In addition to Rainer's remarks and suggestions about the Brumbaer tools:
- set the eMotion's "White Blance" to "Manual" (in the Menu "SETTINGS" of the back)
- as suggested by Rainer, take a shot of a Macbeth Colour chart 24
- shoot "White Reference" files even if not shifting/tilting/swinging: this will increase "dramatically" the colour uniformity: shoot at least one "White Ref" with the plexi in front of the lens (with an exposure time about 2 stops longer) at least for each of your different lens f-stop used, or for each different camera setting (shift/tilt/swing/focus): these can then be applied to other files shot under the same f-stop and camera settings conditions.
- But the fastest and most efficient workflow is when you shoot the "white ref" just before the actual shot and with the same camera/lens settings: that will give you the minimal work (none actually) afterwards.
- as mentioned by Rainer, you can really go "high" to the right side of the histogram with the highlights, until the warning shows up. The Brumbaer dng Converter, depending on the situations, will recover at least more than 1 f-stop, sometimes 2 or even 3. So the red warning in the clouds or other highlights does not harm the details in this area, when exposing like this.
- when doing a "long exposure" I would suggest to "Manually" make a "Black Reference" before the actual shot: go to the "OK/MENU", and there use the arrows in the pull down menu to select "Blackreference" ---> "NEXT IMAGE". This will make sure that residual noise is eliminated.
- don't forget to set the right camera body used in the "SETTINGS" ---> Body"
- Since shooting at high ISOs is not important for you, use ISO 50.
Don't hesitate to ask if you have any other request.
regarding the emotion75 i suggest you use the brumbaer tools to write dng files with it and process them with any dng compatible software.
you should shoot before every shot, where you change the shift amount or the focus, a white reference with some transparent plexi, as you probably will use it also with the other backs.
usually i write these white files in the brumbaer converter with denoise "on" and destitch "on". also you should make a color calibration, which is done fast if you have a 24 field gretag table. use the help file in brumbaer tools to make it, this is very important to get best colors.
be sure to select an app. right color temperature in the pulldown menue of the programm.
you can expose very high till you have the red overexposure warning blinking in clouds e.g. highlights are very good hold if you use brumbaer tools.
the results are very different as if you use the sinar software, it seems as this are two different backs, so i suggest you should not avoid to test the unit with this program from stephan.
you get it here as freeware: