Originally posted by bladawiec Sorry, maybe really I am wrong. I remember from years ago the information in some review or test that Q7 has no filter or it has filter but with lower strenght (and probably the second option is correct). But as I remember this information was no from documentation but it was author's supposition due to fact that image resolution in Q7 was higher than Q.
I found one mention about AA filter in old article in Techradar:
"In addition to changing the size of the sensor in the Q7, Pentax has changed the filter over it and, following the current vogue, there is no anti-aliasing filter." Link.
If it is true it can be the source of better image resolution (I think here only about resolution) in Q7 as I wrote before. Sensor size mainly can result in the noise level.