I am shure you will never find such a study because:
If the per pixel quality stays the same, more pixels give always better IQ until other factors like lens IQ are limiting.
Lower pixel counts help to reduce processing time and filesize which may be valuable for some purposes but nothing less/more.
I am physicist and it was never bad to measure values as precise as possible - it was bad to measure with less than required precision! If you don't need the precision you can report rounded measurement values - if a light bulb has a power consumption of 60.22412 Watts or 60 Watts essentially is not important for a bulb user, but perhaps for a lamp design researcher who optimizes the production process.
Hmmmm. Then why the resentment to better IQ? That is what I am trying to understand.
I think may people are saying they would like the improvement in 'IQ' with files that are not as large, because they already have more than enough resolution for a highly portable 35mm type camera.
+ I feel that the reality of much higher MP on FF chip ( or APS for that matter) only manifests itself in 'higher IQ' when the photographer is viewing his images at 50 - 100% on his computer screen. Although this may give the photographer immense satisfaction it is not actually producing a better picture for display to anyone else.
I forgotten to refer to TECHNICAL IQ in my lines.
Sporgon, your argument (underlined) is IMO correct. I myself are satisfied with my 40D in terms of technical IQ .... FOR WHAT I DO: Photographing things and landscapes because I like to do it and viewing the best pictures for pleasure as 30x40cm (12x16 inch) prints or via a XGA-Beamer (1024 x 768 Pixels, 0,8 MPix (!!!)). A photograph with valuable content and expression works always on 12x16 inch or e.g. a 2 MPix beamer.
Furthermore I see no dramatical technical IQ gain with the 18MPix sensor of the 600D.
But I would take a 48 MP full frame sensor for one reason: Coulors of e.g. monochromatic light sources would be much cleaner if you downscale it to 12 MPix to have 1 red, 2 green and 1 blue subpixel for one final image pixel. Bayer demosaicing gives strong artefacts for e.g. LED tail lights and red sunsets. Therefore I miss a sRAW mode in my 600D which gives me 10 MPix or so.
sanj: "Then why the resentment to better IQ?"
Alternatively I could say "24 MPix for APS-C is bullshit, 10 MPix is enough". BECAUSE I have only 10 MPix at hand and no money to buy a better resolving camera. I think is more or less a psychologial resentment.