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Thread: Alpa TC Digitar 35mm and P45+ vs :-)

  1. #1
    Subscriber gogopix's Avatar
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    Alpa TC Digitar 35mm and P45+ vs :-)

    As I am going thru shots, it strikes me a benefit of high res is getting images when you can't 'be there'

    We were in Le Puy en Velay and Passed an interesing site. When in Puy, I broke out the Alpa TC and the wide Schneider Digitar for some panoramas to capture the untreresing sweep of the valey esp the volcano cores that were built on over the ages.
    Last edited by gogopix; 25th January 2015 at 17:23.

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    Subscriber gogopix's Avatar
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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    In the distance is the subject site.

    Here's a 100% view of the center from the AlpaTC-SK35-P45+

    (I also show an edge shot for those interested in the SK performance)
    Last edited by gogopix; 25th January 2015 at 17:23.

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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    NOW, I just happened to have a small guy with a telephoto...
    Last edited by gogopix; 25th January 2015 at 17:23.

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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    and of course a 100% brings you even closer...
    Last edited by gogopix; 25th January 2015 at 17:23.

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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    So, who WAS that 'masked camera" that brought us so close? and the lens?

    no EXIF peaking

    also, NO SHARPENING ON ANY OF THESE

    the TC P45+ files had yes the default 34% of C!

    the little guy, none

    fun what you can do with this stuff..
    :-)

    regards
    Victor

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    Subscriber robsteve's Avatar
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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    Leica M8 and 90mm APO.

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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    DMR and 105-280

    Woody

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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    It is beautiful scenery anyway you look at it.

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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    Actually was the M8 and 135 (most recent)

    Set at infinity I found the 135 was pretty much in focus at f8-11 from a few 100 meters out, and the foreground was NOT that OOF.

    There is an interesting article abount not using hyperfocal distance in such cases; it would put the far items OOF a bit.

    Victor

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    Senior Member Lars's Avatar
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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    To me the Alpa 100% crops look seriously oversharpened... maybe because I'm used to look at DSLR output with AA filter and film scans, but it sure looks like the Alpa unit does its own agressive sharpening. Especially visible at the horizon.
    Monochrome: http://mochro.com

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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    It could also just be the JPG compression for the web...
    Carsten - Website

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    Subscriber gogopix's Avatar
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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    There's no alpa doing anything-its a block of aluminum.

    The schneiders are very sharp lenses and these are 7000+x5000+ images downsized in genuine fractals.

    The jpg compression is from 12 = 10MB down to 5 o6 to get under 270KB

    I see most images looking like they are sharpened mostly because the compression causes local posterizing that appears like sharpening. It isn't oversharpened images have a different look.

    This is the issue with backs of such high resolution you don't need ANY sharpening but jpgs cant keep up with the detail, much less going also from 16 down to 8 bit and from Prophoto RGB to sRGB. The latter also increase posterizing when the color is out of gamut for sRGB and it has to pick one of the few colors near on the border .

    Processing here is

    C1 tiff-prophoto16bit>PS>GF>8bit>sRGB>jpg>saved file That's it.

    hardly a way to judge, but ok for relative comparisons or just to have some fun with "reach" that is, using pixels or telephoto.

    Victor

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    Senior Member Lars's Avatar
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    Re: Alpa TC Digitar 35mm and P45+ vs :-)

    Must be your jpeg compressor then - there are clear sharpening artefacts for example along the edge of the tower. Same thing with the M8 crop, though to a lesser degree. Of course C1's raw conversion is a black box, "no sharpening" doesn't necessarily mean no increase of local contrast.
    Monochrome: http://mochro.com

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