Originally posted by FHPhotographer to a novice it seems counterintutive: the camera light meter isn't linked to the settings
Of course it is. But in manual mode, the meter doesn't *do* anything except tell you how under- or over- exposed it thinks the picture will be with the current settings. It won't actually try to fix the problem for you until you hit the AE-L button (which is the K100D equivalent of the Green button in this context).
BTW, despite our preconceived notion that the avocado is dark and the banana light, in the grand scheme of things, they are not actually all that different - both are considerably darker than the background, and the lightest areas on the avocado are actually no darker than the darkest areas on the banana. So depending on *exactly* where your spot meter is pointed, it is not actually unreasonable that the meter would suggest the same exposure in both cases.
Quote: I suppose a good term would be that the lightmeter (in Manual) is uncoupled from the image?
If you had looked at the display to the right side of the viewfinder, you'd have noticed it telling you whether it thought the exposure was too bright (positive numbers), too dark (negative numbers), or right on (0.0). At least, for lens that support auto-exposure. With manual exposure lenses (ones with an aperture ring not set to the "A" position), you only see that display while holding the DOF preview button.