I've had my K5 for many years now and never really understood the composition adjustment/sensor shift feature until now. I cannot believe I've ignored this brilliant little Pentax feature, especially given my interest in wide angle landscape shooting.
There are a few threads and even a YouTube video or two that explain the use of the feature, but honestly, I never concluded it to be very useful after seeing them.
I just shot a BEFORE/AFTER image in the backyard that pretty much shows the value of shifting the sensor to control converging verticals. Hopefully I can get around to a few other favorite places with my DA15 to really put this tool to work!
First, here's a pic (sorry for the boring content and bad light, ;p )
I used the Sigma 10-20 at 11mm to frame the building. As usual, perspective distortion is evident and becomes more pronounced as straight lines get further from the center of the frame.
Next, I used composition adjustment to shift the sensor up to the max (+24) position and re-composed to match the original composition. This resulted in a very notable correction in converging verticals. [I have even overdone the correction, but you get the idea]
Again, this is nothing new if you have stayed current, but I'm a little slow and want to share a real world example.
cheers!
mikeSF