Hi I just got a Sekonic L-358 (my first handheld meter) and will be shooting with my Mamiya 7/80mm, probably Ektar 100, and Fuji 400H, and maybe some slide film as well.

I am wondering, if the meter is accurately calibrated, should I be compensating the readings at all? Or should I set my EV to what is read on the L-358?

Reason I ask is I just read some things online about the Sekonics (and other meters) being calibrated for 12.5% grey, whereas a grey card is 18%... Has me a bit confused.

I understand that there are creative decisions involved in setting the EV but as a baseline, I want to make sure I am starting off correctly.

I will be shooting a variety of outdoor scenes.