The slide film's "medium" dynamic range only works if you're projecting
the image. Put it on paper and the advantage is gone and you're still
faced with the original disadvantage... that the scene dynamic range is
considerably less. I believe Norman Koren's comments here about why
professionals shot slide film and it has little to do with dynamic
range. <http://www.normankoren.com/zonesystem.html> In the "Slides,
negatives, and digital" section he says: "Back in the days when film
ruled, most professional professionals worked with color slides instead
of negatives because clients demanded them. Why? WYSIWYG! What you saw
was what you got; it was easy to judge the quality of slides, and when
they were good, they were really beautiful. Projected slides can
reproduce a brightness range of 1000:1 (a logarithmic density range of
3); the best you can do with a print is about 100:1. It's difficult to
judge anything from a negative; prints from camera shops or drug stores
seldom do justice to the information on negatives."
I love my digital work since, with my computer, it gives me that WYSIWYG
effect of my old Kodachrome while adding many more advantages in
post-processing and reproduction.
Chuck Norcutt
On 6/7/2012 6:36 AM, Dawid Loubser wrote:
> Here's the interesting thing: Positive Slide film has *much* greater
> dynamic range, as a medium, than what any negative film has ever had.
> Apparently, it supports an object contrast of around 1:4096 (12 stops
> dynamic range), vs negative film that maxes out at around 1:256 (8
> stops).
>
> Negative film, however, compresses a much wider brightness range into
> this small dynamic range, which is why it's so easy to scan on even
> cheap scanners and capture the whole brightness range, whereas slide
> film needs top-notch scanners to capture the range in the media -
> especially subtle tones in dark areas.
>
> See: http://en.wikipedia.org/wiki/High_dynamic_range_imaging#Scanning_film
>
> I've always had a soft spot for slide film, loved shooting Provia in
> my RB67 when I could still easily get it developed around here, e.g.:
> http://fc03.deviantart.net/fs48/f/2009/190/3/e/One_magnolia_at_a_time_by_philosomatographer.jpg
> (Provia 100, Mamiya RB67, Sekor-C 140mm Macro @ f/8)
>
> I've always liked the gentle highlight roll-off of slide film. Though
> the range of intensity in the photographed scene that is captured may
> be less, I do like the "analogue" non-abrupt-clipping behaviour
>
> Similarly, this night scene encompassed a *really* wide dynamic range,
> but I love how the slide film handles the highlights (e.g. the amps
> inside the shop).
>
> http://philosomatographer.deviantart.com/art/Recursion-of-misplaced-values-128842422
> (Provia 100, Mamiya RB67, Sekor-C 65mm @ f/4.5, handheld, 1/8s)
>
> There is a reason why pros always shot slide film before digital :-)
> I know I went off-topic, and of course, Chuck, you are talking about
> "scene" dynamic range vs "medium: dynamic range, but I thought I'd
> throw in a little discussion on the topic.
>
> regards,
> Dawid
>
>
> On 05 Jun 2012, at 7:25 PM, Chuck Norcutt wrote:
>
>> A great photo but I don't understand this comment at all: "The
>> extended
>> dynamic range of the Phase One reminds me of when I started using
>> transparency film." He implies that transparency film has extended
>> dynamic range. In fact, transparency film is inferior to negative
>> film
>> for dynamic range.
>>
>> Chuck Norcutt
>>
>>
>> On 6/5/2012 11:28 AM, Brian Swale wrote:
>>> I should have given the URL for his image. Here is one version:
>>>
>>> http://tinyurl.com/dxv8q9n
>>>
>>> Almost certainly available only to face-ache users.
>>>
>>> As usual for him, taken well off the beaten track. He's been in
>>> this rugged
>>> landscape for about the last week. Certainly works hard at getting
>>> his shots.
>>>
>>> Brian Swale.
>> --
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