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Thread: Screen Cezanne Users Unite

  1. #861
    Peter De Smidt's Avatar
    Join Date
    Jan 2001
    Fond du Lac, WI, USA

    Re: Screen Cezanne Users Unite

    Someone mentioned making a new calibration strip earlier in this thread. I have not done that.

    This is an X/Y scanner. All that means is that you can place the film anywhere on the bed, and the lens/sensor will move to the proper position. This is different than, say, consumer scanners, where the sensor/lens are fixed, and the best resolution is down the middle of the platen, such as the Agfa T2500. Creo (and later Kodak) had a patent on stitching. The Cezanne can actually stitch lineart passes, but not regular film scans.

    If you look at the Seybold report on scanners, they achieved about 5700 spi with a Cezanne. I also have tested mine with an Edmund's chrome on glass high resolution target, and my results are the same. The sensor limits resolution in the front to back direction, but it is the linear motion system which does so in the left to right direction.

    Regarding profiling, I scan 99% bw. I did make profiles using Wolf Faust's IT8 targets and Lprof many years ago. They helped.

    For scanning color negative film, this is what I'd do: I'd scan as a positive in 16 bit per channel mode. I'd move all of the listings from the Finish column. Left click on the them and drag them to the left column. When that's done, you will have a unmanipulated data as I know how to get from a Cezanne.
    For bw: scan as a positive in 16 bit per channel mode. Go into manual fine adjustment. Go to the sharping tab. Turn it off. Go back to the retouch color tab. Set the mins to 0 and the maxes to 255. Click on the enlarge tone curve button. Use the curve to invert the data. This is a pain, but don't worry, you'll only have to do this once, ever. You should have a readout that can take and store 8 readings (or so). I put a target on the film base, the lowest shadow, the brightest highlight and the most important tone, such as the face in a portrait. I adjust the HD and SD numbers to give me what I want, making sure not to clip data on either end, erring on the side of low contrast. Good? Name the file aaa_BW_Invert. Scan. Next time you want to scan bw, set the resolution and then load the setup from the aaa_BW_invert scan. Using aaa will mean it's the top setup in the list. All of your setups will be saved. Sharpening will be off, the invert curve with be there. Set your sample points, adjust your sd and hd values, and scan. Because the scanner is x/y, you can load the bed up with scans, setting all of them up at once, and go someplace and have a snack, or a nap, or a walk......

    Dotfinder isn't useful in my experience for regular film.

    I don't know about the Atto card. Screen lists the Adaptec card in their notes, and that's what I use.
    "Why can't we all just get along?" President Dale, Mars Attacks

  2. #862

    Join Date
    Feb 2015

    Re: Screen Cezanne Users Unite

    This has a diagram of the x/y movement

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