Quote Originally Posted by BrianShaw View Post
Intellectually and emotionally I agree. But lightmeters and apertures aren't spec'd the same as a mechanical shutter, so the comparison is interesting but not quite the same. The spec's are what the spec's are. Sure, there is always someone who can improve upon most mechanical specs that but it generally involves a lot more effort/cost.

The potential for additive error in the total exposure chain is huge, though. I cetainly agree with that point!
It most certainly is the same. A 30% error in a shutter, an aperture, or or a lightmeter will have precisely the same effect on exposure.

What if your development timer ticked off a minute in 42 seconds? That's a 30% error.