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Click here to go straight to instructions I’ve been teaching alternative processes for many years, and while some students have an appetite for techy stuff and maths, most are artists who just want to make beautiful prints. To many, calculating correct exposure times and calibrating digital negatives is a painful process to push through in order to get to the good stuff.   Fig. 1: Stouffer T3110 and T2115 Step wedges Calculating the correct exposure time can be as simple as e