Should I have to meter my ligth at 400 then process or set my ligth meter to 1600 asa for the shooting? I use Iflord Pq Uni developer is 1+9 and Ilford Rapid fixer 1+4. Film is 120.My average darkoom teperature is around 21.3°C =70.34°F .Chemicals are just new! Set up with a chair and a white background and a small ligth from top metered at 400 asa 1/15 shutter speed is f 2.8 and at 1600 asa 1/60 shutter f2.8 with a Minolta autometer III F. If I want to set my hassy at f 5.6 and 1/125 for the shot then push it to 1600 that means I have to shoot 2 t-stops lower. Or just set up my f at 5.6 and 125 shutter and then push it to 1600 in dev.