http://www.firstcall-photographic.c...rip-printer-print-projection-calculator-scale Is it worth to get one for the exposures tests? Or can I make one in a transparent acetate sheet? I getting a bit of trouble in doing the traditional way, the print always come ups to dark. I cover almost all the paper, expose for 2 seconds, then slide the covering a bit and exp. 4s, then 8 then 12 or sixteen, etc. the final exposure is made with out any cover (right or wrong?) and that small last part should correspond to the 2 seconds, since the first one will always got light, corresponding to the longest exposure time and being the darkest. Yes? Or I am completely east of eden?