Hi I have a Durst lab 1000 to enable me to print multi format negatives and plates. I recently completed doing contact sheets for over 170 negatives and used my trusty focomat 1c to do this to enable me to select the negatives i wanted to enlarge as they are negatives which range from 40 to 75 years old. So yetsrday went to use the durst on a plate negative i think about 2 1/4 by ?? and used a 75mm nikor lens. Tried 5.6, 4, 8 but the test strips were coming out really poor - too dark. Tonight i tried using my analyser pro to measure the exposure time but all that kept saying was LO. Help any suggestions?