Is 12MP REALLY enough ?

Started Mar 6, 2009 | Discussions thread
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Big Ga
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Is 12MP REALLY enough ?
Mar 6, 2009

Actually, I'm one of those who thinks it probably is ..... for now ... for most people (but this will change).

BUT

I'm reading posts here where some are using the '300dpi @ A4 = about 10MP, therefore you don't need any more' argument.

The problem with this, is that your conventional 10MP sensor is made up of your RGGB bayer array, with four sensels effectively needed to capture one RGB pixel. Yes there is some fancy interpolation going on to upscale the res back up, but a nice simple analogy is to consider the AA filter as something that blurs the one 'real' RGB pixel over the four sensels to avoid aliasing and moire. In a worst case scenario, your 10MP sensor is actually only capable of resolving something like a sharp 2.5MP image.

Bottom line is if you did print an A4 image taken with your 10MP conventional sensor, and compare it from one taken with a similarly designed 40MP camera (which was downsampled), or a Foveon type with a 10/30MP type sensor, you WOULD see a difference in the final print. Whether its enough to really matter at A4 is another question, but realise that 12MP is not somehow the 'ultimate' resolution for this size printing and going further won't give any benefit.
Just something to ponder over.

G.

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