Crazy film/developer tests with charts and scans

[CatLABS]

I met with this people at Photikina and they advised me that they have conducted a massive test of cross referencing films and developers with charts and scans, and they did. Puts the massive dev chart to shame (or should be used along side to confirm various things):
http://www.fotoimport.no/filmtest/fkd76.html

Amazing.

 

[Photo Engineer]

This was posted here before. They have an English version as well.

PE

 

[Trask]

Hmmm...interesting. Certainly the facility to compare these side by side is useful. I'm struck how well Atomal does in comparison with other developers. Thanks for sharing.

 

[AgX]

There is no complete English version, but the text-parts of those tests are switchable into English versions.

 

[zehner21]

Any guide on how to read the graphs? Thanks

 

[AgX]

The red curve is the Characteristic Curve for the specific film at the given developer and time and temperature.

The blue line is the straight part of a curve gained from construction based at Speed Point and slope of the ISO Standard. Call it virtual.
It could help at visualizing the deviation of the actual curve (for instance on speed) from that reference.

As the test includes combos that actually were used to establish ISO values, their actual deviation makes the test less telling at avbsolute level.
However, still usable for comparison between their tests.

 

[Moopheus]

Too bad they didn't include Acros.

 

[BetterSense]

Yeah, too bad they didn't include acros.

I found some results surprising. I wish they would have used a microscope instead of scanning.

I think that there is some grain aliasing going on. The pictures show TMX and TMY with almost identical grain, while I can clearly see a difference under the grain magnifier.

I am surprised that FP4+ has such a long and straight curve compared to TMX, while being faster and almost as fine-grained. I never tried FP4 because I assumed it was similar to plus-x, which I found inferior to TMX in every way.

What an odd curve DELTA3200 has in D76, but totally different in Rodinal.

Even though the authors claimed they had a 40 - stop test wedge, they stop the curve at 2.5. Why does everyone do this? Ut infuriates me. The curve should be shown until it flattens out.