Today I went to a local lab to have a Lightjet print made from one of my better 4x5 stills. It was originally a 4000 dpi drum scan I had reduced to 3000 dpi. I plan to print it at 20x24. When I got there they told me they wanted the file the actual print size and 200 dpi. I could not believe 200 dpi. That works out to scanning a 4x5 at 1000 dpi at film for a 20x24. Also they were going to charge me an extra $18 to resize it. At any rate 200 dpi works out to a little less than 4lp/mm roughly in print, but my neg is carrying a lot more detail at that level, like 6-8 lp/mm or very very detailed. I asked why only 200 dpi, and they said thats where it works best. I dont buy it. Above 200 dpi probably slows their workflow too much. I looked at one of their 20x24 4x5 prints on a wall and it was okay, but it did not snap with detail. I looked at it with a loupe and you could see what looked like scan lines too, but only under magnification. Actually it looked like a digital print that had been enlarged almost too much. It was just not crisp, but that could have been the camera too. Hmmmm I then called a local photo nut friend and mentioned the 200 dpi thing to him and he said it did not sound right, that all the Lightjet printshops he knew of wanted 300 dpi final size files. I also mentioned to him that 200 dpi at 20"x24" was equal to a 1000 dpi scan equiv. I told him that if I was only scanning 4x5's at 1000 dpi I might as well be shooting MF. Sounds to me like I am throwing away detail. He laughed and said your right. I think for a 4' x 5' print ould be fine but....... What do you guys think I understand to can print at R8 (200 dpi roughly), R12 (300) or R16.