Quote Originally Posted by E. von Hoegh View Post
Is 30% error acceptable in a lightmeter? No. Aperture calibration? No. Then why on shutter speeds?
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!