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Thread: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

  1. #71
    A.K.A Lucky Bloke ;-)
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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    I don't know if Silverfast changed the source for the USAF targets but the copy I received seems fine (sharp). The only defect was in the last element of the last group (7,6) so is good all the way to 10'000 dpi. Ideally should be mounted slanted, around 5 degrees.

    Here's a pic I took using the target while testing the Howtek lens.

    Click image for larger version. 

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  2. #72

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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    I took a photomicrograph (200x) of group 6 and 7 of the latest batch of Silverfast targets:


  3. #73
    A.K.A Lucky Bloke ;-)
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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    It seems a little worse. Any samples with the scanner?

  4. #74

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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    Plenty. Please find one of the samples below.

    Heidelberg Tango
    New Color
    Aperture -5
    Resolution (Factor x Resolution) 11kdpi
    Scan as negative
    No sharpening
    No post treatment



    How to read the sample? Click here.

  5. #75
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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    If I am reading this correctly the resolution is not even 4000 dpi. But I don't think the issue here is the target. I would double-check the focus using pieces of 1 mil overlays.

    In any case, if the scanner smallest aperture is 10 microns then that's as good as you gonna' get.

  6. #76

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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    Looking forward to seeing the results (and scans) of others ;-)

  7. #77
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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    Sure. Here's one from a Howtek scanner using Silverfast's target. 8K dpi native. No adjustments of any kind, of course.

    Click image for larger version. 

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    Same image interpolated to 11K dpi, for comparison purpose only.

    Click image for larger version. 

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  8. #78
    Pali K Pali K's Avatar
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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    I bought a Tango which arrived earlier this week. I haven't played with it much to know if this is best I can resolve but posting a Tango vs Scanmate 11000 resolution comparison as a FYI. Both were dry mounted. Will repost if I am able to resolve more resolution from the Tango.



    Both scanned at 11000 DPI.

    Pali

  9. #79
    Pali K Pali K's Avatar
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    Re: Drum Scanners: Upgrade from Howtek 4500 to Heidelberg Tango?

    Quote Originally Posted by sdzsdz View Post
    Hi! Iīm glad if I can help. But it seems that I have to make the workflow a bit clearer.

    1. Assign an it8 profile to positive and negative scans in the profile manager:

    DSC_1743 by Sebastian Dziuba, auf Flickr

    2. use LAB and 16 bit TIFF in the Scan-Setup, hit the negative tab in the scanning setup first and then disable any adjustments in the colour assistant by unchecking this small box that is named "Colour Assistant". Use 0 and 5 for Highlights and Shadows:

    DSC_1744 by Sebastian Dziuba, auf Flickr

    DSC_1745 by Sebastian Dziuba, auf Flickr

    (You can save these adjusments to a preset on the left upper corner of the program. I made myself a preset for negatives and positives taht are nearly the same despite of the one with the negative button hit, the other with the positive button hit.)

    Now you will get a raw (positive, no inversion) scan of your BW or colournegative without any visible sharpening. For positive scans I use exactly the same workflow BUT I hit the positive button in the scanning setup. But that maybe obsolete because the scans are now the same. I never tried. But I get no sharpening issue in positive scans either so I donīt think of it any more. Maybe the most important part is to completely disable the color assistant.

    3. Important: Convert to RGB and Prophoto colour space in Photoshop before you do anything. And now you can use different ways to convert your negatives in PS. I use the above described for colour negatives and nearly the same for BW. It works best for me. In my oppinion the files are excellent and have a phantastic tonal range and accuracy to work with them.

    Hope this helps,

    Best regards,

    Sebastian
    Hi Sebastian,

    I am trying to follow these steps with my own IT8 profile and am unable to get positive scans in the negative mode. I am using Newcolor 2.5.7 on Mac and even after turning off the Color Assistant (including [A] icon) I get inverted previews and scans. Would it be possible for you to share your profile that I can try this with?

    Regards,

    Pali

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