Re: [photo-3d] Provia !!

[Mike Kersenbrock <michaelk@xxxxxxxxxxxx>]

"Hans A.J. Middendorp" wrote:
> 
> Yes, Provia RDP II - 100 ASA for Stereo!
> 
> I have used Provia for years and it is _very_ good under tropical
> conditions, i.e. f16-22, 1/200 mid-morning (dry season), but very 'hard'
> contrast, flickering reflections, 'washed out colours' etc.
> 
> Occasionally, I had to switch to Kodak E6 film - Two years ago, the New
> York UV haze in September turned out bearable on Provia (then I ran out of
> film and Provia was not easily found in NY), but simply un-viewable on
> Kodak E6, unless you like magenta a lot. Also last year, I ran out of
> Provia while in Nepal. What happened: Kodak E6 had over-exagerated
> contrast, and everything not just a little greenish, but really green!! ...
> 
> To be sure, all my films rest in my fridge before and after shooting, until
> developing in Holland. Price of a role of Provia is just less than 4 USD
> here in Bangladesh.
> 
> Yes, I did try Sensia 200 as well, but I found it much more grainy compared
> to Provia 100 and not worth the extra f-stop. This seems to be in
> contradiction with the Table posted below, were the RMS value is only about
> 10% different between Provia and Sensia? How should one understand these
> values?

In an article somewhere on the net (when I was investigating RDP III),
I read that one unit in the RMS column meant double the visible
"grainyness".  Not sure if that really is correct in terms of human
perception, but it does perhaps agree with your observation.

I also understand that a film can seem less or more grainy
than the numerical number.  Provia F is said to be even less grainy
than it's low number due to the nature of it's structure (at the
cost of additional resolution it might have had otherwise).

Below is another chart (from http://creekin.net/films.htm) that includes 
Kodak films.  Enjoy...

Mike K.

   slide films    RMS   resolutionº   sharp  latitude  blue  green   red   code
                                                <
Fuji Provia F 100    8     60    140    15     -1/+1    3.5    3.4    3.3  
RDP3
Fuji Velvia 50       9     80    160    25     -1/+1    3.8    3.7    3.4   RVP
Kodachrome 25        9     63    100    26     -1/+1    3.5    3.6    3.8   PKM
Kodachrome 64       10     63    100    16     -1/+1    3.4    3.5    3.7   PKR
Fuji Provia 100     10     60    140    11     -1/+1    3.6    3.4    3.3  
RDP2
Fuji Astia 100      10     55    135    10     -1/+1    3.5    3.4    3.3   RAP
Ektachrome 100s     10     55?   125?   10     -1/+1    3.8    3.6    3.3  
E100S
Ektachrome 100sw    10     55?   125?   10     -1/+1    3.8    3.6    3.3  
E100SW
Agfa RSX 50         10     55    125     8     -1/+1    3.7    3.6    3.4  
RSX2
Agfa CTprecisa100   10     50    130     7     -1/+1    3.4    3.9    3.5   CTp
Agfa RSX 100p       10     50    125     9     -1/+1    3.7    3.6    3.4  
RSX2
Fuji MltiSpeed @200 11     55    135    10     -1/+1    3.2    3.4    3.0   RMS
Ektachrome 100vs    11     50    100     9     -1/+1    3.7    3.5    3.2  
E100VS
Ektachrome 100+     11     50    100     8     -1/+1    3.8    3.5    3.1   EPP
Ektachrome 100      11     50    100     7     -1/+1    3.7    3.4    3.1   EPN
Ektachrome 200      12     50    125     5     -1/+1    3.7    3.6    3.2  
E200
Agfa CTprecisa200   12     50    120     8     -1/+1    3.2    3.5    3.3   CTp
Agfa RSX 200p       12     50    110     8     -1/+1    3.3    3.3    3.2  
RSX2
Fuji MltiSpeed @400 13     55    135    10     -1/+1    2.9    3.2    2.7   RMS
Fuji Provia F 400   13     ?      ?      ?     -1/+1    ?      ?      ?    
RHP2
Fuji Provia 400     15     40    125     5     -1/+1    3.3    3.2    3.1   RHP
Kodachrome 200      16     50    100    16     -1/+1    3.1    3.2    3.5   PKL
Fuji Provia 1600    25     40    100     7     -1/+1    2.6    2.4    2.2   RSP