Aperture and shutter speed relation break in intense lighting

I found out that the relation doesn't hold anymore if the area is very bright i.e in the beach or desert.

Let say the correct exposure is 1/500 f5.6. Theoritically and equivalent exposure would be 1/250 and f4. But if the latter is sett would result more light going to the camera and result in hazy like shoot or worst, overexpsose picture.

FYI, this is test using Manual mode with center weight metering and the shoot is bracket.

Please advice why is this happening?

You are going the wrong way, you are increasing exposure with both the shutter and aperture, so of course there would be more exposure.

1/500 @ F/5.6 would be 1/250 @ F/8 (not F/4)
F/5.6 @ 1/500 would be F/4 @ 1/1000 (not 1/250)

The two exposures you cite are not equal, one has four times the exposure as the other (2 full stops).

Enjoy! Lon

FlashZebra wrote in post #5787385
You are going the wrong way, you are increasing exposure with both the shutter and aperture, so of course there would be more exposure.

1/500 @ F/5.6 would be 1/250 @ F/8 (not F/4)
F/5.6 @ 1/500 would be F/4 @ 1/1000 (not 1/250)

The two exposures you cite are not equal, one has four times the exposure as the other (2 full stops).

Enjoy! Lon

Thanks for the correction. It should be F/4 @ 1/1000 and not F/4 1/250.
with f/4 @ 1/1000 = f5.6 @ 1/500, at f4 still yield and overexposure

Where did you hear this? It doesn't really make any sense. This concept does hold true for flash lighting, where there is a single intense burst that fires much faster than the shutter's opening, but I don't really see how it is possible for the beach.