Originally posted by Penview52 One thing to consider is the manual white balance of the first two photos because they were taken simultaneously unlike the other photos of different time and dates.
When you fully pressed the shutter button and displayed on Lcd the captured image, did you press any arrow on the controller to specify the light measuring area? or press the green button to select the center as your choice. If you did not specify the measuring area, the resulting photo takes the kelvin temperature settings.
I just noticed that manual white balance was used instead of auto white balance. Usually with Pentax DSLR cameras of recent years, the auto white balance turns out quite well. The exception might be some artificial lighting situations. But I still think the improper use of metering was the main problem with exposure in these examples.
The matrix metering takes all sections of the frame into evaluation. But even it can be fooled by extreme lighting situations, hence the reason for having the SCENE modes on amateur-oriented camera models. Pentax offers more advanced features and build quality on such cameras than other brands do, so even advanced photographers purchase them, sometimes as secondary models to their main camera. I own the K-S2 as my smallest, lightest model, and enjoy the fact that it also has a very good complement of advanced amenities. I have never used any of the SCENE modes, but they are a good convenience for others who might use the camera, and also a selling point. There are SCENE settings for numerous situations, like snow scenes, for example. With a lot of bright snow, the camera's meter, even matrix, will sense "too much bright white" and will back down exposure, resulting in gray snow and dark people. When you know what to expect, you don't need the SCENE mode to compensate. If you want to continue using any of the auto-exposure modes- "P", Av, Tv, etc. you simply use the exposure comp button to increase exposure by around 1-1/2 stop or so and keep shooting. If using Manual mode, and spot meter, you choose a mid-tone area to set your exposure and go from there.