Super-saturated poppy
My Pentax is a good camera (good enough so that when I crunched my original one past the point where I could restore it to life I went out and bought a new one instead of upgrading to a nice mirrorless camera) but the image sensor is really sensitive to red, to the point where a highly saturated red (a poppy petal, for example, with the sun shining through it) will, without heroic efforts, completely wash out the reds and end up with a photo that looks as if someone poured fluorescent red poster paint onto the image.
Possibly a red filter would do the trick?