There's been a fair bit of action amongst 5D/1D owners recently in buying up\nold wide angle lenses with very generous field of coverage. And for good\nreason too. The don't vignette and distort like the Canon variations do.\n\nWell, I've been photographing painted art (digitising paintings) for some\nrelatively unknown Aussie artists recently in the lead up to making canvas,\nreproduction prints. This exposes camera equipment designed for 3D subjects\nto all it's weak points. The lenses available from Canon are just one. The\nideal lens is a flat field lens. I paid a heap for a 50/2 Summicron lens and\ntook it back for a refund when it didn't live up to it's reputation. Don't\nget me wrong, the lens is fine on 3D subjects, just not so good when the\nfield is flat.\n\nThen I had a local micro engineer machine me up an adaptor for my 5D which\nhad a screw thread to take an enlarging lens. I missed on the depth of the\nfirst one but by using a bit of math I managed to get the second one pretty\nmuch spot on. I used an adapted focusing rail from my old Mamiya days for\ncritical focus.\n\nThe first few frames I took using a Nikor 50mm enlarging lens were better\nthan anything I'd used in the "normal" lenses but lacked some colour\ndefinition. Then I used a 75mm Rodenstock I've had since 1971 which I\noriginally used for enlarging 6x7cm negatives. When I die I want this one in\nmy coffin!\n\nIt is just about as good as it gets now. The alternative was to spend k\non a scanning back outfit but with a little ingenuity, some very high\nquality parts from the past and patience, I'm very pleased with the results.\n[URL]http://www.photosbydouglas.com/art-repro-on-canvas.htm[/URL] if you'd like to see\nthem.