Thanks for link. Will check once-in-a-while and see if any info is posted in English. I'm afraid my Ferman only streches as far as ordering wheatbeer...
I can order wheatbeer in German too!
Unfortunate typo above...!
I am guessing that Rollei Infrared and Agfa Scala can be processed with identical parameters, but I still have to proof that.
Originally Posted by Rumzinho
...if the RSD has such amazing quality, why don't you keep using it? There are published recipes on this website for you to use, simply do a search.
Originally Posted by Rumzinho
Probably film speed. -6 DIN*/0.2 ASA is a bit challenging...
Originally Posted by dr5chrome
*Note the negative sign.
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I never used that film but by looking at the original Agfa datasheet and the characteristic curve given there (Agfa does not give speed figures for this film) I assume it would have roughly 12 ASA. Maco states 50 ASA: But as Agfa gained their curve at tungsten lighting and it is an orthochromatic film and Maco may have made their measurements with daylight (corresponding to Maco's suggested use as camera film) the rating of the latter seems ok to me.
Or did I get something terribly wrong?
Last edited by AgX; 07-13-2007 at 08:14 AM. Click to view previous post history.
Originally Posted by AgX
Quote from the current datasheet here: http://www.mahn.net/DL_MAHN/RSDengl.pdf
Since this is not too good english let me describe it based on the german datasheet:
For this, the value is ISO 6 to adjust - at the exposure meter and/or at the camera, afterwards, row exposures with gradual over exposures are recommended around in each case a full f/stop. With an over exposure of four (4) to five (5) f/stops, achieves best results, as the specified examples occupy impressively.
1. set yout meter to 6 ASA.
2. start an exposure sequence starting with normal exposure and add 1 stop per frame
3. best exposure should be ca. +4 to 5 stops.
They started advertising at photokina with 25 to 50 ASA but had to correct this...
I referred to their first datasheet in German on this film. I did not realize that they released a different edition...
(Here the problems of making an ultimate and up-to-date availibility list show up.)
Anyway, I just compared the characteristic curve (Agfa) of this film with another Agfa film (panchromatic / standard reversal) rated at 200 ASA. That showed roughly a difference of 1,2 log units in speed, which would make 4 stops or 12 ASA. Not yet taking into account the different sensitation. So much about theory...
Last edited by AgX; 07-13-2007 at 01:49 PM. Click to view previous post history.
This all is quite enigmatic to me...
Does it mean that Maco, as I, went erroneously on the same wrong path while calculating this films speed?
In trying to deduce the speed of this direct reversal film I did not take into account that the reversal film which I chose for comparison of the curves has a higher Dmax. Considering this still would only show the film in question one or two stops slower than I assumed...