While the Quattro isn’t always resolving as much luminance detail as the k3 which is to be expected since it is almost 5mp less in image size, it is capturing much more detail overall due to the extra color information and its ability to change hues/contrast much quicker thanks to the lack of Bayer filter giving it a much higher per pixel detail.
I feel this gives the images more depth, even when re-sized for web the images seem to have more life to them than what I get from Bayers.
One of the other benefits this has is the ability to display more detail on screen at any one time which can be handy for example when viewing maps/plans and as such this was the my goto camera when digitizing some architectural plans for a local company who commented on how sharp and detailed the images where, while I can’t share them I can share a crop from books I was also digitizing.
Sadly as much as I tried I wasn’t able to get a hold of a K3II to test the Pixel shift mode which allows the Pentax to capture full color at every pixel by using multiple frames but since this mode would only work on static subjects and possibly only with continuous lighting (depends if Pentax implemented a delay for strobes) so the real world use would be more limiting, still it would have been nice to see how it compares.
I did how ever have the pleasure of shooting a few frames with the Pentax 645z with the 90mm f2.8 macro lens which currently costs just over £10,500 for the combo at a local camera store.
I took this chance to see how the little £800 Sigma compares so I placed my Pentax k3 on the ground and took a few quick frames.
*note* laying on the floor playing around with things during a camera shop open day gets you some funny looks!
Shot with the Pentax 645z and 90mm f2.8 SR Macro
Left 645z with 90mm f2.8 Macro – Right Sigma Dp3 Quattro upscaled to 50mp.
Now I know the 645z can do many things the Sigma can’t but at low iso shooting I’m pretty impressed with this little thing especially since you could buy all four Sigma Quattro’s for the price of the Pentax lens alone!