Sekonic L558

[NikoSperi]

Baxter,
That's my method too. The reading I get with the Lee #25 red varies quite a bit according to the light... I've settled on 5x or -2.5 EV. Easy, quick, but quite transient. What did you measure that filter to be, if you have it?

[Baxter Bradford]

Niko
Sorry I can't give a value for the 25, I only have the cheap gel 23A filter which measures at -1.7EV.

Being B+W it isn't nearly so critical as for Transparency, so hope that your average figure works. Alternatively, suggest using two/three annotated readings for lighting situations which you can recognise.