Light Meter settings for STH OLPF

[Aris_Gavriilidis]

Hello everyone, I've read quite a few threads on the differences between the LLO and STH OLPFs, however there's still something I don't understand. Since the STH is slower by about a stop, if I set the camera at 800 for example, would I have to set my light meter to 400 to get proper exposure? Or does the sensor compensate for the light loss when the STH OLPF is installed so that the camera and meter settings match?

 

[Phil Holland]

Hello everyone, I've read quite a few threads on the differences between the LLO and STH OLPFs, however there's still something I don't understand. Since the STH is slower by about a stop, if I set the camera at 800 for example, would I have to set my light meter to 400 to get proper exposure? Or does the sensor compensate for the light loss when the STH OLPF is installed so that the camera and meter settings match?

The underlying OLPF Calibration (when the camera or you chooses what OLPF is in there) automatically maps the values as you'd expect. Meaning ISO 800 on any of the OLPF is the "same" especially in regards to how a light meter works revolving around the concept of Middle Gray.