Originally posted by Leumas Well I was about to ask why go with a q-s1 over the q7 .....but I think that answers it. All around better it seems
I just took a couple of pictures to illustrate the differences between both cameras. Nothing fancy, just a view at infinity shot in bad weather with the 01 Prime lens on the Q7 and Q-S1 cameras.To minimize the risk of discrepancies, I used the same 01 lens on both cameras. Both were set to manual exposure mode, f/4.5 aperture, 100 ISO, daylight white balance and RAW + large JPEG mode.
I carefully measured the exposure with my Gossen Luna-Pro: 1/125s for F/4.5 and 100 ISO. The first surprise was that the Q-S1 gave me a correctly exposed picture at f/4.5 and 1/125s but the corresponding Q7 picture was way too dark:
Q-S1 (straight out of camera JPEG at 1/125s, F/4.5 and 100 ISO)
Q7 (straight out of camera JPEG at 1/125s, F/4.5 and 100 ISO)
[EDIT: as per KWB' s post, it appears that I had the ND filter activated in my Q7, therefore it is perfectly normal for the image from this camera to exhibit a 2 stop difference with the one from the Q-S1.] In order to get a correctly exposed picture with the Q7, I had to use 1/40s at F/4.5 and 100 ISO, that's a difference of almost 2 stops compared to the Q-S1! It means that when you shoot in low light at 800 ISO on the Q-S1, you have to crank up the sensitivity to 2500 ISO on the Q7 to get an equivalent shutter/diaphragm couple.
[EDIT: there is no difference in exposure between the Q7 and the Q-S1.]
Here are the pictures, with the exposure on the Q7 adapted in order to get the same density on the JPEG (you can click on the pictures to inspect them full size):
Q-S1 (straight out of camera JPEG at 1/125s, F/4.5 and 100 ISO)
Q7 (straight out of camera JPEG at 1/40s, F/4.5 and 100 ISO)
100% details of both JPEG OOC pictures (Q-S1 on the left, Q7 on the right):
Here are the same pictures but processed with Adobe Camera Raw from the raw files (minimal processing, low sharpening):
Q-S1 (raw file processed with Adobe Camera Raw)
Q7 (raw file processed with Adobe Camera Raw)
100% details of both JPEG from raw pictures (Q-S1 on the left, Q7 on the right):
I find the Q-S1 images distinctively sharper at base ISO both for processed RAW and out-of-camera JPEG, especially when looking at low contrast fine details, like tree foliage at infinity. If you download the original JPEGs processed with ACR and give them a bit of sharpening, the difference becomes even more apparent.
Cheers!
Abbazz