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johnclinch

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Posts posted by johnclinch

  1. One answer is to save the raw file as a tiff with no profile at all ( unassigned colour numbers).This is saved and archived

     

    Then apply the scanner profile when you open the file in cs2

     

    You could the say prepare files for screen use (conert to srgb)

     

    print files could be generated from the archive tiff

     

    personally I find I'm fine with srgb for printing so just use srgb

  2. Please note!

     

    I own a fast focusing panasonic fz5. But all this fast focusing snappy shutter response misses the point.

     

    My camera like a F11 has no true viewfinder.

     

    So although shutter response is fast you are working from a screen/evf that has quite a lag from reality. So when an event occurs on the screen, it actually was long enough in the past for you to have no chance of catching it.

     

    So you need a view finder

     

    maybe a canon a610/1620

  3. Slide scanners are calibrated be photographing standard colours (a colour chart)

     

    Therefore when making a profile we know what the colours in the real world are.

     

    Your problem is comparing a photo and a sepetate target

     

    If the target was in the photo it would be alot easier

     

    Are you trieing to achieve an exact reproduction of the photo or the scene in the photo?

     

    If you'r reproducing the photo calibrate to a grey wedge thats a photograph

     

    I have to say as a farly inept slide scanner colour balance is rarely the thing I find hard (90 % of my slides are Ok with a white point set in rgb curves)

  4. Tom's point is that If the step wedge is not a photograph

    it will respond differently

     

    My hunch is that the grey wedge is actually reflecting rhe whole of the spectrum that shines on it. Thus under say sun light it looks neutral.

     

    A grey in the photo may look the same but probably doesn't reflect the whole spectrum. However it does reflect what your eye sees as an equal mixture of red green and blue light.

     

    However the red green and blue detectors in the scanner will not respond in exactly the same way as the detectors in your eyes. For example the wavelenth of peak sensitivity of the red detector in you eye and scanner may not be the same. So perhaps your scanner is more sensitive to the red light from the photo than your eye. Thus the scanner sees as red what you see as grey.

     

    This doesn't happen to the target because it reflects the full spectrum, so the exact features of the detector are less important.

     

    OK I just made all that up, but it was my understanding of the above posts. I teach physics and I'm not really a photohrapher. I'm constantly amazed by everything I read about colour and colour vision

  5. Ok I'd try a few things like:

     

    Have you got "word" or another wordprocessor. You should be able to set a picture on a blank page and get out pritty much whatever you want. This should at least isolate where the problem.

     

    Yes you need a photo editor

     

    "The Gimp" is free, google for it

     

    I like and use "picture window pro" www.dl-c.com to download a 1 month free demo

     

    Tutorials here (and one is included with the programme)

     

    http://www.normankoren.com/makingfineprints.html

  6. My experience

     

    If you use a mini lab you'll learn nothing

     

    I took some birds flying across sunset

     

    It came back white balanced so the sky was grey. Exposed so the blacks were also grey

     

    Shoot slides then you'll know whats going on. Provia 400F is fine if you need speed

  7. I'm not quite sure what you mean

     

    However Xnview does batch resize and is free

     

    Or do you mean have a crop tool that will crop to a specific size and resize to a specific resolution.

     

    I use picture window pro for this but it doesn't do batches (http://www.dl-c.com/ free 1 month trial). I assume that photoshop does this but as I'm not a regular user so I'm not sure.

     

    But to be honest I can't imagine doing a batch crop

  8. My hunch is that anyone who can really print black and white will learn enough PS (or a similar programme like PWP, see the articles here http://www.normankoren.com/makingfineprints.html ) to develop a shot fairly quickly.

     

    I think the main issue is to find a course/ book that teaches you what you want to know. The problem being that so much is a general intro to to digital graphics. My hunch is that you don't need to cut holes in your pictue the same shape arial fonts.

     

    You only really need a few tools to achive what you want

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