Response to Acros in Microphen - and why are ISO ratings inflated?

> 1) I rate both HP5+ and Tri-X at EI 200 developed in my standard soup (HC-110 diluted 1:43). That's what gives me 0.1 above b+f at zone 1. With Microphen I can push the EI to around 400.

OK, next question: how have you calibrated your light meters and how are you exposing your test strips? Or iow, why does our mileage vary?

I've calibrated all my reflected-light meters to sunny f16 reading a Wallace Expo-Disc and all incident-light meters to sunny f16 in incident mode.

Taking HP5+ as an example, (I don't use HC-110) I get usually EI 400 or 320 in "normal" developers with the film developed to the usual "N" specs and the only major deviations for N development have been EI 160 for D-23 1:3 and EI 640 for both Microphen and DD-X.

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