Thank you for your answers. I'm working with an aptus 22, and yes, I'll be hoping to make use of the 47mm's full shifting potential...
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Have you used the Custom Gain Adjuster with the Aptus 22?
You may not have noticed (or they might not exist), but there can be some subtle color casts with the Aptus 22 using the wide Digitar lenses. When you get the lens, test the combo with the back in vertical orientation and shift up 20mm. Shoot the white plexi disc that comes with the back or shoot a white uniform surface and make a light gray exposure. There are three things to look for...
1. Color casts in the form of Magenta/Green shifts. The Custom Gain Adjuster (CGA) would remove these casts 100%.
2. A possible center fold line running horizontally through the image at exactly the center of the image running all the way from side to side. The CGA will fix this also.
3. A Red/Cyan shift running from the top to the bottom of the image. This is caused by the light from the lens going through the IR filter in front of the sensor at extreme angles. The CGA will fix this also.
It is good to test these issues so you don't discover them on your first job. Both Rainer with his eMotion 22 and I with my Aptus 22 experienced very subtle shifts in color. Although these color casts are much more prevalent with the 33MP chips, it is still better for you to be safe than sorry.
If you find that you don't have any of these issues, it may be more convenient to use a center filter on the 47 digitar than to shoot the white plexi reference shots and run the CGA for every shot just to remove the light fall-off. If you do have any color shifts, then the CGA does a great job with removing lens fall-off as well. It can even be set anywhere from 1%-100% removal of the fall-off. I most often set it at 50%.
