I went outside the house and walked around our village with my d80. ISO at 800 fixed and on shutter/aperture priority with exposure at normal setting. My metering was on spot metering. The sun was blazing so I figured I can get enough light.
I started to have problems with exposures the shutter priority mode tends to have a hard time. I take pictures on the go so checking my metering tends to be unconscious, remember its the d80 so the ISO auto is disabled and I usually prefer it fixed so I cannot rely on the automation much but only on the exposure compensation when needed 2 stops down or up. I shot this on fixed exposures. it failed to expose correctly. Another is the aperture adjustment I think is not working correctly with the Tamron D80 combo. New Nikon bodies I think would be much better.
Here is what happened when I switched to 18mm it kept its aperture at f/6.7 the metering was off and so again I shoot on the go so I do not check that much when I do these types of photography, the lens camera relationship didn’t work. I was expecting the lens to go to aperture f/3.5 at 18mm.
My metering was off but that is part of my style of photography checking your metering is recommended but sometimes that moment has passed when you look at the view finder you lost that shot. I was expecting it to go to f/3.5 but the case is the lens needed to adjust at that metering and so the lens has a lag on switching apertures pre focusing I guess would help to get a better shot and exposure.
Overall it was a good lens to shoot with. Focal lengths at your disposal with a relaxed paced shooting it will fit this lens well. Fast paced action and photography though I recommend faster lenses never mind the fungus I will get it cleaned in the future.