Ah, I see! I should check the EV levels the next time I meter in these kinds of situations. However, I do know for a fact that I have successfully metered in situations where I have a stacked ND400 + ND8 and I'm metering at 30 sec (maximum on 5Kmk2 Aperture Priority mode) near the maximum aperture of whatever lens I have on there (F2.8~F4), so I believe it can handle a scene with a little less light than what you are describing.
Originally Posted by andrew.roos
So the Gossen LunaPro SBC, I see on the dial here for EVs down to -8... is that how dark the scene could be for this light meter to still meter accurately??
That's pretty amazing....