film - Does reciprocity failure (Schwarzschild effect) exist in digital photography?

In analog photography (film) there was an effect called "Schwartschild effect", or Reciprocity failure when making long exposures (usually more than few seconds).

Some film brands created compensation tables for their films; for instance, you would need to double the time after 4 seconds, meaning if the meter says f/5.6 at 5 seconds you have to expose 10 seconds at the same aperture to get the film correctly exposed.

1. 
   

   Does that effect exist in digital photography?

   
   


2. 
   

   If yes - does the exposure metering automatically compensate for it? (meaning with the above example the exposure time will be automatically adjusted to 10 seconds).

   
   

Answer

Essentially, no - digital sensors are pretty much linear in that if you double the number of photons hitting it, you get double the output. They're obviously not perfectly linear, but they're close enough you don't need to worry about it.