I don't know where this thread will go, but maybe it can be a tool for others to learn. You know, when you are struggling with something and cannot make it work. Then after an agonizing period it hits you: Oh duh!!
If you have the self-defacing guts to admit yours, tell us!
So here was mine this morning: Got the Alpa out with the 150 short barrel to fool around and take some garden flower photos. Since they were in the 5-7 foot range, I had the Leica Disto out for measurements. Disto up against the back of the camera with a little correction factor for the sensor location (+0.02 ft). Nothing was coming out sharp! Everything was off, way off.
Sitting at the computer afterwords I figure out I focused pretty consistently 1 or 2 inches too close. I was really getting upset because on the 150mm at that distance, it is about a 5 degree rotation of the helical. Huge! And I was sure this lens was calibrated before!
Then it hits me: Hmm; about the same thickness as the Alpa 34mm adapter I had installed on THE BACK of the camera. Making my reference point on the back of the camera oh, just about 34mm too short.