Originally posted by yeatzee Well, im not sure how using liveview would make my images some how softer :ugh:
How else could i accurately get the EXACT same focus for two different camera's than focusing one and using liveview on the other to mimick its focus? And again, I assure you the K-7's are in focus.
You haven't described in detail how you are using LV to assist you with the focus, but I am assuming (rightly or wrongly) from what I read that you are using focus confirm of some sort which the camera indicates using the AF system. That would not really mimic a screen focus aid. Here are just some of the variables inherent in using the camera AF system in manual mode:
1. It is a well documented phenomenon that the AF points indicated in the viewfinder are not nearly as precise as the point of focus determined from the focus screen, especially using focus aids. I don't know how much better or worse the focus in LV is in this regard than the viewfinder dot system.
2. The focus assist in viewfinder systems often produces slightly inaccurate results because the indicator will indicate "in focus" through a minute but noticeable turn on the focus ring. When the subject is viewed through the focus aids, I have noticed that the confirm light will remain on even though the split image has gone past the optimum point of focus.
3. AF systems vary in accuracy.
I don't know whether your images are in different focus compared to one another. However, I don't think you can "assure" that they are both in exactly the same focus precisely enough for this comparison either, using two different focus techniques.
I have never tried to compare the sensors of two cameras. For lenses, I take multiple photos, refocusing each time, and pick the best. I have been amazed at how different one of five exposures of the same shot taken on a tripod can be from the others when viewed at high magnification ratios, especially if the subject is fairly close.
Without a well calibrated focus screen in each camera, used exactly the same way multiple times, I would not feel I had a true test of the sensor, and not some other system or technique.