Of course, shooting with legacy adapted lenses means aperture priority or manual. That's just par for the course when one shoots with Pentax cameras and lenses from as far back as sixty plus years. What these DA to NEX adapter (hopefully) allows me to do is to manually open and close the diaphragm on the current Pentax DA lenses without aperture rings. If the adapter I just purchased can do that without being to fiddly, I would be happy enough.
Follow-up: There seems to be quite a few brands of these type of adapter after all. I searched for DA to NEX adapter and quite a few of them popped up in eBay. The same search in Amazon.ca led to this: https://www.amazon.ca/gp/product/B078HJ5JS9/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Although the better priced adapters are available on eBay I chose Amazon for their much quicker turn around time. I just hope the adapter works as it should.
Hello...in my case the banding is easily apparent due to the white background - I don't see it in other scenes that I shot immediately beforehand, but don't think the bands are due to lighting irregularity (they appear more aligned with shutter movement). Could it be some conflict between the lighting and the shutter speed?