Originally posted by mikesbike I wonder if the camera will work fine with quick-shift with other lenses.?
That is an excellent question that I hadn't thought about!
I tested my DA* 300mm f/4 on the K-1 and Quick Shift focus DOES work. It shows the cropped framelines, but it does not show the "MF" icon as described above when you are adjusting focus manually while still holding down the shutter button. After adjusting focus manually, further depressing the shutter button on the K-1 does release the shutter.
So my new theory is that Quick Shift is not supported on the K-1 for the much newer HD 24-70 lens but is supported with older lenses in the same period of the K-1's manufacture era.
Again, the best test would be if we have another K-1 user (Mark 1, not Mark 2) who could test this lens for the Quick Shift ability.